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PDF M74HC155 Data sheet ( Hoja de datos )
| Número de pieza | M74HC155 | |
| Descripción | DUAL 2 TO 4 LINE DECODER 3 TO 8 LINE DECODER | |
| Fabricantes | ST Microelectronics | |
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M54HC155
M74HC155
DUAL 2 TO 4 LINE DECODER 3 TO 8 LINE DECODER
. HIGH SPEED
tPD = 12 ns (TYP.) AT VCC = 5 V
. LOW POWER DISSIPATION
ICC = 4 µA (MAX.) AT TA = 25 °C
. HIGH NOISE IMMUNITY
VNIH = VNIL = 28 % VCC (MIN.)
. OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
. SYMMETRICAL OUTPUT IMPEDANCE
IOH = IOL = 4 mA (MIN.)
. BALANCED PROPAGATION DELAYS
tPLH = tPHL
. WIDE OPERATING VOLTAGE RANGE
VCC (OPR) = 2 V TO 6 V
. PIN AND FUNCTION COMPATIBLE
WITH 54/74LS155
B1R
(Plastic Package)
F1R
(Ceramic Package)
M 1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M 54HC 15 5F 1R
M 74H C1 55 M1 R
M 74HC 15 5B 1R
M 74H C1 55 C1 R
PIN CONNECTIONS (top view)
DESCRIPTION
The M54/74HC155 is a high speed CMOS DUAL 2-
TO-4 LINE DECODER fabricated in silicon gate
C2MOS technology.
It has the same high speed performance of LSTTL
combined with true CMOS low power consumption.
It features dual 1-TO-4 line demultiplexers with indi-
vidual strobe inputs (1G and 2G), individual data in-
puts (1C and 2C) and common binary address
inputs (A and B).
When both decoders are enabled by the strobes, the
inverted output of 1C data and non-inverted output
of 2C data will be brought to the select output pins
of each sections. A 1-TO-8 line demultiplexer can
also be easily built up by providing a data signal to
both 1C and 2C inputs ; the output order from the
msb is 1Y3, 1Y2, 1Y1, 1Y0, 2Y3, 2Y2, 2Y1, 2Y0.
This device can be used as a 2-to-4 line decoder or
a 3-to-8 line decoder when 1C is held high and 2C
is held low.
All inputs are equipped with protection circuits
against static discharge and transient excess volt-
age.
December 1992
NC =
No Internal
Connection
1/11
1 page  
M54/M74HC155
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 2.0
tTHL Time
4.5
30 75
8 15
95 110
19 22 ns
6.0 7 13 16 19
tPLH Propagation
tPHL Delay Time
2.0
4.5
45 130 165 195
15 26 33 39 ns
6.0 13 22 28 33
CIN Input Capacitance
5 10 10 10 pF
CPD (*) Power Dissipation
Capacitance
53
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
SWITCHING CHARACTERISTICS TEST WAVEFORM
5/11
5 Page 
M54/M74HC155
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use ascritical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectonics.
© 1994 SGS-THOMSON Microelectronics - All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands -
Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A
11/11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet M74HC155.PDF ] | |
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