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Número de pieza | M74HC137 | |
Descripción | 3 TO 8 LINE DECODER/LATCH INVERTING | |
Fabricantes | ST Microelectronics | |
Logotipo | ||
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No Preview Available ! M54HC137
M74HC137
3 TO 8 LINE DECODER/LATCH (INVERTING)
. HIGH SPEED
tPD = 11 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 54/74LS137
DESCRIPTION
B1R
(Plastic Package)
F1R
(Ceramic Package)
M 1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M 54HC 13 7F 1R
M 74H C1 37 M1 R
M 74HC 13 7B 1R
M 74H C1 37 C1 R
The M54/74HC137 is a high speed CMOS 3 TO 8LINE
DECODER/LATCH (INVERTING) fabricated in silicon
gate C2MOS technology. It has the same high speed
performance of LSTTL combined with true CMOS low
power consumption. This device is a 3 to 8line decoder
withlatches on thethree address inputs. When GL goes
from low tohigh, theaddress present at theselect inputs
(A, B and C) is stored in the latches. As long as GL re-
mains high no address changes will be recognized. Out-
put enable pins G1 and G2, control the state of the
outputs independently of the select or latch-enable in-
puts. All the outputs are high unless G1 is high and G2
is low. The HC137 is ideally suited for the implementa-
tion of glitch-free decoders in stored-address applica-
tions in bus oriented systems. All inputs are equipped
withprotection circuits against staticdischarge and tran-
sient excess voltage.
PIN CONNECTIONS (top view)
INPUT AND OUTPUT EQUIVALENT CIRCUIT
February 1993
NC =
No Internal
Connection
1/11
1 page M54/M74HC137
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
(G1 - Y)
2.0
4.5
6.0
45 115 145 175
14 23 29 35 ns
12 20 25 30
tPLH Propagation
tPHL Delay Time
(G2 - Y)
2.0
4.5
6.0
50 115 145 175
15 23 29 35 ns
13 20 25 30
tPLH Propagation
tPHL Delay Time
(GL - Y)
2.0
4.5
6.0
70 170 215 250
22 34 43 50 ns
19 29 37 43
tPLH Propagation
tPHL Delay Time
(A, B, C - Y)
2.0
4.5
6.0
70 165 205 110
21 33 41 22 ns
18 28 35 19
tW(L) Minimum Pulse
Width
(GL)
2.0
4.5
6.0
12 50 65 75
3 10 13 15 ns
39
11 13
ts Minimum Set-up 2.0
Time
(A, B, C - GL)
4.5
6.0
8 50 60 75
2 10 12 15 ns
29
10 13
th Minimum Hold 2.0
Time
4.5
(A, B, C - GL)
6.0
555
5 5 5 ns
555
CIN
CPD (*)
Input Capacitance
Power Dissipation
Capacitance
5 10 10 10 pF
55 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
5/11
5 Page M54/M74HC137
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 M74HC137.PDF ] |
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