MAX6889 MAXIM [Maxim Integrated Products], MAX6889 Datasheet
MAX6889
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MAX6889 Summary of contents
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... Additional (MAX6889) High-Voltage Input (1.25V to 7.625V or 2.5V to 15.25V) o Four (MAX6889/MAX6890) or Three (MAX6891) General-Purpose Logic Inputs o Configurable Watchdog Timer o Ten (MAX6889), Eight (MAX6890), or Five (MAX6891) Programmable Outputs Active-High, Active-Low, Open Drain, Weak Pullup Timing Delays from 25µs to 1600ms o Margining Disable and Manual Reset Controls ...
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EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) IN2–IN7 SDA, SCL, A0, A1, GPI_ CC MR, MARGIN .........................................................-0.3V to +6V IN1, PO_ .................................................................-0.3V to +14V IN8 ..........................................................................-0.3V to +20V DBP ..........................................................................-0.3V to +3V Input/Output ...
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EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors ELECTRICAL CHARACTERISTICS (continued 6.5V to 13.2V, V –V = 2.7V to 5.5V, V IN1 IN2 IN7 wise noted. Typical values are +25°C.) (Notes PARAMETER SYM B O ...
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EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors ELECTRICAL CHARACTERISTICS (continued 6.5V to 13.2V, V –V = 2.7V to 5.5V, V IN1 IN2 IN7 wise noted. Typical values are +25°C.) (Notes PARAMETER SYM B O ...
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EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors ELECTRICAL CHARACTERISTICS (continued 6.5V to 13.2V, V –V = 2.7V to 5.5V, V IN1 IN2 IN7 wise noted. Typical values are +25°C.) (Notes PARAMETER SYM B O ...
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... Specifications –V is between 2.7V and 5.5V, while the remaining V IN2 IN5 is externally supplied. CC (see the Powering the MAX6889/MAX6890/MAX6891 section equals the maximum of IN2 to IN5 > 2.7V, the input that powers the device cannot be determined. IN5 Typical Operating Characteristics = 2.7V to 5.5V, GPI_ = GND, MARGIN = MR = DBP, T SUPPLY CURRENT vs. SUPPLY VOLTAGE (IN2– ...
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EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors (V = 6.5V to 13.2V 10V, V IN1 IN8 IN_ IN_ TO PO_ PROPAGATION DELAY vs. TEMPERATURE 30 100mV OVERDRIVE -40 - ...
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... EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors PIN MAX6889 MAX6890 MAX6891 — — — 9 — — 10 — — _______________________________________________________________________________________ NAME Programmable Output 2. Configurable, active-high, active-low, open-drain, or weak pullup output. PO2 pulls low with a 10µA internal current sink for 1V < V PO2 < ...
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... Serial Data Input/Output (Open Drain). SDA requires an external pullup resistor. SCL Serial Clock Input. SCL requires an external pullup resistor. Address Input 0. Address inputs allow up to four (MAX6889/MAX6890) or two A0 (MAX6891) connections on one common bus. Connect A0 to GND or to the serial-interface power supply. ...
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... EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors PIN MAX6889 MAX6890 MAX6891 25 21 — — — ______________________________________________________________________________________ NAME Voltage Input 6. Configure IN6 to detect voltage thresholds between 1V and 5.5V in 20mV increments, or 0.5V to 3.05V in 10mV increments. For improved noise IN6 immunity, bypass IN6 to GND with a 0.1µ ...
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... MAIN CHARGE PUMP OSCILLATOR CONFIG REGISTERS MAX6889 MAX6890 MAX6891 GND PO_ OUTPUT PO1 10µA POWER-UP PULLDOWN PO2 PO3 PO4 PO5 PO6* PO7* PO8* PO9** PO10** EEPROM CONFIG EEPROM USER EEPROM SDA SCL 2-WIRE INTERFACE FOR MAX6889/MAX6890 ONLY. ** FOR MAX6889 ONLY. 11 ...
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... Inputs (IN2–IN7) monitor voltages from 0.5V to 3.05V in 10mV increments, or 1.0V to 5.5V in 20mV increments. An additional high-voltage input (IN8, MAX6889 only) mon- itors voltages from 1.25V to 7.625V in 25mV incre- ments, or 2.5V to 15.25V in 50mV increments ...
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... Functional Diagram ). IN1 must be at least 4V, or one of IN2–IN5 (MAX6889/MAX6890)/IN2–IN4 (MAX6891) must be at least 2.7V to ensure device operation. An internal LDO regulates IN1 down to 5.4V. The highest input voltage on IN2–IN5 (MAX6889/ MAX6890)/IN2–IN4 (MAX6891) supplies power to the device, unless V > 6.5V, in which case IN1 supplies IN1 power to the device. For 4V < ...
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... V to ensure the device is fully CC operational. The MAX6889/MAX6890/MAX6891 also generate a dig- ital supply voltage (DBP) for the internal logic circuitry and the EEPROM. Bypass DBP to GND with a 1µF ceramic capacitor installed as close to the device as possible. The nominal DBP output voltage is 2.55V. Do not use DBP to provide power to external circuitry ...
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... IN6 (MAX6889/MAX6890 only) range selection 5.5V range in 20mV increments [5] 0.5V to 3.05V range in 10mV increments IN7 (MAX6889 only) range selection 5.5V range in 20mV increments 0.5V to [6] 3.05V range in 10mV increments [7] Not used IN2 input impedance normal mode high-Z mode, with a 0.1667V to 1.0167V range in [1] 3 ...
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... DESCRIPTION GPI1 active-low active-high. GPI2 active-low active-high. GPI3 active-low active-high. GPI4 (MAX6889/MAX6890 only active-low active-high. MARGIN configured as active-high is considered asserted when that output is logic-high. The voltage monitors generate fault signals (logical 0) to the MAX6889/MAX6890/MAX6891s’ logic array when an input voltage is below the programmed undervoltage threshold ...
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... PO8 (MAX6889/MAX6890 only PO8 independent of MR PO8 asserts when MR = low. PO9 (MAX6889 only PO9 independent of MR PO9 asserts when MR = low. PO10 (MAX6889 only PO10 independent of MR PO10 asserts when MR = low. OUTPUT ASSERTION CONDITIONS 1 = PO1 assertion depends on IN1 undervoltage threshold (Table PO1 assertion depends on IN2 undervoltage threshold (Table 3) ...
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... PO2 assertion depends on IN8 (MAX6890 only) undervoltage threshold (Table PO2 assertion depends on watchdog (Table 20 PO2 assertion depends on GPI1 (Table PO2 assertion depends on GPI2 (Table PO2 assertion depends on GPI3 (Table PO2 assertion depends on GPI4 (MAX6889/MAX6890 only) (Table PO2 asserts when MR = low (Table 6) Not used ...
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... PO3 assertion depends on IN8 (MAX6890 only) undervoltage threshold (Table PO3 assertion depends on watchdog (Table 20 PO3 assertion depends on GPI1 (Table PO3 assertion depends on GPI2 (Table PO3 assertion depends on GPI3 (Table PO3 assertion depends on GPI4 (MAX6889/MAX6890 only) (Table PO3 asserts when MR = low (Table 6) Not used 19 ...
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... PO4 assertion depends on IN8 (MAX6890 only) undervoltage threshold (Table PO4 assertion depends on watchdog (Table 20 PO4 assertion depends on GPI1 (Table PO4 assertion depends on GPI2 (Table PO4 assertion depends on GPI3 (Table PO4 assertion depends on GPI4 (MAX6889/MAX6890 only) (Table PO4 asserts when MR = low (Table 6) Not used ...
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... PO5 assertion depends on IN8 (MAX6890 only) undervoltage threshold (Table PO5 assertion depends on watchdog (Table 20 PO5 assertion depends on GPI1 (Table PO5 assertion depends on GPI2 (Table PO5 assertion depends on GPI3 (Table PO5 assertion depends on GPI4 (MAX6889/MAX6890 only) (Table PO5 asserts when MR = low (Table 6) Not used 21 ...
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... Note: Table 13 only applies to PO7 (MAX6889/MAX6890 only). Write a “0” bit to make the PO7 output independent of the respective signal (IN_ thresholds, WD, GPI_, or MR). 22 ______________________________________________________________________________________ OUTPUT ASSERTION CONDITIONS 1 = PO6 assertion depends on IN1 undervoltage threshold (Table PO6 assertion depends on IN2 undervoltage threshold (Table 3) ...
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... A3h [3] [4] [5] [7:6] Note: Table 15 only applies to PO9 (MAX6889 only). Write a “0” bit to make the PO9 output independent of the respective signal (IN_ thresholds, WD, GPI_, or MR). ______________________________________________________________________________________ OUTPUT ASSERTION CONDITIONS 1 = PO8 assertion depends on IN1 undervoltage threshold (Table PO8 assertion depends on IN2 undervoltage threshold (Table 3) ...
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... PO1 0 = active-low active-high PO2 0 = active-low active-high PO3 0 = active-low active-high PO4 0 = active-low active-high PO5 0 = active-low active-high PO6 MAX6889/MAX6890 only active-low active-high. PO7 MAX6889/MAX6890 only active-low active-high. PO8 MAX6889/MAX6890 only active-low active-high. PO9 MAX6889 only active-low active-high. PO10 MAX6889 only active-low active-high. DESCRIPTION ...
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... AEh Bit[ use an externally supplied, always-on V ensure register 2Eh and EEPROM CC address AEh Bit[2] =1 (see the Powering the MAX6889/ MAX6890/MAX6891 section). A unique write-disable feature protects the MAX6889/ MAX6890/MAX6891 from inadvertent user-EEPROM writes. As input voltages that power the serial interface, a microprocessor, or any other writing-devices fall, unintentional data may be written onto the data bus ...
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... PO4 0 = weak pullup open drain PO5 0 = weak pullup open drain PO6 MAX6889/MAX6890 only weak pullup open drain. PO7 MAX6889/MAX6890 only weak pullup open drain. PO8 MAX6889/MAX6890 only weak pullup open drain. PO9 MAX6889 only weak pullup open drain. ...
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... A9h [7:6] ______________________________________________________________________________________ DESCRIPTION Watchdog Input Selection GPI1 input 01 = GPI2 input 10 = GPI3 input 11 = GPI4 input (MAX6889/MAX6890 only). Selects GPI3 on MAX6891. Watchdog Internal Input Selection: 0000 = PO1 0001 = PO2 0010 = PO3 0011 = PO4 0100 = PO5 0101 = PO6 (MAX6889/MAX6890 only) 0110 = PO7 (MAX6889/MAX6890 only) ...
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EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors Table 21. Watchdog Timeout Period Selection EEPROM REGISTER BIT MEMORY ADDRESS RANGE ADDRESS [2:0] 2Ah AAh [5:3] [6] [7] Table 22. Configuration Lock and Internal/External V EEPROM REGISTER BIT MEMORY ADDRESS RANGE ADDRESS [0] [1] 2Eh ...
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... The configuration EEPROM addresses range from 80h to AEh. Write data to the configuration EEPROM to auto- matically set up the MAX6889/MAX6890/MAX6891 upon power-up. Data is transferred from the configuration EEPROM to the configuration registers when V exceeds UVLO during power-up or after a software ...
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... SDA and SCL facilitate bidirectional communication between the MAX6889/MAX6890/MAX6891 and the master device at clock rates up to 400kHz. Figure 3 shows the 2-wire inter- face timing diagram. The MAX6889/MAX6890/MAX6891 ...
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... The master device (typically a microcontroller) generates SCL and ini- tiates data transfer on the bus. A master device communicates to the MAX6889/ MAX6890/MAX6891 by transmitting the proper address followed by command and/or data words. Each trans- mit sequence is framed by a START (S) or REPEATED START (SR) condition and a STOP (P) condition ...
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... SA2 correspond to the A1 and A0 address inputs of the MAX6889/MAX6890/MAX6891 (hardwired as logic-low or logic-high). SA0 is a read/write flag bit (0 = write read). The A0 and A1 address inputs allow up to four MAX6889/MAX6890 to connect to one bus, while the A0 address input allows up to two MAX6891s to con- START CONDITION 1 ...
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EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors The send byte protocol allows the master device to send one byte of data to the slave device (see Figure 8). The send byte presets a register pointer address for a subsequent read or write. The ...
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... For the con- figuration registers, valid address pointers range from 00h to 2Fh. Register addresses outside of this range result in a NACK being issued from the MAX6889/ MAX6890/MAX6891. When using the block write proto- col, the address pointer automatically increments after each data byte, except when the address pointer is already at 2Fh ...
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... Figure 8. SMBus/I C Protocols Applications Information Configuration Download at Power-up The configuration of the MAX6889/MAX6890/MAX6891 (undervoltage thresholds, PO_ timeout periods, watch- dog behavior, programmable output conditions and configurations, etc.) depends on the contents of the EEPROM. The EEPROM is comprised of buffered latch- es that store the configuration. The local volatile memo- ry latches lose their contents at power-down ...
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... IN4 undervoltage detector threshold (Table 3) IN5 undervoltage detector threshold (MAX6889/MAX6890 only) (Table 3) IN6 undervoltage detector threshold (MAX6889/MAX6890 only) (Table 3) IN7 undervoltage detector threshold (MAX6889 only) (Table 3) IN8 undervoltage detector threshold (MAX6889 only) (Table 4) Threshold range selection (Tables 2, 3, and 4) High-Z mode selection (Tables 2, 3, and 4) ...
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... 6889/M AX 6890 eout and outp ut typ e sel ecti on ( Tab l es 17, 18, and 19) PO9 (MAX6889 only) input selection (Table 15) PO9 (MAX6889 only) input selection (Table 15) PO9 (MAX6889 only) timeout period and output type selection (Tables 17, 18, and 19) PO10 (MAX6889 only) input selection (Table 16) PO10 (MAX6889 only) input selection (Table 16) ...
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... EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors TOP VIEW PO2 1 PO3 2 PO4 3 GND 4 MAX6889 PO5 5 6 PO6 PO7 7 8 PO8 *EXPOSED PAD (5mm x 5mm THIN QFN) *EXPOSED PAD INTERNALLY CONNECTED TO GND. TOP VIEW GND 38 ______________________________________________________________________________________ TOP VIEW IN7 ...
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EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors 12V DC-DC 1 IN1 PO1 MARGIN DBP 12V SUPPLY 12V BUS INPUT t PO1 PO1 ENABLE 5V DC-DC CONVERTER 5V SUPPLY 5V OUTPUT t PO2 PO2 2.5V SUPPLY t PO3 3.3V SUPPLY PO4 ...
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EEPROM-Programmable, Octal/Hex/Quad, Power-Supply Sequencers/Supervisors REVISION REVISION NUMBER DATE 0 2/05 Initial release 1 9/08 Added specifications to Electrical Characteristics. Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent ...