SGS-THOMSON M54HC157, M54HC158, M74HC157, M74HC158 Technical data

HC157

M54HC157/158

M74HC157/158

HC157 QUAD 2 CHANNEL MULTIPLEXER

HC158 QUAD 2 CHANNEL MULTIPLEXER (INV.)

.HIGH SPEED

.tPD = 10 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 54/74LS157/158

DESCRIPTION

The M54/74HC157 and the M54/74HC158 are high speed CMOS QUAD 2-CHANNEL MULTIPLEXER's fabricated with silicon gate C2MOS technology. They achieve the high speed operation similar to equivalent LSTTL while maintaining the CMOS low power dissipation.

These devices consist of four 2-input digital multiplexers with common select and strobe inputs. The HC158 is an inverting multiplexer while the HC157 is a non-inverting multiplexer. When the STROBE input is held High, selection of data is inhibited and all the outputs become Low in the M74HC157 and High in the M74HC158. The SELECT decoding determines whether the A or B inputs get routed to their corresponding Y outputs. All inputs are equipped with protection circuits against static discharge and transient excess voltage.

B1R	F1R
(Plastic Package)	(Ceramic Package)

M1R	C1R
(Micro Package)	(Chip Carrier)
ORDER CODES :
M54HCXXXF1R	M74HCXXXM1R
M74HCXXXB1R	M74HCXXXC1R

PIN CONNECTIONS (top view)

HC157

HC158

NC =

No Internal

Connection

February 1993

1/11

M54/M74HC157 M54/M74HC158

CHIP CARRIER

HC157

HC158

INPUT AND OUTPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION (for HC157)			PIN DESCRIPTION (for HC158)
PIN No	SYMBOL	NAME AND FUNCTION	PIN No	SYMBOL	NAME AND FUNCTION
1	SELECT	Common Data Select	1	SELECT	Common Data Select
		Input			Input
2, 5, 11, 14	1A to 4A	Data Inputs From	2, 5, 11, 14	1A to 4A	Data Inputs From
		Source A			Source A
3, 6, 10, 13	1B to 4B	Data Inputs From	3, 6, 10, 13	1B to 4B	Data Inputs From
		Source B			Source B
4, 7, 9, 12	1Y to 4Y	Multiplexer Output	4, 7, 9, 12	1Y to 4Y	Multiplexer Output
15	STROBE	Strobe Input	15	STROBE	Strobe Input
8	GND	Ground (0V)	8	GND	Ground (0V)
16	VCC	Positive Supply Voltage	16	VCC	Positive Supply Voltage

2/11

M54/M74HC157 M54/M74HC158

TRUTH TABLE

		INPUTS		OUTPUTS
STROBE	SELECT	A	B	Y (HC157)	Y (HC158)
H	X	X	X	L	H
L	L	L	X	L	H
L	L	H	X	H	L
L	H	X	L	L	H
L	H	X	H	H	L
X: DON'T CARE
IEC LOGIC SYMBOL
	HC157			HC158

LOGIC DIAGRAM

HC157

HC158

3/11

M54/M74HC157 M54/M74HC158

ABSOLUTE MAXIMUM RATINGS

Symbol	Parameter	Value	Unit
VCC	Supply Voltage	-0.5 to +7	V
VI	DC Input Voltage	-0.5 to VCC + 0.5	V
VO	DC Output Voltage	-0.5 to VCC + 0.5	V
IIK	DC Input Diode Current	± 20	mA
IOK	DC Output Diode Current	± 20	mA
IO	DC Output Source Sink Current Per Output Pin	± 25	mA
ICC or IGND	DC VCC or Ground Current	± 50	mA
PD	Power Dissipation	500 (*)	mW
Tstg	Storage Temperature	-65 to +150	oC
TL	Lead Temperature (10 sec)	300	oC

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition isnotimplied.

(*) 500 mW: 65 oC derate to 300 mW by 10mW/oC: 65 oC to 85 oC

RECOMMENDED OPERATING CONDITIONS

Symbol	Parameter		Value	Unit
VCC	Supply Voltage		2 to 6	V
VI	Input Voltage		0 to VCC	V
VO	Output Voltage		0 to VCC	V
Top	Operating Temperature: M54HC Series		-55 to +125	oC
	M74HC Series		-40 to +85	oC
tr, tf	Input Rise and Fall Time	VCC = 2 V	0 to 1000	ns
		VCC = 4.5 V	0 to 500
		VCC = 6 V	0 to 400

4/11