M54/M74HC257
M54/M74HC258
HC257 QUAD 2 CHANNEL MULTIPLEXER (3-STATE)
HC258 QUAD 2 CHANNEL MULTIPLEXER (3-STATE, INVERTING)
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HIGH SPEED
t
PD
= 10 ns (TYP.) at V
CC
= 5 V
LOW POWER DISSIPATION
I
CC
= 4
µA
(MAX.) at T
A
= 25
°C
HIGH NOISE IMMUNITY
V
NIH
= V
NIL
= 28 % V
CC
(MIN.)
OUTPUT DRIVE CAPABILITY
15 LSTTL LOADS
SYMMETRICAL OUTPUT IMPEDANCE
IOH
= I
OL
= 6 mA (MIN.)
BALANCED PROPAGATION DELAYS
t
PLH
= t
PHL
WIDE OPERATING VOLTAGE RANGE
V
CC
(OPR) = 2 V to 6 V
PIN AND FUNCTION COMPATIBLE
WITH 54/74LS257/258
B1R
(Plastic Package)
F1R
(Ceramic Package)
M1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M54HCXXXF1R
M74HCXXXM1R
M74HCXXXB1R
M74HCXXXC1R
PIN CONNECTIONS
(top view)
HC257
DESCRIPTION
The M54/74HC257 and the M54/74HC258 are high
speed CMOS MULTIPLEXERs fabricated with sili-
2
con gate C MOS technology.
They have the same high speed performance of
LSTTL combined with true CMOS low power con-
sumption.
These IC’s are composed of an independent 2-
channel multiplexer with common SELECT and EN-
ABLE INPUT.
The M54/74HC258 is an inverting multiplexer while
the M54/74HC257 is a non-inverting multiplexer.
When the ENABLE INPUT is held ”High”, outputs of
both IC’s become high-impedance state. If SELECT
INPUT is held ”Low”, ”A” data is selected, when SE-
LECT INPUT is high ”H”, ”B” data is chosen.
All inputs are equipped with protection circuits
against static discharge and transient excess volt-
age.
October 1992
HC258
1/12
M54/M74HC257/258
INPUT AND OUTPUT EQUIVALENT CIRCUIT
CHIP CARRIER
HC257
HC258
NC = No Internal Connection
PIN DESCRIPTION
(HC257)
PIN No
1
2, 5, 14, 11
3, 6, 13, 10
4, 7, 12, 9
15
8
16
SYMBOL
SELECT
1A to 4A
1B to 4B
1Y to 4Y
OE
GND
V
CC
NAME AND FUNCTION
Common Data Select
Input
Data Input From Source A
Data Inputs from Source B
3 State Multiplexer
Outputs
3 State Output Enable
Inputs (Active LOW)
Ground (0V)
Positive Supply Voltage
PIN DESCRIPTION
(HC258)
PIN No
1
2, 5, 14, 11
3, 6, 13, 10
4, 7, 12, 9
15
8
16
SYMBOL
SELECT
1A to 4A
1B to 4B
1Y to 4Y
OE
GND
V
CC
NAME AND FUNCTION
Common Data Select
Input
Data Input From Source A
Data Inputs from Source B
3 State Multiplexer
Outputs
3 State Output Enable
Inputs (Active LOW)
Ground (0V)
Positive Supply Voltage
2/12
M54/M74HC257/258
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
V
I
V
O
I
IK
I
OK
I
O
I
CC
or I
GND
P
D
T
stg
T
L
Supply Voltage
DC Input Voltage
DC Output Voltage
DC Input Diode Current
DC Output Diode Current
DC Output Source Sink Current Per Output Pin
DC V
CC
or Ground Current
Power Dissipation
Storage Temperature
Lead Temperature (10 sec)
Parameter
Value
-0.5 to +7
-0.5 to V
CC
+ 0.5
-0.5 to V
CC
+ 0.5
±
20
±
20
±
35
±
70
500 (*)
-65 to +150
300
Unit
V
V
V
mA
mA
mA
mA
mW
o
o
C
C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition isnotimplied.
(*) 500 mW:
≅
65
o
C derate to 300 mW by 10mW/
o
C: 65
o
C to 85
o
C
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
I
V
O
T
op
t
r
, t
f
Parameter
Supply Voltage
Input Voltage
Output Voltage
Operating Temperature:
M54HC
Series
M74HC
Series
Input Rise and Fall Time
Value
2 to 6
0 to V
CC
0 to V
CC
-55 to +125
-40 to +85
0 to 1000
0 to 500
0 to 400
Unit
V
V
V
C
o
C
ns
o
V
CC
= 2 V
V
CC
= 4.5 V
V
CC
= 6 V
4/12
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