Datasheet M74HC237 Datasheet (SGS Thomson Microelectronics)

.HIGH SPEED

tPD= 12 ns(TYP.) at VCC=5V

.LOWPOWERDISSIPATION

ICC=4µA(MAX.) AT TA=25°C

.HIGH NOISEIMMUNITY

V

NIH=VNIL

=28%VCC(MIN.)

.OUTPUT DRIVE CAPABILITY

10 LSTTL LOADS

.SYMMETRICALOUTPUT IMPEDANCE

IOH =IOL= 4 mA(MIN.)

.BALANCEDPROPAGATION DELAYS

t

PLH=tPHL

.WIDE OPERATINGVOLTAGE RANGE

VCC(OPR)= 2 V TO6 V

.PIN ANDFUNCTION COMPATIBLE

WITH 54/74LS237

M54HC237
M74HC237

3 TO8 LINE DECODER LATCH

B1R

(PlasticPackage)

M1R

(MicroPackage)

ORDER CODES :

M54HC 237F1R M74H C237M1R
M74HC 237B1R M74HC2 37C1R

F1R

(CeramicPackage)

C1R

(Chip Carrier)

DESCRIPTION

The M54/74HC237 is a high speed CMOS 3 TO 8
LINE DECODER LATCH fabricated in silicon gate
C2MOStechnology.

It has the same high speed performance of LSTTL
combined with true CMOS low power consumption.
WhenGL goes from low to high, the address present
atthe select inputs (A, B, C) isstored in thelatches.
Aslong as GLremains highno address changes will
be recognized. Output enable controls, G1 and G2
control the state of the outputs independantly of the
selector latch-enableinputs. Alloftheoutputs are low
unless G1is high andG2is low. The ’HC237 is ideally
suited for the implementation of glitch-free decoders
in stored-address applications in bus oriented sys­tems. Allinputs areequipped with protection circuits
againststatic discharge andtransient excessvoltage.

NC =
No Internal
Connection

PIN CONNECTIONS(top view)

October 1992

1/11

M54/M74HC237

INPUT AND OUTPUT EQUIVALENT CIRCUIT

IEC LOGIC SYMBOLS

PIN DESCRIPTION

PIN No SYMBOL NAME AND FUNCTION

1, 2, 3 A, B, C Data Inputs

4 GL Latch Enable Input

(Active LOW)

5 G2 Data Enable Input

(Active LOW)

6 G1 Data Enable Input

(Active HIGH)

15, 14, 13,

12, 11, 10, 9,

7
8 GND Ground (0V)

16 V

Y0 to Y7 Decoder Outputs

CC

Positive Supply Voltage

TRUTH TABLE

INPUTS

ENABLE SELECT

GLG2G1CBAY0Y1Y2Y3Y4Y5Y6Y7

XXLXXXLLLLLLLL
XHXXXXLLLLLLLL
LLHLLLHLLLLLLL
LLHLLHLHLLLLLL
LLHLHLLLHLLLLL
LLHLHHLLLHLLLL
LLHHLLLLLLHLLL
LLHHLHLLLLLHLL
LLHHHLLLLLLLHL
LLHHHHLLLLLLLH
H L H X X X OUTPUT CORRESPONDING TO STORED ADDRESS, H: ALL OTHERS, L

X: Don’t Care

2/11

OUTPUS

LOGIC DIAGRAM

M54/M74HC237

ABSOLU TE M AXI MU M R AT INGS

Symbol Parameter Value Unit

V

CC

V

V

O

I

IK

I

OK

I

O

I

or I

CC

P

D

T

stg

T

AbsoluteMaximumRatingsarethose valuesbeyond whichdamage to thedevice mayoccur.Functional operation under these conditionisnotimplied.
(*)500 mW: ≅ 65oC derateto300 mWby 10mW/oC: 65oCto85oC

Supply Voltage -0.5 to +7 V
DC Input Voltage -0.5 to VCC+ 0.5 V

I

DC Output Voltage -0.5 to VCC+ 0.5 V
DC Input Diode Current ± 20 mA
DC Output Diode Current ± 20 mA
DC Output Source Sink Current Per Output Pin ± 25 mA
DC VCCor Ground Current ± 50 mA

GND

Power Dissipation 500 (*) mW
Storage Temperature -65 to +150
Lead Temperature (10 sec) 300

L

o

C

o

C

3/11

M54/M74HC237

RECO MM ENDED O PERAT IN G CONDI TIONS

Symbol Parameter Value Unit

V

V

V

T

t

r,tf

DC SPECIFICATIO NS

Symbol Parameter

V

IH

V

V

OH

V

OL

I

I

CC

Supply Voltage 2 to 6 V

CC

Input Voltage 0 to V

I

Output Voltage 0 to V

O

Operating Temperature: M54HC Series

op

M74HC Series

CC
CC

-55 to +125

-40 to +85

Input Rise and Fall Time VCC= 2 V 0 to 1000 ns

V

= 4.5 V 0 to 500

CC

V

= 6 V 0 to 400

CC

Test Conditions Value

T

High Level Input
Voltage

=25oC

V

(V)

CC

A

54HC and 74HC

Min. Typ. Max. Min. Max. Min. Max.

2.0 1.5 1.5 1.5

4.5 3.15 3.15 3.15

-40 to 85oC
74HC

-55 to 125oC

6.0 4.2 4.2 4.2

Low Level Input

IL

Voltage

2.0 0.5 0.5 0.5

4.5 1.35 1.35 1.35

6.0 1.8 1.8 1.8

High Level
Output Voltage

Low Level Output
Voltage

Input Leakage

I

Current
Quiescent Supply

2.0
V

=

I

4.5 4.4 4.5 4.4 4.4

6.0 5.9 6.0 5.9 5.9

4.5 I

6.0 I

2.0

4.5 0.0 0.1 0.1 0.1

6.0 0.0 0.1 0.1 0.1

4.5 I

6.0 I

6.0

IO=-20 µA

V

IH

or

V

IL

=-4.0 mA 4.18 4.31 4.13 4.10

O

=-5.2 mA 5.68 5.8 5.63 5.60

O

=

V

I

IO=20µA

V

IH

or

V

IL

= 4.0 mA 0.17 0.26 0.33 0.40

O

= 5.2 mA 0.18 0.26 0.33 0.40

O

VI=VCCor GND ±0.1 ±1 ±1 µA

1.9 2.0 1.9 1.9

0.0 0.1 0.1 0.1

6.0 VI=VCCor GND 4 40 80 µA

Current

54HC

V
V

o

C

o

C

Unit

V

V

V

V

4/11

M54/M74HC237

AC ELECTRICAL CHARACTERI STI CS (CL=50pF,Inputtr=tf=6ns)

Test Conditions Value

=25oC

T

Symbol Parameter

t
t

TLH
THL

Output Transition
Time

V

CC

(V)

2.0 30 75 95 115

4.5 8151922

A

54HC and 74HC

Min. Typ. Max. Min. Max. Min. Max.

6.0 7131619

t

PLH

t

PHL

t

PLH

t

PHL

t

PLH

t

PHL

t

PLH

t

PHL

t

W(L)

C

C

PD

Propagation
Delay Time
(A, B, C - Y)

Propagation
Delay Time
(G1 - Y)

Propagation
Delay Time
(G2 - Y)

Propagation
Delay Time
(GL - Y)

Minimum Pulse
Width
(GL)

t

Minimum Set-up

s

Time
(A, B, C - GL)

t

Minimum Hold

h

Time
(A, B, C - GL)

Input Capacitance 5 10 10 10 pF

IN

(*) Power Dissipation

2.0 60 180 225 270

4.5 19 36 45 54

6.0 16 31 38 46

2.0 45 140 175 210

4.5 15 28 35 42

6.0 13 24 30 36

2.0 45 140 175 210

4.5 15 28 35 42

6.0 13 24 30 36

2.0 65 190 240 285

4.5 21 38 48 57

6.0 18 32 41 48

2.0 10 75 95 110

4.5 6151922

6.0 6131619

2.0 12 50 65 75

4.5 3101315

6.0 2 9 11 13

2.0 25 30 40

4.5 5 6 8

6.0 5 5 7

52

Capacitance

(*) CPDisdefined as the value ofthe IC’sinternal equivalent capacitance which is calculated fromthe operatingcurrent consumption without load.

-40 to 85oC
74HC

-55 to 125oC
54HC

Unit

ns

ns

ns

ns

ns

ns

ns

ns

pF

SWITCHING CHARACTERISTICS TEST WAVEFORM

5/11

M54/M74HC237

TEST CIRCUIT ICC(Opr.)

INPUTTRANSITIONTIMEISTHESAMEASTHATINCASE OFSWITCHING CHARACTERISTICSTEST.

6 Line to 64 LineDecoder with Input Address Storage.

6/11

Plastic DIP16 (0.25) MECHANICAL DATA

M54/M74HC237

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

a1 0.51 0.020

B 0.77 1.65 0.030 0.065

b 0.5 0.020

b1 0.25 0.010

D 20 0.787
E 8.5 0.335

e 2.54 0.100

e3 17.78 0.700

F 7.1 0.280

I 5.1 0.201

L 3.3 0.130

Z 1.27 0.050

mm inch

P001C

7/11

M54/M74HC237

Ceramic DIP16/1 MECHANICAL DATA

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 20 0.787
B 7 0.276
D 3.3 0.130
E 0.38 0.015

e3 17.78 0.700

F 2.29 2.79 0.090 0.110
G 0.4 0.55 0.016 0.022
H 1.17 1.52 0.046 0.060

L 0.22 0.31 0.009 0.012
M 0.51 1.27 0.020 0.050
N 10.3 0.406

P 7.8 8.05 0.307 0.317

Q 5.08 0.200

mm inch

8/11

P053D

SO16 (Narrow) MECHANICAL DATA

M54/M74HC237

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 1.75 0.068
a1 0.1 0.2 0.004 0.007
a2 1.65 0.064

b 0.35 0.46 0.013 0.018

b1 0.19 0.25 0.007 0.010

C 0.5 0.019

c1 45° (typ.)

D 9.8 10 0.385 0.393

E 5.8 6.2 0.228 0.244

e 1.27 0.050

e3 8.89 0.350

F 3.8 4.0 0.149 0.157

G 4.6 5.3 0.181 0.208

L 0.5 1.27 0.019 0.050

M 0.62 0.024

S8°(max.)

mm inch

P013H

9/11

M54/M74HC237

PLCC20 MECHANICAL DATA

DIM.

MIN. TYP. MAX. MIN. TYP. MAX.

A 9.78 10.03 0.385 0.395

B 8.89 9.04 0.350 0.356

D 4.2 4.57 0.165 0.180
d1 2.54 0.100
d2 0.56 0.022

E 7.37 8.38 0.290 0.330

e 1.27 0.050

e3 5.08 0.200

F 0.38 0.015
G 0.101 0.004
M 1.27 0.050

M1 1.14 0.045

mm inch

10/11

P027A

M54/M74HC237

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consequences of useof suchinformation nor for any infringement of patents or other rights of third parties which may results from its use. No
license is granted byimplication or otherwiseunder any patentor patentrights ofSGS-THOMSON Microelectronics. Specificationsmentioned
in this publication are subjectto changewithout notice. This publication supersedes andreplaces all information previouslysupplied.
SGS-THOMSON Microelectronicsproducts are not authorized foruse ascritical componentsin life supportdevices or systems without express
written approval of SGS-THOMSON Microelectonics.

 1994SGS-THOMSON Microelectronics- All Rights Reserved

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11/11