DS1874T+ Maxim Integrated Products, DS1874T+ Datasheet - Page 77

• Manufacturer Part Number: DS1874T+
• Description: IC CTLR SFP+ ANLG LDD 28-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Laser Diode Controllerr

Specifications of DS1874T+

• Number Of Channels: 1
• Voltage - Supply: 2.85 V ~ 3.9 V
• Current - Supply: 2.5mA
• Operating Temperature: -40°C ~ 95°C
• Package / Case: 28-WFQFN Exposed Pad
• Mounting Type: Surface Mount
• Number Of Outputs: 5
• Duty Cycle (max): 50 %
• Output Voltage: 0 V to 3.9 V
• Mounting Style: SMD/SMT
• Switching Frequency: 0 KHz to 400 KHz
• Operating Supply Voltage: 2.85 V to 3.9 V
• Supply Current: 2.5 mA to 10 mA
• Maximum Operating Temperature: + 95 C
• Fall Time: 300 ns
• Minimum Operating Temperature: - 40 C
• Rise Time: 300 ns
• Synchronous Pin: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 90-1874T+000

Table 02h, Register CFh: DEVICE VER
Table 02h, Register D0h–D7h: HBATH
D0h-D7h
CFh
SFP+ Controller with Digital LDD Interface
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
Hardwired connections to show the device version.
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
High-Bias Alarm Threshold (HBATH) is a digital clamp used to ensure that the DAC setting for BIAS currents
does not exceed a set value. The table below shows the range of temperature for each byte’s location. The
table shows a rising temperature; for a falling temperature there is 1°C of hysteresis.
BIT 7
BIT 7
______________________________________________________________________________________
D0h
D1h
D2h
D3h
D4h
D5h
D6h
D7h
2
7
Less than or equal to -8°C
Greater than -8°C up to +8°C
Greater than +8°C up to +24°C
Greater than +24°C up to +40°C
Greater than +40°C up to +56°C
Greater than +56°C up to +72°C
Greater than +72°C up to +88°C
Greater than +88°C
2
6
00h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
PW2 or (PW1 and RWTBL246)
Nonvolatile (SEE)
DEVICE VERSION
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
N/A
ROM
2
5
DEVICE VERSION
2
4
2
3
2
2
2
1
BIT 0
BIT 0
2
0
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