DS1874T+ Maxim Integrated Products, DS1874T+ Datasheet - Page 80

• 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 EDh: IMODMAX
SFP+ Controller with Digital LDD Interface
Table 02h, Register EEh: IBIASMAX
80
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EDh
EEh
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
MAX3798/MAX3799 register. After either V
bit is set high (visible in 3W TXSTAT1, Bit 7) or on a rising edge of TXD, this value is written to the MAX3798/
MAX3799 through the 3-wire interface. In addition, this value defines the maximum DAC value allowed for the
upper 8 bits of BIAS output during APC closed-loop operations. During the intial step and binary search, this
value does not cause an alarm but still clamps the BIAS register value. After the startup seqence (or normal
APC operations), if the APC loop tries to create a BIAS value greater than this setting, it is clamped and creates
a MAX BIAS alarm.
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
MAX3798/MAX3799 register. After either V
bit is set high (visible in 3W TXSTAT1, Bit 7) or on a rising edge of TXD, this value is written to the MAX3798/
MAX3799 through the 3-wire interface.
BIT 7
BIT 7
2
2
7
7
2
2
6
6
00h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
PW2 or (PW1 and RWTBL246)
Nonvolatile (SEE)
00h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
PW2 or (PW1 and RWTBL246)
Nonvolatile (SEE)
2
2
5
5
CC
CC
exceeds POA (after a POR event), the MAX3798/MAX3799 TX_POR
exceeds POA (after a POR event), the MAX3798/MAX3799 TX_POR
2
2
4
4
2
2
3
3
2
2
2
2
2
2
1
1
BIT 0
BIT 0
2
2
0
0