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参数资料
| 型号： | 74LCXH16244MTDX |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 6/9页 |
| 文件大小： | 0K |
| 描述： | IC BUFF DVR 16BIT LOW V 48TSSOP |
| 标准包装： | 1,000 |
| 系列： | 74LCXH |
| 逻辑类型： | 缓冲器/线路驱动器，非反相 |
| 元件数： | 4 |
| 每个元件的位元数： | 4 |
| 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： | 48-TFSOP（0.240"，6.10mm 宽） |
| 供应商设备封装： | 48-TSSOP |
| 包装： | 带卷 (TR) |
6
COMMERCIALTEMPERATURERANGE
IDT72V70180 3.3V TIME SLOT INTERCHANGE
DIGITAL SWITCH 128 x 128
Connection Memory
10000001
10000010
Data Memory
0
1
0
2
1
3
Stream
Control Register
CRb7
5716 drw03
10000000
The Control Register is only accessed when A7-A0
are all zeroed. When A7 =1, up to 32 bytes are
randomly accessable via A0-A4 at any one instant.
Of which stream these bytes (channels) are accessed
is determined by the state of CRb1 -CRb0.
CRb6CRb5CRb4CRb3CRb2CRb1CRb0
CRb1CRb0
0
1
CRb4
10011111
External Address Bits A7-A0
Channel 0
Channel 1
Channel 2
Channel 0
Channel 1
Channel 2
Channel 0
Channel 1
Channel 2
Channel 0
Channel 1
Channel 2
Channel 31
Figure 3. Addressing Internal Memories
If the LPBK bit is high, the associated TX output channel data is internally
looped back to the RX input channel (i.e., RX n channel m data comes from the
TX n channel m). If the LPBK bit is low, the loopback feature is disabled. For
proper per-channel loopback operation, the contents of the frame delay offset
registers must be set to zero.
INITIALIZATION OF THE IDT72V70180
After power up, the state of the connection memory is unknown. As such,
theoutputsshouldbeputinhighimpedancebyholdingtheODElow. Whilethe
ODE is low, the microprocessor can initialize the device, program the active
paths, and disable unused outputs by programming the OE bit in connection
memory. Once the device is configured, the ODE pin (or OSB bit depending
on initialization) can be switched.
CONNECTION MEMORY CONTROL
If the ODE pin or the OSB bit is high, the OE bit of each connection memory
location controls the output drivers-enables (if high) or disables (if low). See
Table 4 for detail.
Theprocessorchannel(PC)bitoftheconnectionmemoryselectsbetween
Processor Mode and Connection Mode. If high, the contents of the connection
memoryareoutputontheTXstreams. Iflow,thestreamaddressbit(SAB)and
the channel address bit (CAB) of the connection memory defines the source
information(streamandchannel)ofthetime-slotthatwillbeswitchedtotheoutput
from data memory.
The
V/C(Variable/ConstantDelay)bitineachconnectionmemorylocation
allows the per-channel selection between variable and constant throughput
delay modes.
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| 74LCXH16245G | 功能描述:总线收发器 Transcvr w/Bushold LV 16Bit Bidirect RoHS:否 制造商:Fairchild Semiconductor 逻辑类型:CMOS 逻辑系列:74VCX 每芯片的通道数量:16 输入电平:CMOS 输出电平:CMOS 输出类型:3-State 高电平输出电流:- 24 mA 低电平输出电流:24 mA 传播延迟时间:6.2 ns 电源电压-最大:2.7 V, 3.6 V 电源电压-最小:1.65 V, 2.3 V 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-48 封装:Reel |
| 74LCXH16245GX | 功能描述:总线收发器 Transcvr w/Bushold LV 16Bit Bidirect RoHS:否 制造商:Fairchild Semiconductor 逻辑类型:CMOS 逻辑系列:74VCX 每芯片的通道数量:16 输入电平:CMOS 输出电平:CMOS 输出类型:3-State 高电平输出电流:- 24 mA 低电平输出电流:24 mA 传播延迟时间:6.2 ns 电源电压-最大:2.7 V, 3.6 V 电源电压-最小:1.65 V, 2.3 V 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-48 封装:Reel |
| 74LCXH16245MTD | 功能描述:总线收发器 16-Bit Transceiver Bidirectional RoHS:否 制造商:Fairchild Semiconductor 逻辑类型:CMOS 逻辑系列:74VCX 每芯片的通道数量:16 输入电平:CMOS 输出电平:CMOS 输出类型:3-State 高电平输出电流:- 24 mA 低电平输出电流:24 mA 传播延迟时间:6.2 ns 电源电压-最大:2.7 V, 3.6 V 电源电压-最小:1.65 V, 2.3 V 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-48 封装:Reel |
| 74LCXH16245MTDX | 功能描述:总线收发器 Transcvr w/Bushold LV 16Bit Bidirect RoHS:否 制造商:Fairchild Semiconductor 逻辑类型:CMOS 逻辑系列:74VCX 每芯片的通道数量:16 输入电平:CMOS 输出电平:CMOS 输出类型:3-State 高电平输出电流:- 24 mA 低电平输出电流:24 mA 传播延迟时间:6.2 ns 电源电压-最大:2.7 V, 3.6 V 电源电压-最小:1.65 V, 2.3 V 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-48 封装:Reel |
| 74LCXH16245TTR | 功能描述:总线收发器 16-Bit Bus Tranceivr RoHS:否 制造商:Fairchild Semiconductor 逻辑类型:CMOS 逻辑系列:74VCX 每芯片的通道数量:16 输入电平:CMOS 输出电平:CMOS 输出类型:3-State 高电平输出电流:- 24 mA 低电平输出电流:24 mA 传播延迟时间:6.2 ns 电源电压-最大:2.7 V, 3.6 V 电源电压-最小:1.65 V, 2.3 V 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-48 封装:Reel |
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