参数资料
型号: DS1874T+
厂商: Maxim Integrated
文件页数: 84/88页
文件大小: 0K
描述: IC CTLR SFP+ ANLG LDD 28-TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 60
类型: 激光二极管控制器
通道数: 1
电源电压: 2.85 V ~ 3.9 V
电流 - 电源: 2.5mA
工作温度: -40°C ~ 95°C
封装/外壳: 28-WFQFN 裸露焊盘
供应商设备封装: 28-TQFN-EP(5x5)
包装: 管件
安装类型: 表面贴装
其它名称: 90-1874T+000
SFP+ Controller with Digital LDD Interface
Table 02h, Register FDh: TXSTAT2
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
00h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
N/A
Volatile
FDh
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
BIT 7
BIT 0
MAX3798/MAX3799 register. This value is read from the MAX3798/MAX3799 with the 3-wire interface every t RR
(see the MAX3798/MAX3799 electrical characteristics).
Table 02h, Register FEh–FFh: RESERVED
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
00h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
PW2 or (PW1 and RWTBL246)
Volatile
These registers are reserved.
Table 04h Register Description
Table 04h, Register 80h–C7h: MODULATION LUT
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
00h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
PW2 or (PW1 and RWTBL246)
Nonvolatile (EE)
80h –C7h
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
BIT 7
BIT 0
The digital value for the modulation DAC output.
The MODULATION LUT is a set of registers assigned to hold the temperature profile for the MODULATION
REGISTER. The values in this table determine the set point for the modulation voltage. The temperature
measurement is used to index the LUT (TINDEX, Table 02h, Register 81h) in 2°C increments from -40°C to
+102°C, starting at 80h in Table 04h. Register 80h defines the -40°C to -38°C MOD output, Register 81h defines
the -38°C to -36°C MOD output, and so on. Values recalled from this EEPROM memory table are written into the
MODULATION REGISTER (Table 02h, Register 82h –83h) location that holds the value until the next temperature
conversion. The DS1874 can be placed into a manual mode (MOD EN bit, Table 02h, Register 80h), where the
MODULATION REGISTER is directly controlled for calibration. If the temperature compensation functionality is
not required, then program the entire Table 04h to the desired modulation setting.
84
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