MC74LCX257 [MOTOROLA]
Low-Voltage CMOS Quad 2-Input Multiplexer; 低电压CMOS四2输入多路复用器
| 型号： | MC74LCX257 |
| 厂家： | 
MOTOROLA |
| 描述： | Low-Voltage CMOS Quad 2-Input Multiplexer |
| 文件： | 总8页 (文件大小：159K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SEMICONDUCTOR TECHNICAL DATA
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
LOW–VOLTAGE CMOS
QUAD 2–INPUT MULTIPLEXER
performance. A V specification of 5.5V allows MC74LCX257 inputs to be
I
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) input. Current
drive capability is 24mA at the outputs.
D SUFFIX
PLASTIC SOIC
CASE 751B–05
16
1
• Designed for 2.7 to 3.6V V
CC
Operation
• 5V Tolerant — Interface Capability With 5V TTL Logic
• Supports Live Insertion and Withdrawal
M SUFFIX
PLASTIC SOIC EIAJ
16
CASE 966–01
• I
OFF
Specification Guarantees High Impedance When V
= 0V
CC
1
• LVTTL Compatible
• LVCMOS Compatible
SD SUFFIX
PLASTIC SSOP
CASE 940B–03
• 24mA Balanced Output Sink and Source Capability
16
• Near Zero Static Supply Current in All Three Logic States (10µA)
Substantially Reduces System Power Requirements
1
• Latchup Performance Exceeds 500mA
• ESD Performance: Human Body Model >2000V; Machine Model >200V
DT SUFFIX
PLASTIC TSSOP
16
CASE 948F–01
1
Pinout: 16–Lead Plastic Package
(Top View)
V
OE
15
I0c
14
I1c
13
Zc
12
I0d
11
I1d
10
Zd
9
CC
PIN NAMES
16
Pins
Function
I0n
I1n
OE
S
Source 0 Data Inputs
Source 1 Data Inputs
Output Enable Input
Select Input
Zn
Outputs
1
2
3
4
5
6
7
8
S
I0a
I1a
Za
I0b
I1b
Zb
GND
This document contains information on a product under development. Motorola reserves the right to
change or discontinue this product without notice.
11/96
REV 0.2
Motorola, Inc. 1996
MC74LCX257
LOGIC DIAGRAM
2
3
4
7
I0a
I1a
Za
Zb
Zc
Zd
5
6
I0b
I1b
14
13
12
9
I0c
I1c
11
10
I0d
I1d
15
1
OE
S
TRUTH TABLE
Inputs
Outputs
OE
S
I0n
I1n
Zn
H
L
L
L
L
X
H
H
L
X
X
X
L
X
L
H
X
X
Z
L
H
L
L
H
H
H = High Voltage Level; L = Low Voltage Level; X = High or Low VoltageLevel; Z = High Impedance State;
For I Reasons DO NOT FLOAT Inputs
CC
MOTOROLA
2
MC74LCX257
ABSOLUTE MAXIMUM RATINGS*
Symbol
CC
Parameter
Value
Condition
Unit
V
V
V
V
DC Supply Voltage
DC Input Voltage
DC Output Voltage
–0.5 to +7.0
–0.5 ≤ V ≤ +7.0
V
I
I
–0.5 ≤ V ≤ +7.0
Output in 3–State
Note 1.
V
O
O
–0.5 ≤ V ≤ V
+ 0.5
CC
V
O
I
I
DC Input Diode Current
DC Output Diode Current
–50
–50
V < GND
mA
mA
mA
mA
mA
mA
°C
IK
I
V
O
< GND
OK
+50
V > V
O CC
I
I
I
DC Output Source/Sink Current
DC Supply Current Per Supply Pin
DC Ground Current Per Ground Pin
Storage Temperature Range
±50
O
±100
±100
CC
GND
T
–65 to +150
STG
*
Absolutemaximumcontinuousratingsarethosevaluesbeyondwhichdamagetothedevicemayoccur. Exposuretotheseconditionsorconditions
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. I absolute maximum rating must be observed.
O
RECOMMENDED OPERATING CONDITIONS
Symbol
CC
Parameter
Min
Typ
Max
Unit
V
Supply Voltage
Operating
Data Retention Only
2.0
1.5
3.3
3.3
3.6
3.6
V
V
V
Input Voltage
0
5.5
V
V
I
Output Voltage
(HIGH or LOW State)
(3–State)
0
0
V
CC
O
5.5
–24
24
I
I
I
I
HIGH Level Output Current, V
= 3.0V – 3.6V
mA
mA
mA
mA
°C
OH
OL
OH
OL
CC
LOW Level Output Current, V
= 3.0V – 3.6V
= 2.7V – 3.0V
= 2.7V – 3.0V
CC
HIGH Level Output Current, V
–12
12
CC
LOW Level Output Current, V
CC
T
A
Operating Free–Air Temperature
Input Transition Rise or Fall Rate, V from 0.8V to 2.0V,
–40
0
+85
10
∆t/∆V
ns/V
IN
V
= 3.0V
CC
DC ELECTRICAL CHARACTERISTICS
T
A
= –40°C to +85°C
Symbol
Characteristic
HIGH Level Input Voltage (Note 2.)
LOW Level Input Voltage (Note 2.)
HIGH Level Output Voltage
Condition
Min
2.0
Max
Unit
V
V
V
V
2.7V ≤ V
≤ 3.6V
IH
CC
CC
2.7V ≤ V
2.7V ≤ V
≤ 3.6V
= –100µA
0.8
V
IL
≤ 3.6V; I
V
– 0.2
V
OH
CC
OH
CC
V
CC
V
CC
V
CC
= 2.7V; I
= 3.0V; I
= 3.0V; I
= –12mA
= –18mA
= –24mA
2.2
OH
OH
OH
2.4
2.2
V
OL
LOW Level Output Voltage
2.7V ≤ V
≤ 3.6V; I
= 100µA
0.2
0.4
V
CC
OL
OL
V
= 2.7V; I = 12mA
CC
CC
CC
V
V
= 3.0V; I
= 3.0V; I
= 16mA
= 24mA
0.4
OL
OL
0.55
2. These values of V are used to test DC electrical characteristics only.
I
3
MOTOROLA
MC74LCX257
DC ELECTRICAL CHARACTERISTICS (continued)
T
A
= –40°C to +85°C
Symbol
Characteristic
Input Leakage Current
Condition
≤ 3.6V; 0V ≤ V ≤ 5.5V
Min
Max
±5.0
±5.0
Unit
µA
I
I
2.7V ≤ V
I
CC
I
3–State Output Current
2.7 ≤ V
≤ 3.6V; 0V ≤ V ≤ 5.5V;
µA
OZ
CC
V = V or V
IL
O
I
IH
I
I
Power–Off Leakage Current
Quiescent Supply Current
V
= 0V; V or V = 5.5V
10
10
µA
µA
µA
µA
OFF
CC
I
O
2.7 ≤ V
≤ 3.6V; V = GND or V
CC
CC
I
CC
2.7 ≤ V
≤ 3.6V; 3.6 ≤ V or V ≤ 5.5V
±10
500
CC
I
O
∆I
CC
Increase in I
CC
per Input
2.7 ≤ V
≤ 3.6V; V = V
IH
– 0.6V
CC
CC
AC CHARACTERISTICS (t = t = 2.5ns; C = 50pF; R = 500Ω)
R
F
L
L
Limits
= –40°C to +85°C
T
A
V
= 3.0V to 3.6V
Max
V
= 2.7V
CC
CC
Symbol
Parameter
Propagation Delay
Waveform
Min
Max
Unit
t
t
1
1.5
1.5
6.0
6.0
6.5
6.5
ns
PLH
PHL
In to Zn
t
t
Propagation Delay
S to Zn
1,2
3
1.5
1.5
7.0
7.0
8.5
8.5
ns
ns
ns
ns
PLH
PHL
t
t
Output Enable Time to HIGH and LOW Level
1.5
1.5
7.0
7.0
8.5
8.5
PZH
PZL
t
t
Output Disable Time from HIGH and LOW
Level
3
1.5
1.5
5.5
5.5
6.0
6.0
PHZ
PLZ
t
t
Output–to–Output Skew
(Note 3.)
1.0
1.0
OSHL
OSLH
3. Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device.
The specification applies to any outputs switching in the same direction, either HIGH–to–LOW (t
guaranteed by design.
) or LOW–to–HIGH (t
OSHL
); parameter
OSLH
DYNAMIC SWITCHING CHARACTERISTICS
T
A
= +25°C
Symbol
Characteristic
Condition
Min
Typ
0.8
0.8
Max
Unit
V
V
V
Dynamic LOW Peak Voltage (Note 4.)
Dynamic LOW Valley Voltage (Note 4.)
V
V
= 3.3V, C = 50pF, V = 3.3V, V = 0V
L IH IL
OLP
CC
= 3.3V, C = 50pF, V = 3.3V, V = 0V
IH IL
V
OLV
CC
L
4. Number of outputs defined as “n”. Measured with “n–1” outputs switching from HIGH–to–LOW or LOW–to–HIGH. The remaining output is
measured in the LOW state.
CAPACITIVE CHARACTERISTICS
Symbol
Parameter
Input Capacitance
Condition
= 3.3V, V = 0V or V
Typical
Unit
pF
C
C
C
V
V
7
8
IN
CC
I
CC
CC
Output Capacitance
= 3.3V, V = 0V or V
pF
OUT
PD
CC
I
Power Dissipation Capacitance
10MHz, V
= 3.3V, V = 0V or V
CC
25
pF
CC
I
MOTOROLA
4
MC74LCX257
2.7V
0V
2.7V
1.5V
1.5V
1.5V
1.5V
In, S
S
0V
t
t
t
t
PLH
PHL
PLH
PHL
V
V
OH
OL
OH
OL
1.5V
1.5V
1.5V
1.5V
Zn
Zn
V
V
WAVEFORM 1 – NON–INVERTING PROPAGATION DELAYS
= t = 2.5ns, 10% to 90%; f = 1MHz; t = 500ns
WAVEFORM 2 – INVERTING PROPAGATION DELAYS
= t = 2.5ns, 10% to 90%; f = 1MHz; t = 500ns
t
t
R
R
F
W
F
W
2.7V
0V
1.5V
1.5V
OE
Zn
t
t
PHZ
PZH
V
V
CC
OH
– 0.3V
1.5V
≈
0V
t
t
PLZ
PZL
≈
3.0V
1.5V
Zn
V
GND
+ 0.3V
OL
WAVEFORM 3 – OUTPUT ENABLE AND DISABLE TIMES
t
= t = 2.5ns, 10% to 90%; f = 1MHz; t = 500ns
R
F
W
Figure 1. AC Waveforms
V
CC
6V
OPEN
GND
R
1
PULSE
GENERATOR
DUT
R
C
R
L
T
L
TEST
SWITCH
Open
6V
t , t
PLH PHL
t , t
PZL PLZ
Open Collector/Drain t
PLH
and t
PHL
6V
t
, t
GND
PZH PHZ
C
R
R
= 50pF or equivalent (Includes jig and probe capacitance)
L
L
T
= R = 500Ω or equivalent
1
OUT
= Z
of pulse generator (typically 50Ω)
Figure 2. Test Circuit
5
MOTOROLA
MC74LCX257
OUTLINE DIMENSIONS
D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751B–05
–A
–
ISSUE J
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
16
1
9
8
–B
–
P 8 PL
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
M
M
0.25 (0.010)
B
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
G
MILLIMETERS
INCHES
DIM
A
B
C
D
F
G
J
MIN
9.80
3.80
1.35
0.35
0.40
MAX
10.00
4.00
1.75
0.49
MIN
MAX
0.393
0.157
0.068
0.019
0.049
0.386
0.150
0.054
0.014
0.016
0.050 BSC
0.008
0.004
F
K
R X 45°
C
1.25
1.27 BSC
–T
0.19
0.10
0.25
0.25
0.009
0.009
J
SEAT
–
ING
M
K
PLANE
D 16 PL
M
P
R
0
5.80
0.25
°
7
6.20
0.50
°
0
°
7°
0.244
0.019
0.229
0.010
M
S
S
0.25 (0.010)
T
B
A
M SUFFIX
PLASTIC SOIC EIAJ PACKAGE
CASE 966–01
ISSUE O
NOTES:
1
DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2
3
CONTROLLING DIMENSION: MILLIMETER.
DIMENSIONS D AND E DO NOT INCLUDE MOLD
FLASH OR PROTRUSIONS AND ARE MEASURED
AT THE PARTING LINE. MOLD FLASH OR
PROTRUSIONS SHALL NOT EXCEED 0.15 (0.006)
PER SIDE.
L
E
16
9
8
Q
1
E H
4
5
TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
E
M
THE LEAD WIDTH DIMENSION (b) DOES NOT
INCLUDE DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.08 (0.003)
TOTAL IN EXCESS OF THE LEAD WIDTH
DIMENSION AT MAXIMUM MATERIAL CONDITION.
DAMBAR CANNOT BE LOCATED ON THE LOWER
RADIUS OR THE FOOT. MINIMUM SPACE
BETWEEN PROTRUSIONS AND ADJACENT LEAD
TO BE 0.46 ( 0.018).
L
1
DETAIL P
Z
D
VIEW P
e
MILLIMETERS
INCHES
A
DIM
A
MIN
---
MAX
2.05
0.20
0.50
0.27
10.50
5.45
MIN
---
MAX
0.081
0.008
0.020
0.011
0.413
0.215
c
A
0.05
0.35
0.18
9.90
5.10
0.002
0.014
0.007
0.390
0.201
1
b
c
D
E
e
A
1
b
1.27 BSC
0.050 BSC
M
0.10 (0.004)
0.13 (0.005)
H
7.40
0.50
1.10
0
8.20
0.85
1.50
10
0.291
0.020
0.043
0
0.323
0.033
0.059
10
E
L
L
M
E
Q
Z
0.70
---
0.90
0.78
0.028
---
0.035
0.031
1
MOTOROLA
6
MC74LCX257
OUTLINE DIMENSIONS
SD SUFFIX
PLASTIC SSOP PACKAGE
CASE 940B–03
ISSUE B
16X K REF
0.12 (0.005)
NOTES:
M
S
S
T
U
V
6
DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
0.25 (0.010)
7
8
CONTROLLING DIMENSION: MILLIMETER.
DIMENSION A DOES NOT INCLUDE MOLD FLASH,
PROTRUSIONS OR GATE BURRS. MOLD FLASH
OR GATE BURRS SHALL NOT EXCEED 0.15
(0.006) PER SIDE.
N
16
9
8
L/2
M
9
DIMENSION B DOES NOT INCLUDE INTERLEAD
FLASH OR PROTRUSION. INTERLEAD FLASH OR
PROTRUSION SHALL NOT EXCEED 0.15 (0.006)
PER SIDE.
N
B
L
F
10 DIMENSION K DOES NOT INCLUDE DAMBAR
PROTRUSION/INTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN
EXCESS OF K DIMENSION AT MAXIMUM
MATERIAL CONDITION. DAMBAR INTRUSION
SHALL NOT REDUCE DIMENSION K BY MORE
THAN 0.07 (0.002) AT LEAST MATERIAL
CONDITION.
PIN 1
IDENT
1
DETAIL E
–U–
A
–V–
K
11 TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
12 DIMENSION A AND B ARE TO BE DETERMINED
AT DATUM PLANE –W–.
J
J1
M
S
0.20 (0.008)
T
U
K1
MILLIMETERS
INCHES
DIM
A
B
C
D
MIN
6.07
5.20
1.73
0.05
0.63
MAX
6.33
5.38
1.99
0.21
0.95
MIN
MAX
0.249
0.212
0.078
0.008
0.037
SECTION N–N
0.238
0.205
0.068
0.002
0.024
–W–
F
C
0.076 (0.003)
SEATING
PLANE
G
H
J
J1
K
K1
L
0.65 BSC
0.026 BSC
0.73
0.09
0.09
0.25
0.25
7.65
0
0.90
0.20
0.16
0.38
0.33
7.90
8
0.028
0.003
0.003
0.010
0.010
0.301
0
0.035
0.008
0.006
0.015
0.013
0.311
8
–T–
D
G
DETAIL E
H
M
7
MOTOROLA
MC74LCX257
OUTLINE DIMENSIONS
DT SUFFIX
PLASTIC TSSOP PACKAGE
CASE 948F–01
ISSUE O
16X KREF
0.10 (0.004)
M
S
S
T
U
V
S
0.15 (0.006) T
U
K
K1
NOTES:
1
DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
16
9
2X L/2
J1
2
3
CONTROLLING DIMENSION: MILLIMETER.
DIMENSION A DOES NOT INCLUDE MOLD FLASH.
PROTRUSIONS OR GATE BURRS. MOLD FLASH
OR GATE BURRS SHALL NOT EXCEED 0.15
(0.006) PER SIDE.
DIMENSION B DOES NOT INCLUDE INTERLEAD
FLASH OR PROTRUSION. INTERLEAD FLASH OR
PROTRUSION SHALL NOT EXCEED
0.25 (0.010) PER SIDE.
DIMENSION K DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.08 (0.003) TOTAL IN
EXCESS OF THE K DIMENSION AT MAXIMUM
MATERIAL CONDITION.
B
–U–
SECTION N–N
L
J
4
5
PIN 1
IDENT.
8
1
N
0.25 (0.010)
S
0.15 (0.006) T
U
A
M
6
7
TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
DIMENSION A AND B ARE TO BE DETERMINED
AT DATUM PLANE –W–.
–V–
N
F
MILLIMETERS
INCHES
DIM
A
B
C
D
F
G
H
J
J1
K
MIN
4.90
4.30
–––
0.05
0.50
MAX
5.10
4.50
1.20
0.15
0.75
MIN
MAX
0.200
0.177
0.047
0.006
0.030
0.193
0.169
–––
0.002
0.020
DETAIL E
–W–
C
0.65 BSC
0.026 BSC
0.18
0.09
0.09
0.19
0.19
0.28
0.20
0.16
0.30
0.25
0.007
0.004
0.004
0.007
0.007
0.011
0.008
0.006
0.012
0.010
0.10 (0.004)
H
DETAIL E
SEATING
PLANE
–T–
D
G
K1
L
6.40 BSC
0.252 BSC
M
0
8
0
8
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specificallydisclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola
datasheetsand/orspecificationscananddovaryindifferentapplicationsandactualperformancemayvaryovertime. Alloperatingparameters,including“Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
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MC74LCX257/D
◊
相关型号：
MC74LCX257DR2
Low-Voltage CMOS Quad 2-Input Multiplexer With 5.0 V−Tolerant Inputs and Outputs (3−State, Non−Inverting)
ONSEMI
MC74LCX257DR2G
Low-Voltage CMOS Quad 2-Input Multiplexer With 5.0 V−Tolerant Inputs and Outputs (3−State, Non−Inverting)
ONSEMI
MC74LCX257DTR
IC LVC/LCX/Z SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16, TSSOP-16, Multiplexer/Demultiplexer
ONSEMI
MC74LCX257DTR2
Low-Voltage CMOS Quad 2-Input Multiplexer With 5.0 V−Tolerant Inputs and Outputs (3−State, Non−Inverting)
ONSEMI
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