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HD74BC640A の電気的特性と機能

HD74BC640AのメーカーはHitachi Semiconductorです、この部品の機能は「Octal Bus Transceivers With 3 State Outputs」です。


製品の詳細 ( Datasheet PDF )

部品番号 HD74BC640A
部品説明 Octal Bus Transceivers With 3 State Outputs
メーカ Hitachi Semiconductor
ロゴ Hitachi Semiconductor ロゴ 




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HD74BC640A Datasheet, HD74BC640A PDF,ピン配置, 機能
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
L
L
H
H : High level
L : Low level
X : Immaterial
DIR
L
H
X
Operation
B data to A bus
A data to B bus
Isolation

1 Page





HD74BC640A pdf, ピン配列
Recommended Operating Conditions
Item
Symbol
Min
Typ
Supply voltage
Input voltage
Ouput voltage
Operating temperature
VCC
VIN
VOUT
Topr
4.5
0
0
–40
5.0
Input rise/fall time*1
tr, tf
0
Note: 1. This item guarantees maximum limit when one input switches.
Waveform: Refer to test circuit of switching characteristics.
Max
5.5
VCC
VCC
85
8
HD74BC640A
Unit
V
V
V
°C
ns/V
Logic Diagram
DiR
A1
A2
A3
A4
A5
A6
A7
A8
G
B1
B2
B3
B4
B5
B6
B7
B8
3


3Pages


HD74BC640A 電子部品, 半導体
HD74BC640A
Test Circuit
VCC
Input
Pulse
Generator
Zout = 50
VCC
G
A1 S1
B1
Output
CL =
50 pF
500
450
50
Scope
DIR
OPEN *4
7V
Notes:
1. CL includes probe and jig capacitance.
2. A2-B2 to A8-B8 are identical to above load circuit.
3. S1: Input-Output change switch.
4. Open: tPLH, tPHL, tZH tHZ
7 V: tZL, tLZ
Waveforms-1
Input
Output
tf
90 %
1.5 V
10 %
tPLH
1.5 V
tr
90 %
1.5 V
10 %
tPHL
1.5 V
3V
0V
VOH
VOL
6

6 Page



ページ 合計 : 9 ページ
 
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部品番号部品説明メーカ
HD74BC640A

Octal Bus Transceivers With 3 State Outputs

Hitachi Semiconductor
Hitachi Semiconductor


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