DataSheet.jp

74HC157 の電気的特性と機能

74HC157のメーカーはSTMicroelectronicsです、この部品の機能は「HCT157 QUAD 2 CHANNEL MULTIPLEXER HCT158 QUAD 2 CHANNEL MULTIPLEXER INV.」です。


製品の詳細 ( Datasheet PDF )

部品番号 74HC157
部品説明 HCT157 QUAD 2 CHANNEL MULTIPLEXER HCT158 QUAD 2 CHANNEL MULTIPLEXER INV.
メーカ STMicroelectronics
ロゴ STMicroelectronics ロゴ 




このページの下部にプレビューと74HC157ダウンロード(pdfファイル)リンクがあります。

Total 11 pages

No Preview Available !

74HC157 Datasheet, 74HC157 PDF,ピン配置, 機能
M54HCT157/158
M74HCT157/158
HCT157 QUAD 2 CHANNEL MULTIPLEXER
HCT158 QUAD 2 CHANNEL MULTIPLEXER (INV.)
. HIGH SPEED
tPD = 21 ns (TYP.) AT VCC = 5 V
. LOW POWER DISSIPATION
ICC = 4 µA (MAX.) AT TA = 25 °C
. COMPATIBLE WITH TTL OUTPUTS
VIH = 2V (MIN.) VIL = 0.8V (MAX)
. OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
. SYMMETRICAL OUTPUT IMPEDANCE
IOH= IOL = 4 mA (MIN.)
. BALANCED PROPAGATION DELAYS
tPLH = tPHL
. PIN AND FUNCTION COMPATIBLE
WITH 54/74LS157/158
B1R
(Plastic Package)
F1R
(Ceramic Package)
M 1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M54HCTXXXF1R M74HCTXXXM1R
M74HCTXXXB1R M74HCTXXXC1R
PIN CONNECTIONS (top view)
DESCRIPTION
The M54/74HCT157 and the M54/74HCT158 are
high speed CMOS QUAD 2-CHANNEL MULTI-
PLEXERs fabricated with silicon gate C2MOS tech-
nology. They achieve the high speed operation
similar to equivalent LSTTL while maintaining the
CMOS low power dissipation.
These devices consist of four 2-input digital multi-
plexers with common select and strobe inputs. The
HCT158 is an inverting multiplexer while the
HCT157 is a non-inverting multiplexer. When the
STROBE input is held High, selection of data is in-
hibited and all the outputs become Low in the
M74HCT157 and High in the M74HCT158. The SE-
LECT decoding determines whether the A or B in-
puts get routed to their corresponding Y outputs. All
inputs are equipped with protection circuits against
static discharge and transient excess voltage.
M54/74HCT devices are designed to directly inter-
face HSC2MOS systems with TTL and NMOS com-
ponents. They are also plug in replacements for
LSTTL devices giving a reduction of power con-
sumption.
April 1993
HCT157
HCT158
NC =
No Internal
Connection
1/11

1 Page





74HC157 pdf, ピン配列
TRUTH TABLE
STROBE
H
L
L
L
L
X: DON’T CARE
INPUTS
SELECT
X
L
L
H
H
A
X
L
H
X
X
IEC LOGIC SYMBOL
HCT157
M54/M74HCT157 M54/M74HCT158
OUTPUTS
B
Y (HCT157)
Y (HCT158)
X LH
X LH
XHL
L LH
HH L
HCT158
LOGIC DIAGRAM
HCT157
HCT158
3/11


3Pages


74HC157 電子部品, 半導体
M54/M74HCT157 M54/M74HCT158
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Symbol
Parameter
Test Conditions
VCC
(V)
TA = 25 oC
54HC and 74HC
Min. Typ. Max.
Value
-40 to 85 oC
74HC
Min. Max.
-55 to 125 oC
54HC
Min. Max.
Unit
tTLH Output Transition 4.5
tTHL Time
8 15 19 22 ns
tPLH Propagation
tPHL Delay Time
(A, B - Y)
4.5
16 25 31 38 ns
tPLH Propagation
tPHL Delay Time
(SELECT - Y)
4.5
19 30 38 45 ns
tPLH Propagation
tPHL Delay Time
(STROBE - Y)
4.5
17 27 34 41 ns
CIN Input Capacitance
5 10 10 10 pF
CPD (*) Power Dissipation
Capacitance
HCT157
HCT158
50
60
pF
pF
(*) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.
(Refer to Test Circuit). Average operting current can be obtained by the following equation. ICC(opr) = CPD VCC fIN + ICC/4 (per channel)
SWITCHING CHARACTERISTICS TEST CIR-
CUIT
TEST CIRCUIT ICC (Opr.)
6/11
INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF
SWITCHING CHARACTERISTICS TEST.

6 Page



ページ 合計 : 11 ページ
 
PDF
ダウンロード
[ 74HC157 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。


共有リンク

Link :


部品番号部品説明メーカ
74HC151

8-input multiplexer

Philips
Philips
74HC151-Q100

8-input multiplexer

NXP Semiconductors
NXP Semiconductors
74HC151D

8-Channel Multiplexer

Toshiba
Toshiba
74HC151D-Q100

8-input multiplexer

NXP Semiconductors
NXP Semiconductors


www.DataSheet.jp    |   2020   |  メール    |   最新    |   Sitemap