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PDF M74HC298 Data sheet ( Hoja de datos )
| Número de pieza | M74HC298 | |
| Descripción | QUAD 2 CHANNEL MULTIPLEXER/REGISTER | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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M54HC298
M74HC298
QUAD 2 CHANNEL MULTIPLEXER/REGISTER
. HIGH SPEED
fMAX = 73 MHz (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 54/74LS298
DESCRIPTION
B1R
(Plastic Package)
F1R
(Ceramic Package)
M 1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M 54HC 29 8F 1R
M 74H C2 98 M1 R
M 74HC 29 8B 1R
M 74H C2 98 C1 R
The M54/74HC298 is a high speed CMOS QUAD 2-
CHANNEL MULTIPLEXER/REGISTER fabricated
in silicon gate C2MOS technology.
PIN CONNECTIONS (top view)
It has the same high speed performance of LSTTL
combined with true CMOS low power consumption.
These circuits are controlled by the signals WORD
SELECT and CLOCK. When the WORD SELECT
input is taken low Word 1 (A1, B1, C1 and D1) is
presented to the input of the flip-flops, and when
WORD SELECT is high Word 2 (A2, B2, C2 and D2)
is presented to the inputs of the flip-flops. The select
word is clocked to the output terminals on the nega-
tive edge of the clock pulse. All inputs are equipped
with protection circuits against static discharge and
transient excess voltage.
INPUT AND OUTPUT EQUIVALENT CIRCUIT
October 1992
NC =
No Internal
Connection
1/11
1 page  
M54/M74HC298
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
(CLOCK - Q)
2.0
4.5
6.0
45 125 155 190
15 25 31 38 ns
13 21 26 32
fMAX Maximum Clock 2.0
Frequency
4.5
7 22
35 67
5.6 4.6
28 23 MHz
6.0 41 79 33 25
tW(H)
tW(L)
Minimum Pulse
Width
(CLOCK)
2.0
4.5
6.0
18 75
6 15
6 13
95 110
19 22 ns
16 19
ts Minimum Set-up 2.0
Time
4.5
(A, B, C, D)
6.0
12 50 65 75
3 10 13 15 ns
29
11 13
ts Minimum Set-up 2.0
Time
4.5
(W. S.)
6.0
30 75
8 15
6 13
95 110
19 22 ns
16 19
th Minimum Hold 2.0
Time
4.5
(A, B, C, D)
6.0
25 30 40
5 6 8 ns
457
th Minimum Hold 2.0
Time
4.5
(W. S.)
6.0
000
0 0 0 ns
000
CIN Input Capacitance
5 10 10 10 pF
CPD (*) Power Dissipation
Capacitance
39
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 bit), and the CPD for
operating current can be obtained by the following equation: CPD = 27 + 12 x n
5/11
5 Page 
M54/M74HC298
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 M74HC298.PDF ] | |
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