DS1877T+ Maxim Integrated Products, DS1877T+ Datasheet
DS1877T+
Specifications of DS1877T+
Related parts for DS1877T+
DS1877T+ Summary of contents
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... SFF, SFP, and SFP+ Transceiver Modules Dual Rx Video SFPs Ordering Information PART TEMP RANGE DS1877T+ -40NC to +95NC DS1877T+T&R -40NC to +95NC +Denotes a lead(Pb)-free/RoHS-compliant package. T&R = Tape and reel. *EP = Exposed pad. _______________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’ ...
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SFP Controller for Dual Rx Interface Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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SFP Controller for Dual Rx Interface TABLE OF CONTENTS (continued Communication . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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SFP Controller for Dual Rx Interface Figure 1. Power-Up Timing ...
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SFP Controller for Dual Rx Interface ABSOLUTE MAXIMUM RATINGS Voltage Range on RSSI1_, RSSI2_, INX, LOS1, and LOS2 Pins Relative to Ground ...... -0. Voltage Range SDA, SCL, OUTX, FAULT, CC RSELOUT, and LOSOUT Pins ...
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SFP Controller for Dual Rx Interface DAC1, DAC2 ELECTRICAL CHARACTERISTICS (V = +2.85V to +3.9V -40NC to +95NC, unless otherwise noted PARAMETER SYMBOL Main Oscillator Frequency Delta-Sigma Input-Clock Frequency Reference Voltage Input (REFIN) V Output Range ...
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SFP Controller for Dual Rx Interface ANALOG QUICK-TRIP CHARACTERISTICS (V = +2.85V to +3.9V -40NC to +95NC, unless otherwise noted PARAMETER SYMBOL RSSI Full-Scale Voltage Input Resistance Resolution Error Integral Nonlinearity Differential Nonlinearity Temperature Drift Offset ...
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SFP Controller for Dual Rx Interface NONVOLATILE MEMORY CHARACTERISTICS (V = +2.85V to +3.9V, unless otherwise noted.) CC PARAMETER EEPROM Write Cycles Note 1: All voltages are referenced to ground. Current into the IC is positive, and current out of ...
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SFP Controller for Dual Rx Interface (V = +3.3V +25NC, unless otherwise noted SUPPLY CURRENT vs. SUPPLY VOLTAGE 2.50 SDA = SCL = V CC 2.45 DACs AT 1FFh 2.40 2.35 +25°C 2.30 2.25 2.20 2.15 ...
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SFP Controller for Dual Rx Interface TOP VIEW *EXPOSED PAD. PIN NAME 1 RSELOUT Rate-Select Output 2 2 SCL I C Serial-Clock Input 2 3 SDA I C Serial-Data Input/Output Transmit Fault Input and Output, 4 FAULT Open Drain 5 ...
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SFP Controller for Dual Rx Interface SDA INTERFACE SCL EEPROM 256 BYTES AT A0h V CC RSSI1P RSSI1N RSSI2P RSSI2N TEMPERATURE SENSOR RSEL INX LOGIC CONTROL LOS1 LOS2 MAIN MEMORY AT A2h/B2h 10-BIT ...
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SFP Controller for Dual Rx Interface RC FILTERS 12 Typical Operating Circuit +3.3V R ROUT2+ ROUT2- RX2 THRESH2 LOS2 +3.3V R ROUT1+ ROUT1- RX1 THRESH1 LOS1 DS1877 LOS1 DAC1 LOS2 EEPROM FAULT DAC2 LOSOUT LOS RSSI1 SDA ...
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SFP Controller for Dual Rx Interface Detailed Description The DS1877 integrates the control and monitoring func- tionality required in an SFP or SFP+ system. The device is specifically designed for a dual-receiver SFP module. Key components of the device are ...
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SFP Controller for Dual Rx Interface Monitors and Fault Detection Monitoring functions on the device include two QT com- parators and four ADC channels. This monitoring com- bined with the alarm enables (Table 01h/05h) determines when/if the device triggers the ...
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SFP Controller for Dual Rx Interface a factor of 8, and because the result is digitally divided right-shifting, the bit weight of the measurement still meets the standard’s specification (i.e., SFF-8472). The right-shift operation on the ADC ...
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SFP Controller for Dual Rx Interface Dual-range operation is transparent to the end user. The results of RSSI1/RSSI2 ADCs are still stored/reported in the same memory locations (68h−69h, Lower Memory) regardless of whether the conversion was performed in fine mode ...
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SFP Controller for Dual Rx Interface RSSI RESULT Figure 5. Crossover Enabled RSSI RESULT FINE Figure 6. Crossover Disabled SEE RECALL V POA POD PRECHARGED SEE RECALLED VALUE TO 0 Figure 7. Low-Voltage Operation CROSSOVER POINT IDEAL ...
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SFP Controller for Dual Rx Interface Any time V is above POD, the I CC used to determine below the POA level. This is CC accomplished by checking the RDYB bit in the STATUS byte (Lower Memory, ...
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SFP Controller for Dual Rx Interface DAC OFFSET LUTs (04h)[A2h/B2h] EIGHT REGISTERS PER DAC EACH OFFSET REGISTER CAN BE INDEPENDENTLY 1023 SET BETWEEN 0 AND 1020. 1020 = 4 x FFh. THIS EXAMPLE ILLUSTRATES POSITIVE TEMPCO. 767 FCh DAC FBh ...
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SFP Controller for Dual Rx Interface CNFGA register (Table 02h, Register 88h). External pul- lup resistors must be provided on OUTX and RSELOUT to realize high logic levels. FAULT can be triggered by all alarms, warnings, and QTs. The six ...
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SFP Controller for Dual Rx Interface of SCL plus the setup and hold time requirements (Figure 12). Data is shifted into the device during the rising edge of the SCL. Bit Read: At the end of a write operation, the ...
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SFP Controller for Dual Rx Interface 2 TYPICAL I C WRITE TRANSACTION MSB LSB START R/W SLAVE READ/ ADDRESS* WRITE *IF ASEL IS 0, THE SLAVE ADDRESS IS A0h FOR THE AUXILIARY MEMORY ...
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SFP Controller for Dual Rx Interface Reading a Single Byte from a Slave: Unlike the write operation that uses the memory address byte to define where the data written, the read operation occurs at the present value ...
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SFP Controller for Dual Rx Interface ADDRESS A0h 00h EEPROM (256 BYTES) FFh Figure 14. Memory Map Shadowed EEPROM Many nonvolatile memory locations (listed within the Register Descriptions section) are actually shadowed EEPROM and are controlled by ...
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SFP Controller for Dual Rx Interface Register Descriptions The register maps show each byte/word (2 bytes) in terms of its row in the memory. The first byte in the row is located in memory at the row address (hexadecimal) in ...
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SFP Controller for Dual Rx Interface WORD 0 ROW ROW NAME (HEX) BYTE 0/8 <1/C> 00–07 THRESHOLD 0 TEMP ALARM HI <1/C > 08–0F THRESHOLD ALARM HI <1/C> 10–1F EEPROM EE <1/D> 20–27 THRESHOLD 4 RSSI ALARM ...
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SFP Controller for Dual Rx Interface WORD 0 ROW ROW NAME (HEX) BYTE 0/8 <0/C> <8/C> 80 CONFIG 0 MODE <8/C> 88 CONFIG 1 CNFGA <8/C> 90 SCALE 0 RESERVED <8/C> 98 SCALE 1 RSSI2 COARSE SCALE <8/C> A0 OFFSET ...
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SFP Controller for Dual Rx Interface WORD 0 ROW ROW NAME (HEX) BYTE 0/8 80–F7 EMPTY EMPTY <7/M> <D> <M> F8–FF ALARM ENABLE ALARM EN 3 <C> or <_/C> = Common, <D> or <_/D> = Different, <M> or <_/M> = ...
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SFP Controller for Dual Rx Interface Lower Memory, Register 00h–01h: TEMP ALARM HI Lower Memory, Register 04h–05h: TEMP WARN HI FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE 6 00h, 04h 01h, ...
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SFP Controller for Dual Rx Interface Lower Memory, Register 08h–09h: V Lower Memory, Register 0Ch–0Dh: V FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE 15 14 08h, 0Ch 09h, 0Dh 2 2 ...
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SFP Controller for Dual Rx Interface Lower Memory, Register 20h–21h: RSSI ALARM HI Lower Memory, Register 24h–25h: RSSI WARN HI FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE 15 14 20h, 24h ...
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SFP Controller for Dual Rx Interface Lower Memory, Register 28h–37h: EE FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE 28h–37h EE EE BIT 7 PW2 level access-controlled EEPROM. Lower Memory, Register 38h–4Fh: EE FACTORY DEFAULT READ ...
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SFP Controller for Dual Rx Interface Lower Memory, Register 60h–61h: TEMP VALUE POWER-ON VALUE READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE 6 60h 61h 2 2 BIT 7 Signed two’s complement direct-to-temperature measurement. ...
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SFP Controller for Dual Rx Interface Lower Memory, Register 68h–69h: RSSI VALUE POWER-ON VALUE READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE 15 14 68h 69h 2 2 BIT 7 Left-justified unsigned voltage measurement. ...
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SFP Controller for Dual Rx Interface Lower Memory, Register 6Eh: STATUS POWER-ON VALUE READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE Write N/A All Access <5/D> 6Eh RESERVED TXDC BIT 7 BIT 7 RESERVED TXDC1 [A2h]: TXD1 software ...
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SFP Controller for Dual Rx Interface Lower Memory, Register 6Fh: UPDATE POWER-ON VALUE READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE 6Fh TEMP RDY VCC RDY BIT 7 TEMP RDY, VCC RDY, RSSI RDY: Update of completed conversions. ...
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SFP Controller for Dual Rx Interface Lower Memory, Register 71h: ALARM POWER-ON VALUE READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE 71h RSSI HI RSSI LO BIT 7 RSSI HI: High alarm status for RSSI measurement. A TXD ...
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SFP Controller for Dual Rx Interface Lower Memory, Register 73h: ALARM POWER-ON VALUE READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE 73h LOS HI LOS LO BIT 7 LOS HI: High alarm status for RSSI; fast comparison. A ...
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SFP Controller for Dual Rx Interface Lower Memory, Registers 75h–7Ah: RESERVED POWER-ON VALUE READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE These registers are reserved. The value when read is 00h. Lower Memory, Registers 7Bh–7Eh: PASSWORD ENTRY (PWE) ...
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SFP Controller for Dual Rx Interface Table 01h, Register 80h–F7h: EEPROM POWER-ON VALUE READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE 80h–F7h EE EE BIT 7 EEPROM for PW1 and/or PW2 level access. Table 01h, Register F8h: ALARM ...
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SFP Controller for Dual Rx Interface Table 01h, Register F9h: ALARM EN POWER-ON VALUE READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE F9h RSSI HI RSSI LO BIT 7 Layout is identical to ALARM Register 71h). The MASK ...
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SFP Controller for Dual Rx Interface Table 01h, Register FBh: ALARM EN POWER-ON VALUE READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE FBh LOS HI LOS LO BIT 7 Layout is identical to ALARM whether this memory exists ...
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SFP Controller for Dual Rx Interface Table 01h, Register FDh–FFh: RESERVED POWER-ON VALUE READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE These registers are reserved. Table 02h, Register 80h: MODE POWER-ON VALUE READ ACCESS WRITE ACCESS A2h AND ...
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SFP Controller for Dual Rx Interface Table 02h, Register 81h: TEMPERATURE INDEX (TINDEX) FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE 7 6 81h 2 2 BIT 7 Holds the calculated index based on the temperature ...
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SFP Controller for Dual Rx Interface Table 02h, Register 87h: DEVICE VER FACTORY DEFAULT READ ACCESS WRITE ACCESS MEMORY TYPE 87h BIT 7 Hardwired connections to show the device version. Table 02h, Register 88h: CNFGA FACTORY DEFAULT READ ACCESS WRITE ...
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SFP Controller for Dual Rx Interface Table 02h, Register 89h: CNFGB FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE 89h INXC INVOUTX BIT 7 INXC: INX software control bit (see Figure 11). BIT ...
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SFP Controller for Dual Rx Interface Table 02h, Register 8Ah: CNFGC FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE TXD_RST 8Ah RESERVED EN DAC2 BIT 7 BITS 7, 3 RESERVED TXD_RST EN DAC2: BIT 6 0 ...
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SFP Controller for Dual Rx Interface Table 02h, Register 8Ch: RESERVED FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE This register is reserved. Table 02h, Register 8Dh: FORCE RSSI FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h ...
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SFP Controller for Dual Rx Interface Table 02h, Register 8Eh: RIGHT-SHIFT FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE 8Eh RESERVED RSSI2C 2 BIT 7 Allows for right-shifting the final answer of RSSI2 COARSE and RSSI2 ...
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SFP Controller for Dual Rx Interface Table 02h, Register 92h–93h Table 02h, Register 94h–95h: XOVER2 COARSE Table 02h, Register 96h–97h: XOVER2 FINE Table 02h, Register 98h–99h: RSSI2 COARSE SCALE Table 02h, Register 9Ah–9Bh: RSSI2 FINE SCALE Table 02h, ...
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SFP Controller for Dual Rx Interface Table 02h, Register A2h–A3h Table 02h, Register A4h–A5h: XOVER1 COARSE Table 02h, Register A6h–A7h: XOVER1 FINE Table 02h, Register A8h–A9h: RSSI2 COARSE OFFSET Table 02h, Register AAh–ABh: RSSI2 FINE OFFSET Table 02h, ...
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SFP Controller for Dual Rx Interface Table 02h, Register B0h–B3h: PW1 FACTORY DEFAULT READ ACCESS WRITE ACCESS MEMORY TYPE 31 30 B0h B1h B2h B3h 2 2 BIT ...
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SFP Controller for Dual Rx Interface Table 02h, Register B8h: LOS RANGING FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE B8h RESERVED HLOS2 BIT 7 This register controls the full-scale range of the QT monitoring for ...
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SFP Controller for Dual Rx Interface Table 02h, Register B9h: RESERVED FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE This register is reserved. Table 02h, Register BAh: HLOS2 FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND ...
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SFP Controller for Dual Rx Interface Table 02h, Register BCh: LOS RANGING FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE BCh RESERVED HLOS1 BIT 7 This register controls the full-scale range of the QT monitoring for ...
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SFP Controller for Dual Rx Interface Table 02h, Register BDh: RESERVED FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE This register is reserved. Table 02h, Register BEh: HLOS1 FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND ...
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SFP Controller for Dual Rx Interface Table 02h, Register C0h: PW_ENA FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE C0h RESERVED RWTBL1C BIT 7 BIT 7 RESERVED RWTBL1C: Table 01h or 05h bytes F8h–FFh. Table address ...
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SFP Controller for Dual Rx Interface Table 02h, Register C1h: PW_ENB FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE C1h RWTBL46 RTBL1C BIT 7 RWTBL46: Table 04h. BIT (default) Read and write access ...
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SFP Controller for Dual Rx Interface Table 02h, Register C2h–C5h: RESERVED FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE These registers are reserved. Table 02h, Register C6h: POLARITY FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND ...
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SFP Controller for Dual Rx Interface Table 02h, Register C7h: TBLSELPON FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE 7 6 C7h 2 2 BIT 7 Chooses the initial value for the TBL SEL byte (Lower ...
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SFP Controller for Dual Rx Interface Table 02h, Register CCh–CDh: DAC1 VALUE FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE CCh CDh 2 2 BIT 7 The digital value used for DAC1 ...
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SFP Controller for Dual Rx Interface Table 04h, Register 80h–C7h: DAC LUT FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE 7 6 80h–C7h 2 2 BIT 7 Digital value for the DAC1 VALUE (A2h address) and ...
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SFP Controller for Dual Rx Interface Table 04h, Register F8h–FFh: DAC OFFSET LUT FACTORY DEFAULT READ ACCESS WRITE ACCESS A2h AND B2h MEMORY MEMORY TYPE 9 F8h–FFh 2 2 BIT 7 The digital value for the temperature offset of the ...
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SFP Controller for Dual Rx Interface Auxiliary Memory A0h, Register 80h–FFh: EEPROM FACTORY DEFAULT READ ACCESS WRITE ACCESS MEMORY TYPE 7 6 80h–FFh 2 2 BIT 7 Accessible with the slave address A0h. Applications Information Power-Supply Decoupling To achieve best ...
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