参数资料
型号: MAX9214EUM+TD
厂商: Maxim Integrated Products
文件页数: 15/17页
文件大小: 0K
描述: IC DESERIALIZER PROG 48TSSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
功能: 解串器
数据速率: 1.785Gbps
输入类型: LVDS
输出类型: LVTTL,LVCMOS
输入数: 3
输出数: 21
电源电压: 3 V ~ 3.6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 48-TFSOP(0.240",6.10mm 宽)
供应商设备封装: 48-TSSOP
包装: 带卷 (TR)
MAX9210/MAX9214/MAX9220/MAX9222
Programmable DC-Balance
21-Bit Deserializers
_______________________________________________________________________________________
7
Detailed Description
The MAX9210/MAX9220 operate at a parallel clock fre-
quency of 8MHz to 34MHz in DC-balanced mode and
10MHz to 40MHz in non-DC-balanced mode. The
MAX9214/MAX9222 operate at a parallel clock frequency
of 16MHz to 66MHz in DC-balanced mode and 20MHz to
85MHz in non-DC-balanced mode. The transition times of
the single-ended outputs are increased on the
MAX9210/MAX9220 for reduced EMI.
DC-balanced or non-DC-balanced operation is con-
trolled by the DCB/NC pin (see Table 1 for DCB/NC
default settings and operating modes). In non-DC-bal-
anced mode, each channel deserializes 7 bits every
cycle of the parallel clock. In DC-balanced mode, 9 bits
are deserialized every clock cycle (7 data bits + 2 DC-
balance bits). The highest data rate in DC-balanced
mode for the MAX9214 and MAX9222 is 66MHz x 9 =
594Mbps. In non-DC-balanced mode, the maximum
data rate is 85MHz x 7 = 595Mbps.
DC Balance
Data coding by the MAX9209/MAX9213 serializers
(which are companion devices to the MAX9210/
MAX9214/MAX9220/MAX9222 deserializers) limits the
imbalance of ones and zeros transmitted on each chan-
nel. If +1 is assigned to each binary 1 transmitted and -1
is assigned to each binary 0 transmitted, the variation in
the running sum of assigned values is called the digital
sum variation (DSV). The maximum DSV for the data
channels is 10. At most, 10 more zeros than ones, or 10
more ones than zeros, are transmitted. The maximum
DSV for the clock channel is five. Limiting the DSV and
choosing the correct coupling capacitors maintains dif-
ferential signal amplitude and reduces jitter due to
droop on AC-coupled links.
VCC - 0.3V
VCC
RIN2
RIN1
RxIN_ + OR
RxCLK IN+
RxIN_ - OR
RxCLK IN-
RIN1
RxIN_ + OR
RxCLK IN+
RxIN_ - OR
RxCLK IN-
RIN1
NON-DC-BALANCED MODE
DC-BALANCED MODE
1.2V
Figure 1. LVDS Input Circuits
Table 1. DC-Balance Programming
DEVICE
DCB/NC
OUTPUT STROBE
EDGE
OPERATING MODE
OPERATING
FREQUENCY (MHz)
High or open
DC balanced
8 to 34
MAX9210
Low
Rising
Non-DC balanced
10 to 40
High or open
DC balanced
16 to 66
MAX9214
Low
Rising
Non-DC balanced
20 to 85
High or open
DC balanced
8 to 34
MAX9220
Low
Falling
Non-DC balanced
10 to 40
High or open
DC balanced
16 to 66
MAX9222
Low
Falling
Non-DC balanced
20 to 85
RCIP
RxCLK OUT
ODD RxOUT
EVEN RxOUT
RISING EDGE STROBE SHOWN.
Figure 2. Worst-Case Test Pattern
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