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PDF M54HC251 Data sheet ( Hoja de datos )

Número de pieza M54HC251
Descripción 8 BIT SIPO SHIFT REGISTER
Fabricantes ST Microelectronics 
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No Preview Available ! M54HC251 Hoja de datos, Descripción, Manual

M54HC251
M74HC251
. HIGH SPEED
tPD = 14 ns (TYP.) AT VCC = 5 V
. LOW POWER DISSIPATION
ICC = 4 µA (MAX.) AT TA = 25 °C 6 V
. 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
54/74LS251
DESCRIPTION
The M54/74HC251 is a high speed CMOS 8-CHAN-
NEL MULTIPLEXER (3-STATE) fabricated in silicon
gate C2MOS technology. It has the same high
speed performance of LSTTL combined with true
CMOS low power consumption. This multiplexer
features both true (Y) and complement (W) outputs
as well as STROBE input. The STROBE must be a
low logic level to enable this device. When the
STROBE input is high, both outputs are in the high
impedance state. When enabled, address informa-
tion on the data select inputs determines which data
input is routed to Y and W. All inputs are equipped
with protection circuits against static discharge and
transient excess voltage.
8 BIT SIPO SHIFT REGISTER
B1R
(Plastic Package)
F1R
(Ceramic Package)
M 1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M 54HC 25 1F 1R
M 74H C2 51 M1 R
M 74HC 25 1B 1R
M 74H C2 51 C1 R
PIN CONNECTIONS (top view)
INPUT AND OUTPUT EQUIVALENT CIRCUIT
February 1993
NC =
No Internal
Connection
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M54HC251 pdf
M54/M74HC251
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
(D - Y, W)
2.0
4.5
6.0
64 130 165 195
16 26 33 39 ns
14 22 28 33
tPLH Propagation
2.0
tPHL Delay Time
4.5
(A, B, C - Y, W) 6.0
80 160 200 240
20 32 40 48 ns
17 27 34 41
tPZL Output Enable
tPZH Time
2.0
4.5 RL = 1 K
36 90
11 18
115 135
23 27 ns
6.0 9 15 20 23
tPLZ Output Disable
2.0
tPHZ Time
4.5 RL = 1 K
26 85
13 17
105 130
21 26 ns
6.0 11 14 18 22
CIN Input Capacitance
5 10 10 10 pF
CPD (*) Power Dissipation
Capacitance
62
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
TEST WAVEFORM ICC (Opr.)
* INPUT WAVEFORM TIME IS THE SAME AS THAT IN CASE OF SWITCHING CHARACTERISTICS TEST.
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M54HC251 arduino
M54/M74HC251
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
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