STMICROELECTRONICS M74HC298M1R

M74HC298
QUAD 2 CHANNEL MULTIPLEXER/REGISTER
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HIGH SPEED:
fMAX = 79 MHz (TYP.) at VCC = 6V
LOW POWER DISSIPATION:
ICC = 4µA(MAX.) at TA=25°C
HIGH NOISE IMMUNITY:
VNIH = V NIL = 28 % VCC (MIN.)
SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 4mA (MIN)
BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
WIDE OPERATING VOLTAGE RANGE:
VCC (OPR) = 2V to 6V
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 298
DESCRIPTION
The M74HC298 is an high speed CMOS QUAD 2
CHANNEL MULTIPLEXER/REGISTER fabricated
with silicon gate C2MOS technology.
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
DIP
SOP
TSSOP
ORDER CODES
PACKAGE
TUBE
DIP
SOP
TSSOP
M74HC298B1R
M74HC298M1R
T&R
M74HC298RM13TR
M74HC298TTR
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 negative edge of the clock pulse.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
July 2001
1/11
M74HC298
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
SYMBOL
1, 2, 5, 6
11
A2, B2, C2,
D2
A1, B1, C1,
D1
QA to QD
WORD
SELECT
CLOCK
8
16
GND
VCC
3, 4, 7, 9
12 to 15
10
NAME AND FUNCTION
Word 2 Data Inputs
Word 1 Data Inputs
Outputs
Word Select Input
Clock Input (LOW to
HIGH, Edge-triggered)
Ground (0V)
Positive Supply Voltage
TRUTH TABLE
INPUTS
WORD SELECT
OUTPUTS
CLOCK
QA
QB
QC
QD
L
a1
b1
c1
d1
H
a2
b2
c2
d2
X
QA0
QB0
QC0
QD0
X : Don’t Care
a1, a2, ETC. : The level of steady state input at a1, a2, etc.
QA0, QB0, ETC. : The level of QA, QB, ETC entered on the most recent negative transition of the clock input.
LOGIC DIAGRAM
This logic diagram has not be used to estimate propagation delays
2/11
M74HC298
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
Parameter
Value
Supply Voltage
Unit
-0.5 to +7
V
-0.5 to VCC + 0.5
-0.5 to VCC + 0.5
V
DC Input Diode Current
± 20
mA
IOK
DC Output Diode Current
± 20
mA
IO
DC Output Current
± 25
mA
± 50
mA
VI
DC Input Voltage
VO
DC Output Voltage
IIK
ICC or IGND DC VCC or Ground Current
PD
Power Dissipation
Tstg
Storage Temperature
TL
Lead Temperature (10 sec)
V
500(*)
mW
-65 to +150
°C
300
°C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied
(*) 500mW at 65 °C; derate to 300mW by 10mW/°C from 65°C to 85°C
RECOMMENDED OPERATING CONDITIONS
Symbol
VCC
Parameter
Value
Supply Voltage
Unit
2 to 6
V
VI
Input Voltage
0 to VCC
V
VO
Output Voltage
0 to VCC
V
Top
Operating Temperature
-55 to 125
°C
Input Rise and Fall Time
tr, tf
VCC = 2.0V
0 to 1000
ns
VCC = 4.5V
0 to 500
ns
VCC = 6.0V
0 to 400
ns
3/11
M74HC298
DC SPECIFICATIONS
Test Condition
Symbol
VIH
VIL
VOH
VOL
II
ICC
4/11
Parameter
High Level Input
Voltage
Low Level Input
Voltage
High Level Output
Voltage
Low Level Output
Voltage
Input Leakage
Current
Quiescent Supply
Current
Value
TA = 25°C
VCC
(V)
Min.
2.0
4.5
6.0
2.0
4.5
6.0
Typ.
Max.
1.5
3.15
4.2
-40 to 85°C
-55 to 125°C
Min.
Min.
Max.
1.5
3.15
4.2
0.5
1.35
1.8
Max.
1.5
3.15
4.2
0.5
1.35
1.8
V
0.5
1.35
1.8
2.0
IO=-20 µA
1.9
2.0
1.9
1.9
4.5
IO=-20 µA
4.4
4.5
4.4
4.4
6.0
IO=-20 µA
5.9
6.0
5.9
5.9
4.5
IO=-4.0 mA
4.18
4.31
4.13
4.10
5.68
Unit
V
V
6.0
IO=-5.2 mA
2.0
IO=20 µA
0.0
0.1
0.1
0.1
4.5
IO=20 µA
0.0
0.1
0.1
0.1
6.0
IO=20 µA
0.0
0.1
0.1
0.1
4.5
IO=4.0 mA
0.17
0.26
0.33
0.40
6.0
IO=5.2 mA
0.18
0.26
0.33
0.40
6.0
VI = VCC or GND
± 0.1
±1
±1
µA
6.0
VI = VCC or GND
4
40
80
µA
5.8
5.63
5.60
V
M74HC298
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns)
Test Condition
Symbol
Parameter
tTLH tTHL Output Transition
Time
tPLH tPHL Propagation Delay
Time (CLOCK - Q)
fMAX
tW(H)
tW(L)
tS
tS
tH
tH
Maximum Clock
Frequency
Minimum Pulse
Width (CLOCK)
Minimum Set-up
Time (A, B, C, D to
CLOCK)
Minimum Set-up
Time (W. S. to
CLOCK)
Minimum Hold
Time (A, B, C, D to
CLOCK)
Minimum Hold
Time (W. S. to
CLOCK)
Value
TA = 25°C
VCC
(V)
Min.
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
7
35
41
Typ.
Max.
30
8
7
45
15
13
22
67
79
18
6
6
12
3
2
30
8
6
75
15
13
125
25
21
-40 to 85°C
-55 to 125°C
Min.
Min.
Max.
95
19
16
155
31
26
5.6
28
33
75
15
13
50
10
9
75
15
13
25
5
4
0
0
0
Max.
110
22
19
190
38
32
4.6
23
25
95
19
16
65
13
11
95
19
16
30
6
5
0
0
0
Unit
ns
ns
MHz
110
22
19
75
15
13
110
22
19
40
8
7
0
0
0
ns
ns
ns
ns
ns
CAPACITIVE CHARACTERISTICS
Test Condition
Symbol
Parameter
VCC
(V)
Value
TA = 25°C
Typ.
Max.
CIN
Input Capacitance
5.0
Min.
5
10
CPD
Power Dissipation
Capacitance (note
1)
5.0
39
-40 to 85°C
-55 to 125°C
Min.
Min.
Max.
10
Unit
Max.
10
pF
pF
1) 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 operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x 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
M74HC298
TEST CIRCUIT
CL = 50pF or equivalent (includes jig and probe capacitance)
RT = ZOUT of pulse generator (typically 50Ω)
WAVEFORM 1 : PROPAGATION DELAY TIME, MINIMUM PULSE WIDTH (CLOCK)
f=1MHz; 50% duty cycle)
6/11
M74HC298
WAVEFORM 2 : MINIMUM SETUP AND HOLD TIME (f=1MHz; 50% duty cycle)
7/11
M74HC298
Plastic DIP-16 (0.25) MECHANICAL DATA
mm.
inch
DIM.
MIN.
a1
0.51
B
0.77
TYP
MAX.
MIN.
TYP.
MAX.
0.020
1.65
0.030
0.065
b
0.5
0.020
b1
0.25
0.010
D
20
0.787
E
8.5
0.335
e
2.54
0.100
e3
17.78
0.700
F
7.1
0.280
I
5.1
0.201
L
Z
3.3
0.130
1.27
0.050
P001C
8/11
M74HC298
SO-16 MECHANICAL DATA
DIM.
mm.
MIN.
TYP
A
a1
inch
MAX.
MIN.
TYP.
1.75
0.1
0.068
0.2
a2
MAX.
0.003
0.007
1.65
0.064
b
0.35
0.46
0.013
0.018
b1
0.19
0.25
0.007
0.010
C
0.5
0.019
c1
45° (typ.)
D
9.8
10
0.385
0.393
E
5.8
6.2
0.228
0.244
e
1.27
0.050
e3
8.89
0.350
F
3.8
4.0
0.149
0.157
G
4.6
5.3
0.181
0.208
L
0.5
1.27
0.019
0.050
M
S
0.62
0.024
8° (max.)
PO13H
9/11
M74HC298
TSSOP16 MECHANICAL DATA
mm.
inch
DIM.
MIN.
TYP
A
MAX.
MIN.
TYP.
MAX.
1.2
A1
0.05
A2
0.8
b
0.047
0.15
0.002
0.004
0.006
1.05
0.031
0.039
0.041
0.19
0.30
0.007
0.012
c
0.09
0.20
0.004
0.0089
D
4.9
5
5.1
0.193
0.197
0.201
E
6.2
6.4
6.6
0.244
0.252
0.260
E1
4.3
4.4
4.48
0.169
0.173
0.176
1
e
0.65 BSC
K
0°
L
0.45
A
0.60
0.0256 BSC
8°
0°
0.75
0.018
8°
0.024
0.030
A2
A1
b
e
K
c
L
E
D
E1
PIN 1 IDENTIFICATION
1
0080338D
10/11
M74HC298
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consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
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11/11