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Número de pieza | HD74BC540A | |
Descripción | Octal Buffers/Line Drivers With 3 State Outputs | |
Fabricantes | Hitachi Semiconductor | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de HD74BC540A (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
No Preview Available ! HD74BC540A
Octal Buffers/Line Drivers With 3 State Outputs
ADE-205-031 (Z)
Rev. 0
June 1993
Description
The HD74BC540A 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 inverter drivers with
three state outputs in a 20 pin package. When G1 and G2 is low level, this drivers set up output is enable.
Features
• Input/Output are at high impedance state when power supply is off.
• Built in input pull up circuit can make input pins be open, when not used.
• Input is TTL level.
• Wide operating temperature range
Ta = –40 to +85°C
Function Table
Inputs
G1 G2
LL
LL
HX
XH
H : High level
L : Low level
X : Immaterial
Z : High impedance
A
L
H
X
X
Output Y
H
L
Z
Z
1 page Switching Characteristics (CL = 50 pF)
Item
Propagation delay time
Output enable time
Output disable time
Input capacitance
Output capacitance
Symbol
Ta = 25°C
VCC = 5.0 V
Min Max
tPLH 3.0 6.0
tPHL 3.0 6.0
tZH 3.0 9.0
tZL 3.0 9.0
tHZ 3.0 8.0
tLZ 3.0 8.0
CIN 3.0(Typ)
CO 15.0(Typ)
HD74BC540A
Ta = –40 to +85°C
VCC = 5.0 V ±10
Min Max
Unit
Test Conditions
3.0 7.0 ns See under figure
3.0 7.0
3.0 11.0 ns
3.0 11.0
3.0 10.0 ns
3.0 10.0
— pF VIN = VCC or GND
— pF VO = VCC or GND
Test circuit
VCC
Input
Pulse
Generator
Zout = 50Ω
VCC
G1
Output
A1
G2
Y1
CL =
50 pF
500Ω
450Ω
50Ω
Scope
*3
OPEN
7V
Notes:
1. CL includes probe and jig capacitance.
2. A2-Y2 to A8-Y8 are identical to above load circuit.
3. Open: tPLH, tPHL, tZH, tHZ
7V: tZL, tLZ
5
5 Page |
Páginas | Total 8 Páginas | |
PDF Descargar | [ Datasheet HD74BC540A.PDF ] |
Número de pieza | Descripción | Fabricantes |
HD74BC540A | Octal Buffers/Line Drivers With 3 State Outputs | Hitachi Semiconductor |
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