How it Works
National Semiconductor
Loading...
MM74HC257

National Semiconductor MM54HC257, MM74HC257 Service Manual

Download
Page 1
MM54HC257/MM74HC257 Quad 2-Channel TRI-STATE
General Description
Connection and Logic Diagrams
Dual-In-Line Package
November 1995
Multiplexer
É
The 54HC/74HC logic family is speed, function, and pin-out compatible with the standard 54LS/74LS logic family. All inputs are protected from damage due to static discharge by internal diode clamps to V
and ground.
CC
Features
Y
Typical propagation delay: 12 ns
Y
Wide power supply range: 2V –6V
Y
Low quiescent current: 80 mA maximum (74HC Series)
Y
TRI-STATE outputs for connection to system buses.
MM54HC257/MM74HC257 Quad 2-Channel TRI-STATE Multiplexer
Top View
Order Number MM54HC257 or MM74HC257
TL/F/5329– 1
TL/F/5329– 2
Truth Table
Inputs
Output
Control
H
TRI-STATEÉis a registered trademark of National Semiconductor Corp.
C
1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.
TL/F/5329
Select A B Output Y
HXXXZ LLLXL LLHXH LHXLL LHXHH
e
high level, Lelow level, Xeirrelevant, Zehigh impedance, (off)
Page 2
Absolute Maximum Ratings (Notes1&2)
Operating Conditions
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications.
Supply Voltage (V
CC
)
DC Input Voltage (VIN)
DC Output Voltage (V
OUT
)
Clamp Diode Current (IIK,IOK)
DC Output Current, per pin (I
OUT
)
DC VCCor GND Current, per pin (ICC)
Storage Temperature Range (T
STG
b
b
)
b
0.5 toa7.0V
1.5 to V
CC
0.5 to V
CC
g
g
b
g
65§Ctoa150§C
a
1.5V
a
0.5V
20 mA
35 mA
70 mA
Supply Voltage (V
)26V
CC
DC Input or Output Voltage 0 V
(V
IN,VOUT
)
Operating Temp. Range (TA)
MM74HC MM54HC
Input Rise or Fall Times
e
V
2.0V(tr,tf) 1000 ns
CC
e
V
4.5V 500 ns
CC
e
V
6.0V 400 ns
CC
Power Dissipation (PD)
(Note 3) 600 mW S.O. Package only 500 mW
Lead Temp. (T
) (Soldering 10 seconds) 260§C
L
DC Electrical Characteristics (Note 4)
Symbol Parameter Conditions V
CC
A
e
T
25§C
Typ Guaranteed Limits
V
Minimum High Level 2.0V 1.5 1.5 1.5 V
IH
Input Voltage 4.5V 3.15 3.15 3.15 V
6.0V 4.2 4.2 4.2 V
V
Maximum Low Level 2.0V 0.5 0.5 0.5 V
IL
Input Voltage** 4.5V 1.35 1.35 1.35 V
6.0V 1.8 1.8 1.8 V
V
Minimum High Level V
OH
Output Voltage
e
VIHor V
l
IN
I
OUT
IL
s
20 mA 2.0V 2.0 1.9 1.9 1.9 V
l
4.5V 4.5 4.4 4.4 4.4 V
6.0V 6.0 5.9 5.9 5.9 V
e
V
VIHor V
IN
I
l
OUT
I
l
OUT
l
IN
I
OUT
e
V
Maximum Low Level V
OL
Output Voltage
IL
s
6.0 mA 4.5V 4.2 3.98 3.84 3.7 V
l
s
7.8 mA 6.0V 5.7 5.48 5.34 5.2 V
l
VIHor V
IL
s
20 mA 2.0V 0 0.1 0.1 0.1 V
l
4.5V 0 0.1 0.1 0.1 V
6.0V 0 0.1 0.1 0.1 V
e
V
VIHor V
IN
I
l
OUT
I
l
OUT
I
IN
I
OZ
I
CC
Maximum Input V Current
Maximum TRI-STATE V Output Leakage OCeV
Maximum Quiescent V Supply Current I
Note 1: Absolute Maximum Ratings are those values beyond which damage to the device may occur.
Note 2: Unless otherwise specified all voltages are referenced to ground.
Note 3: Power Dissipation temperature derating Ð plastic ‘‘N’’ package:
Note 4: For a power supply of 5V
designing with this supply. Worst case V
, and IOZ) occur for CMOS at the higher voltage and so the 6.0V values should be used.
I
CC
**V
limits are currently tested at 20% of VCC. The above VILspecification (30% of VCC) will be implemented no later than Q1, CY’89.
IL
e
IN
OUT
e
IN
OUT
g
10% the worst case output voltages (VOH, and VOL) occur for HC at 4.5V. Thus the 4.5V values should be used when
and VILoccur at V
IH
IL
s
6.0 mA 4.5V 0.2 0.26 0.33 0.4 V
l
s
7.8 mA 6.0V 0.2 0.26 0.33 0.4 V
l
VCCor GND 6.0V
e
VCCor GND 6.0V
IH
g
0.1
g
0.5
VCCor GND 6.0V 8.0 80 160 mA
e
0 mA
b
12 mW/§C from 65§Cto85§C; ceramic ‘‘J’’ package:b12 mW/§C from 100§Cto125§C.
e
5.5V and 4.5V respectively. (The VIHvalue at 5.5V is 3.85V.) The worst case leakage current (IIN,
CC
74HC 54HC
eb
T
40 to 85§CT
A
g
1.0
g
5.0
Min Max Units
V
§
§
Units
b b
40 55
A
eb
55 to 125§C
g
g
CC
a
85
a
125
1.0 mA
10 mA
C C
2
Page 3
AC Electrical Characteristics V
CC
5V, T
e
A
25§C, t
e
t
r
f
e
Symbol Parameter Conditions Typ
t
PHL,tPLH
t
PHL,tPLH
t
PZH,tPZL
t
PHZ,tPLZ
Maximum Propagation C Delay, Select to any Y Output
Maximum Propagation C Delay, A or B to any Y Output
Maximum Output Enable R Time, any Y Output to a Logic Level C
Maximum Output Disable R Time, any Y Output to a High Impedance State C
e
45 pF 12 18 ns
L
e
50 pF 13 21 ns
L
e
1kX 17 28 ns
L
e
45 pF
L
e
1kX 15 25 ns
L
e
5pF
L
e
6ns
Guaranteed
Limit
Units
AC Electrical Characteristics V
CC
e
Symbol Parameter Conditions V
e
t
PHL,tPLH
t
PHL,tPLH
t
PZH,tPZL
t
PHZ,tPLZ
t
THL,tTLH
C
PD
Maximum Propagation C Delay, Select to any C Y Output
Maximum Propagation C Delay, A or B to any C Y Output
Maximum Output R Enable Time, any Y Output to a Logic Level
Maximum Output Disable R Time, any Y Output to a High C Impedance State 6.0V 13 26 32 38 ns
Maximum Output Rise C and Fall Time 4.5V 12 15 18 ns
Power Dissipation (per mux) Capacitance (Note 5) Enable 30 pF
50 pF 2.0V 50 100 125 150 ns
L
e
150 pF 2.0V 70 150 189 224 ns
L
e
C
50 pF 4.5V 10 20 25 30 ns
L
e
C
150 pF 4.5V 15 30 38 45 ns
L
e
C
50 pF 6.0V 9 17 21 25 ns
L
e
C
150 pF 6.0V 13 26 32 38 ns
L
e
50 pF 2.0V 50 100 125 150 ns
L
e
150 pF 2.0V 70 150 190 221 ns
L
e
C
50 pF 4.5V 10 20 29 30 ns
L
e
C
150 pF 4.5V 15 30 38 45 ns
L
e
C
50 pF 6.0V 10 17 21 25 ns
L
e
C
150 pF 6.0V 17 26 32 38 ns
L
e
1kX
L
e
C
50 pF 2.0V 75 150 189 224 ns
L
e
C
150 pF 2.0V 100 200 252 298 ns
L
e
C
50 pF 4.5V 15 30 38 45 ns
L
e
C
150 pF 4.5V 20 40 50 60 ns
L
e
C
50 pF 6.0V 13 26 32 38 ns
L
e
C
150 pF 6.0V 17 34 43 51 ns
L
e
1kX 2.0V 75 150 189 224 ns
L
e
50 pF 4.5V 15 30 38 45 ns
L
e
50 pF 2.0V 60 75 90 ns
L
Disabled 8 pF
C
IN
C
OUT
Note 5: CPDdetermines the no load dynamic power consumption, P
Maximum Input 5 10 10 10 pF Capacitance
Maximum Output Capacitance 10 20 20 20 pF
e
D
2.0V to 6.0V, C
T
CC
e
L
e
25§C
A
50 pF, t
e
e
t
6 ns (unless otherwise specified)
r
f
74HC 54HC
eb
T
40 to 85§CT
A
A
eb
55 to 125§C
Typ Guaranteed Limits
6.0V 10 13 15 ns
2
CPDV
faICCVCC, and the no load dynamic current consumption, I
CC
e
CPDVCCfaICC.
S
Units
3
Page 4
Physical Dimensions inches (millimeters)
Order Number MM54HC257J or MM74HC257J
NS Package J16A
Order Number MM74HC257N
NS Package N16E
MM54HC257/MM74HC257 Quad 2-Channel TRI-STATE Multiplexer
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or 2. A critical component is any component of a life systems which, (a) are intended for surgical implant support device or system whose failure to perform can into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life failure to perform, when properly used in accordance support device or system, or to affect its safety or with instructions for use provided in the labeling, can effectiveness. be reasonably expected to result in a significant injury to the user.
National Semiconductor National Semiconductor National Semiconductor National Semiconductor Corporation Europe Hong Kong Ltd. Japan Ltd.
1111 West Bardin Road Fax: ( Arlington, TX 76017 Email: cnjwge@tevm2.nsc.com Ocean Centre, 5 Canton Rd. Fax: 81-043-299-2408 Tel: 1(800) 272-9959 Deutsch Tel: ( Fax: 1(800) 737-7018 English Tel: (
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
Fran3ais Tel: ( Italiano Tel: (
a
49) 0-180-530 85 86 13th Floor, Straight Block, Tel: 81-043-299-2309
a
49) 0-180-530 85 85 Tsimshatsui, Kowloon
a
49) 0-180-532 78 32 Hong Kong
a
49) 0-180-532 93 58 Tel: (852) 2737-1600
a
49) 0-180-534 16 80 Fax: (852) 2736-9960
Loading...
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use