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参数资料
| 型号： | HD74BC640A |
| 厂商： | Hitachi,Ltd. |
| 英文描述： | Octal Bus Transceivers With 3 State Outputs(三态输出的八总线收发器) |
| 中文描述： | 八路总线收发器与三态输出（三态输出的八总线收发器） |
| 文件页数： | 1/9页 |
| 文件大小： | 44K |
| 代理商： | HD74BC640A |
HD74BC640A
Octal Bus Transceivers With 3 State Outputs
ADE-205-026 (Z)
Rev.0
June 1993
Description
The HD74BC640A provides high drivability and operation equal to or better than high speed bipolar
standard logic IC by using Bi-CMOS process. The device features low power dissipation that is about 1/5
of high speed bipolar logic IC. When the frequency is 10 MHz. The device has eight bus transceivers with
three state outputs in a 20 pin package. Each device has an active low enable input (
G
) and a direction
control input, DiR. When DiR is high, data flows from the A inputs to the B outputs. When DiR is high,
data flows from the B inputs to the A outputs. When enable inputs (
G
) is high, disables both A and B ports
by placing then in a high impedance.
Features
Input/Output are at high impedance state when power supply is off.
Input pins can be open, when not used, owing to built in input pull up circuit.
Input is TTL level.
Wide operating temperature range
Ta = –40 to +85°C.
Function Table
Control Inputs
G
DIR
Operation
B
data to A bus
A
data to B bus
L
L
L
H
H
H :
L
X :
X
Isolation
High level
Low level
Immaterial
:
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相关代理商/技术参数 |
参数描述 |
|---|---|
| HD74BC640AFP | 制造商:未知厂家 制造商全称:未知厂家 功能描述:BUS TRANSCEIVER|SINGLE|8-BIT|BICMOS-TTL|SOP|20PIN|PLASTIC |
| HD74BC640AFPEL | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:Octal Bus Transceivers With 3 State Outputs |
| HD74BC640AP | 制造商:未知厂家 制造商全称:未知厂家 功能描述:BUS TRANSCEIVER|SINGLE|8-BIT|BICMOS-TTL|DIP|20PIN|PLASTIC |
| HD74BC640ARP | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Bus Transceiver |
| HD74BC640AT | 制造商:未知厂家 制造商全称:未知厂家 功能描述:BUS TRANSCEIVER|SINGLE|8-BIT|BICMOS-TTL|TSSOP|20PIN|PLASTIC |
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