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参数资料
| 型号： | 74LCXR2245WMX |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 4/12页 |
| 文件大小： | 0K |
| 描述： | IC TRANSCVR BIDIRECT LV 20SOIC |
| 标准包装： | 1 |
| 系列： | 74LCX |
| 逻辑类型： | 收发器，非反相 |
| 元件数： | 1 |
| 每个元件的位元数： | 8 |
| 输出电流高，低： | 12mA，12mA |
| 电源电压： | 2 V ~ 3.6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 20-SOIC |
| 包装： | 标准包装 |
| 产品目录页面： | 1211 (CN2011-ZH PDF) |
| 其它名称： | 74LCXR2245WMXDKR |
12
COMMERCIALTEMPERATURERANGE
IDT72V70190 3.3V TIME SLOT INTERCHANGE
DIGITAL SWITCH 256 x 256
TABLE 10 — CONNECTION MEMORY BITS
NOTE:
1. If bit 13 (PC) of the corresponding connection memory location is 1 (device in processor mode), then these entire 8 bits (SAB0, bits 6-5, CAB4 - CAB0) are output on the
output channel and stream associated with this location.
Bit
Name
Description
15
LPBK
When 1, the RX n channel m data comes from the TX n channel m. For proper per channel loopback
(Per Channel Loopback)
operations, set the delay offset register bits OFn[2:0] to zero for the streams which are in the loopback mode.
14
V/C
This bit is used to select between the variable (LOW) and constant delay (HIGH) mode on a
(Variable/Constant
per-channel basis.
Throughput Delay)
13
PC
When 1, the contents of the connection memory are output on the corresponding output channel and stream.
(Processor Channel)
Only the lower byte (bit 7 – bit 0) will be output to the TX output pins. When 0, the contents of the connection
memory are the data memory address of the switched input channel and stream.
12
CCO
This bit is output on the CCO pin one channel early. The CCO bit for stream 0 is output first.
(Control Channel Output)
11
OE
This bit enables the TX output drivers on a per-channel basis. When 1, the output driver functions
(Output Enable)
normally. When 0, the output driver is in a high-impedance state.
10
Unused
Must be zero for normal operation.
9,8,7(1) SAB2-0
The binary value is the number of the data stream for the source of the connection.
(Source Stream Address Bits)
6,5(1)
Unused
Must be zero for normal operation.
4-0(1)
CAB4-0
The binary value is the number of the channel for the source of the connection.
(Source Channel Address Bits)
15
14
13
12
11
10
9876543210
LPBK
V/C
PC
CCO
OE
0
SAB2
SAB1
SAB0
0
CAB4
CAB3
CAB2
CAB1
CAB0
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