参数资料
型号: DS1875T+
厂商: Maxim Integrated Products
文件页数: 62/92页
文件大小: 0K
描述: IC SFP CTRLR/TRIPLEXER 38-TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 90
应用: 光纤
接口: I²C
电源电压: 2.85 V ~ 3.9 V
封装/外壳: 38-WFQFN 裸露焊盘
供应商设备封装: 38-TQFN(5x7)
包装: 管件
安装类型: 表面贴装
产品目录页面: 1431 (CN2011-ZH PDF)
DS1875
Table 02h, Register 88h: SAMPLE RATE
FACTORY DEFAULT
30h
READ ACCESS
PW2
WRITE ACCESS
PW2
MEMORY TYPE
Nonvolatile (SEE)
88h
SEE
PWM_FR1
PWM_FR0
APC_SR3
APC_SR2
APC_SR1
APC_SR0
BIT 7
BIT 0
BITS 7:6
SEE
BITS 5:4
PWM_FR[1:0]: 2-bit frequency rate for the SW pulsed output used with PWM. When switching a
lower to a higher frequency, disable the SW output by setting SOFT M3QT (Byte 78h) to a 1 before
changing PWM_FR. After changing PWM_FR, wait 200 periods of the new frequency before
enabling the SW output. This delay allows for the internal signals to integrate and lock to the new
frequency without creating a large duty cycle.
00b: 131.25kHz
01b: 262.5kHz
10b: 525kHz
11b: 1050kHz (Default)
BITS 3:0
APC_SR[3:0]: 4-bit sample rate for comparison of APC control.
APC_SR[3:0]
MINIMUM TIME FROM
BEN TO FIRST SAMPLE
(tFIRST) ±50ns
(ns)
REPEATED SAMPLE
PERIOD FOLLOWING
FIRST SAMPLE (tREP)
(ns)
0000b
350
800
0001b
550
1200
0010b
750
1600
0011b
950
2000
0100b
1350
2800
0101b
1550
3200
0110b
1750
3600
0111b
2150
4400
1000b
2950
6000
1001b*
3150
6400
Defines the sample rate for comparison of APC control.
*
All codes greater than 1001b (1010b to 1111b) use the maximum sample time of
code 1001b.
PON Triplexer and SFP Controller
______________________________________________________________________________________
65
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