|
|
HD74BC240AのメーカーはHitachi Semiconductorです、この部品の機能は「Octal Buffers/Line Drivers With 3 State Outputs」です。 |
部品番号 | HD74BC240A |
| |
部品説明 | Octal Buffers/Line Drivers With 3 State Outputs | ||
メーカ | Hitachi Semiconductor | ||
ロゴ | |||
このページの下部にプレビューとHD74BC240Aダウンロード(pdfファイル)リンクがあります。 Total 8 pages
HD74BC240A
Octal Buffers/Line Drivers With 3 State Outputs
ADE-205-006A(Z)
2nd Edition
March 1993
Description
The HD74BC240A 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. This device is a non inverting buffer and has two active low
enables (1G and 2G). Each enable independently controls 4 buffers.
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.
• TTL level input
• Wide operating temperature range
Ta = –40 to + 85°C
Function Table
Inputs
G
H
L
L
H : High level
L : Low level
X : Immaterial
Z : High impedance
A
X
H
L
Output Y
Z
L
H
1 Page Recommended Operating Conditions
Item
Symbol
Min
Typ
Supply voltage
Input voltage
Output 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
HD74BC240A
Unit
V
V
V
°C
ns/V
Logic Diagram
1G
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
2G
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
3
3Pages HD74BC240A
Waveforms-1
Input A
tf
90%
1.5 V
10%
tPLH
10%
tr
90%
1.5 V
t PHL
Output Y
1.5 V
Notes:
1. tr = 2.5 ns, tf = 2.5 ns
2. Input waveform: PRR =1 MHz, duty cycle 50%
Waveforms-2
1.5 V
3V
0V
VOH
VOL
Input G
Waveform–A
tf
90%
1.5 V
10%
t ZL
1.5 V
t ZH
tr
90%
1.5 V
10%
t LZ
VOL + 0.3 V
t HZ
3V
0V
3.5 V
VOL
Waveform–B
1.5 V
VOH – 0.3 V
VOH
Notes:
0V
1. tr = 2.5 ns, tf = 2.5 ns
2. Input waveform: PRR = 1 MHz, duty cycle 50%
3. Waveform-A shows input conditions such that the output is “L” level when enable by the
output control.
4. Waveform-B shows input conditions such that the output is “H” level when enable by the
output control.
6
6 Page | |||
ページ | 合計 : 8 ページ | ||
|
PDF ダウンロード | [ HD74BC240A データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
HD74BC240A | Octal Buffers/Line Drivers With 3 State Outputs | Hitachi Semiconductor |