Motorola MC74LCX257M, MC74LCX257DT, MC74LCX257DTR2, MC74LCX257D, MC74LCX257DR2 Datasheet
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SEMICONDUCTOR TECHNICAL DATA
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The MC74LCX257 is a high performance, quad 2–input multiplexer
with 3–state outputs operating from a 2.7 to 3.6V supply . High impedance
TTL compatible inputs significantly reduce current loading to input drivers
while TTL compatible outputs offer improved switching noise
performance. A VI specification of 5.5V allows MC74LCX257 inputs to be
safely driven from 5V devices.
Four bits of data from two sources can be selected using the Select
input. The four outputs present the selected data in the true
(non–inverted) form. The outputs may be switched to a high impedance
state by placing a logic HIGH on the Output Enable (OE
drive capability is 24mA at the outputs.
) input. Current
LOW–VOLTAGE CMOS
QUAD 2–INPUT MULTIPLEXER
D SUFFIX
16
1
PLASTIC SOIC
CASE 751B–05
• Designed for 2.7 to 3.6V V
Operation
CC
• 5V Tolerant — Interface Capability With 5V TTL Logic
• Supports Live Insertion and Withdrawal
• I
Specification Guarantees High Impedance When VCC = 0V
OFF
• LVTTL Compatible
• LVCMOS Compatible
• 24mA Balanced Output Sink and Source Capability
• Near Zero Static Supply Current in All Three Logic States (10µA)
Substantially Reduces System Power Requirements
• Latchup Performance Exceeds 500mA
• ESD Performance: Human Body Model >2000V; Machine Model >200V
Pinout: 16–Lead Plastic Package
(Top View)
V
CC
S I0a I1a Za I0b I1b Zb GND
I0c I1c Zc I0d I1d Zd
OE
1516 14 13 12 11 10
21 34567
9
8
16
16
16
PIN NAMES
Pins
I0n
I1n
OE
S
Zn
PLASTIC SOIC EIAJ
1
PLASTIC SSOP
1
PLASTIC TSSOP
1
Function
Source 0 Data Inputs
Source 1 Data Inputs
Output Enable Input
Select Input
Outputs
M SUFFIX
CASE 966–01
SD SUFFIX
CASE 940B–03
DT SUFFIX
CASE 948F–01
This document contains information on a product under development. Motorola reserves the right to
change or discontinue this product without notice.
11/96
Motorola, Inc. 1996
1
REV 0.2
MC74LCX257
LOGIC DIAGRAM
I0a
I1a
I0b
I1b
I0c
I1c
I0d
I1d
OE
2
3
5
6
14
13
11
10
15
1
S
4
Za
7
Zb
12
Zc
9
Zd
TRUTH TABLE
Inputs Outputs
OE S I0n I1n Zn
H
L
L
L
L
H = High Voltage Level; L = Low V oltage Level; X = High or Low Voltage Level; Z = High Impedance State;
For ICC Reasons DO NOT FLOAT Inputs
X
H
H
L
L
X
X
X
L
H
X
L
H
X
X
Z
L
H
L
H
MOTOROLA LCX DATA
2
BR1339 — REV 3
MC74LCX257
ABSOLUTE MAXIMUM RATINGS*
Symbol Parameter Value Condition Unit
V
CC
V
I
V
O
I
IK
I
OK
I
O
I
CC
I
GND
T
STG
* Absolute maximum continuous ratings are those values beyond which damage to the device may occur. Exposure to these conditions or conditions
beyond those indicated may adversely affect device reliability. Functional operation under absolute–maximum–rated conditions is not implied.
1. Output in HIGH or LOW State. IO absolute maximum rating must be observed.
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Min Typ Max Unit
V
CC
V
I
V
O
I
OH
I
OL
I
OH
I
OL
T
A
∆t/∆V Input Transition Rise or Fall Rate, VIN from 0.8V to 2.0V ,
DC Supply Voltage –0.5 to +7.0 V
DC Input Voltage –0.5 ≤ VI ≤ +7.0 V
DC Output Voltage –0.5 ≤ VO ≤ +7.0 Output in 3–State V
–0.5 ≤ VO ≤ VCC + 0.5 Note 1. V
DC Input Diode Current –50 VI < GND mA
DC Output Diode Current –50 VO < GND mA
+50 VO > V
DC Output Source/Sink Current ±50 mA
DC Supply Current Per Supply Pin ±100 mA
DC Ground Current Per Ground Pin ±100 mA
Storage Temperature Range –65 to +150 °C
Supply Voltage Operating
Data Retention Only
Input Voltage 0 5.5 V
Output Voltage (HIGH or LOW State)
(3–State)
HIGH Level Output Current, VCC = 3.0V – 3.6V –24 mA
LOW Level Output Current, VCC = 3.0V – 3.6V 24 mA
HIGH Level Output Current, VCC = 2.7V – 3.0V –12 mA
LOW Level Output Current, VCC = 2.7V – 3.0V 12 mA
Operating Free–Air Temperature –40 +85 °C
VCC = 3.0V
2.0
1.5
0
0
0 10 ns/V
3.3
3.3
CC
V
3.6
3.6
CC
5.5
mA
V
V
DC ELECTRICAL CHARACTERISTICS
TA = –40°C to +85°C
Symbol Characteristic Condition Min Max Unit
V
IH
V
IL
V
OH
V
OL
2. These values of VI are used to test DC electrical characteristics only.
LCX DATA
BR1339 — REV 3
HIGH Level Input Voltage (Note 2.) 2.7V ≤ VCC ≤ 3.6V 2.0 V
LOW Level Input Voltage (Note 2.) 2.7V ≤ VCC ≤ 3.6V 0.8 V
HIGH Level Output Voltage 2.7V ≤ VCC ≤ 3.6V; IOH = –100µA VCC– 0.2 V
VCC = 2.7V; IOH = –12mA 2.2
VCC = 3.0V; IOH = –18mA 2.4
VCC = 3.0V; IOH = –24mA 2.2
LOW Level Output Voltage 2.7V ≤ VCC ≤ 3.6V; IOL = 100µA 0.2 V
VCC = 2.7V; IOL= 12mA 0.4
VCC = 3.0V; IOL = 16mA 0.4
VCC = 3.0V; IOL = 24mA 0.55
3 MOTOROLA
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