ST M74HC191 User Manual

M74HC191

4 BIT SYNCHRONOUS UP/DOWN COUNTERS

■ HIGH SPEED :

f

= 61 MHz (TYP.) at VCC = 6V

MAX

■ LOW POWER DISSIPATION:

I

=4µA(MAX.) at TA=25°C

CC

■ HIGH NOISE IMMUNITY:

V

= V

NIH

■ SYMMETRICAL OUTPUT IMPEDANCE:

|I

| = IOL = 4mA (MIN)

OH

■ BALANCED PROPAGATION DELAYS:

t

≅ t

PLH

■ WIDE OPERATING VOLTAGE RANGE:

V

(OPR) = 2V to 6V

CC

■ PIN AND FUNCTION COMPATIBLE WITH

= 28 % VCC (MIN.)

NIL

PHL

74 SERIES 191

DESCRIPTION

The M74HC191 is an high speed CMOS 4-BIT
SYNCHRONOUS UP/DOWN COUNTER
fabricated with silicon gate C

2

MOS technology.
State changes of the counter are synchronous
with the LOW-to-HIGH transition of the Clock
Pulse Input.
An asynchronous parallel load input overrides
counting and loads the dat a pres ent on th e DA TA
inputs into the flip-flops, which makes it possible to
use the circuits as programmable counters. A
count enable input serves as the carry/borrow

TSSOPDIP SOP

ORDER CODES

PACKAGE TUBE T & R

DIP M74HC191B1R

SOP M74HC191M1R M74HC191RM13TR

TSSOP M74HC191TTR

input in multi-stage counters. Control input, Down/
Up

, determines whether a circuit counts up or
down. A MAX/MIN output and a Ripple Clock
output provide overflow/underflow indication and
make possible a variety of methods for generating
carry/borrow signals in multi-stage counter
applications.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.

PIN CONNECTION AND IEC LOGIC SYMBOLS

1/14August 2001

M74HC191

INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION

PIN No SYMBOL NAME AND FUNCTION

3, 2, 6, 7 QA to QD Flip-Flop Outputs

4 ENABLE

5U
11 LOAD Load Input (Active LOW)
12 MA/MI OUT Terminal Count Output

13 RC

14 CLOCK

15, 1, 10, 9 DA to DD Data Inputs

8 GND Ground (0V)
16 Vcc Positive Supply Voltage

TRUTH TABLE

/D Parallel Data Input

Count Enable Input
(Active LOW)

Ripple Clock Output
(Active LOW)

Clock Input (LOW to
HIGH, edge triggered)

INPUTS OUTPUTS

LOAD

L X X X a b c d PRESET DATA

H L L UP COUNT UP COUNT
H L H DOWN COUNT DOWN COUNT
H H X NO CHANGE NO COUNT
H X X NO CHANGE NO COUNT

X : Don’t Care
a - d : The leve l of s teady state inputs a through d respec tively

ENABLE D/U CLOCKQAQBQCQD

FUNCTION

2/14

LOGIC DIAGRAM

M74HC191

This log i c diagram has not be used to esti m ate propagation delays

3/14

M74HC191

TIMING CHART

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

V

V

I

I

OK

I

I

or I

CC

P

T

T

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied

(*) 500mW at 65

Supply Voltage

CC

DC Input Voltage -0.5 to VCC + 0.5

I

DC Output Voltage -0.5 to VCC + 0.5

O

DC Input Diode Current

IK

DC Output Diode Current
DC Output Current

O

DC VCC or Ground Current

GND

Power Dissipation

D

Storage Temperature

stg

Lead Temperature (10 sec)

L

°C; derate to 300mW by 10mW/°C from 65°C to 85°C

-0.5 to +7 V
V
V

± 20 mA
± 20 mA
± 25 mA
± 50 mA

500(*) mW

-65 to +150 °C

300 °C

4/14

M74HC191

RECOMMENDED OPERATING CONDITIONS

Symbol Parameter Value Unit

V

V

V

T

t

r

DC SPECIFICATIONS

Symbol Parameter

V

IH

V

IL

V

OH

V

OL

I

I

I

CC

Supply Voltage

CC

Input Voltage 0 to V

I

Output Voltage 0 to V

O

Operating Temperature

op

Input Rise and Fall Time VCC = 2.0V

, t

f

V
V

CC
CC

= 4.5V
= 6.0V

Test Condition Value

= 25°C

T

A

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

High Level Input

V

CC

(V)

2.0 1.5 1.5 1.5

Voltage

6.0 4.2 4.2 4.2

Low Level Input

2.0 0.5 0.5 0.5

Voltage

6.0 1.8 1.8 1.8

High Level Output
Voltage

Low Level Output
Voltage

Input Leakage
Current

Quiescent Supply
Current

2.0

4.5

6.0

4.5

6.0

2.0

4.5

6.0

4.5

6.0

6.0

6.0

IO=-20 µA
I

=-20 µA

O

I

=-20 µA

O

I

=-4.0 mA

O

I

=-5.2 mA

O

IO=20 µA
I

=20 µA

O

I

=20 µA

O

I

=4.0 mA

O

I

=5.2 mA

O

= VCC or GND

V

I

= VCC or GND

V

I

1.9 2.0 1.9 1.9

4.4 4.5 4.4 4.4

5.9 6.0 5.9 5.9

4.18 4.31 4.13 4.10

5.68 5.8 5.63 5.60

0.0 0.1 0.1 0.1

0.0 0.1 0.1 0.1

0.0 0.1 0.1 0.1

0.17 0.26 0.33 0.40

0.18 0.26 0.33 0.40
± 0.1 ± 1 ± 1 µA

44080µA

2 to 6 V

CC
CC

-55 to 125 °C

0 to 1000 ns

0 to 500 ns
0 to 400 ns

-40 to 85°C -55 to 125°C

V
V

Unit

V4.5 3.15 3.15 3.15

V4.5 1.35 1.35 1.35

V

V

5/14

M74HC191

AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns)

Test Condition Value

T

Symbol Parameter

t

TLH tTHL

t

PLH tPHL

Output Transition
Time

Propagation Delay
Time

(CLOCK - Q)

t

PLH tPHL

Propagation Delay
Time

(CLOCK - RCO

t

PLH tPHL

Propagation Delay
Time (CLOCK ­MAX/MIN)

t

PLH tPHL

t

PLH tPHL

t

PLH tPHL

t

PLH tPHL

t

PLH tPHL

Propagation Delay
Time (LOAD

Propagation Delay
Time (DATA - Q)

Propagation Delay
Time (ENABLE

)

RCO
Propagation Delay

Time (D/U

- RCO)

Propagation Delay
Time (D/U

- MAX/

MIN)

f

MAX

t

W(H)

t

W(L)

t

W(L)

Maximum Clock
Frequency

Minimum Pulse
Width (CLOCK)

Minimum Pulse
Width (LOAD

Minimum Set-up

t

s

Time(SI, PI - CK)

Minimum Set-up

t

s

Time(S0, S1 - CK)

Minimum Hold

t

h

Time

- Q)

)

V

CC

(V)

2.0 30 75 95 110

6.0 7131619

2.0 92 180 225 270

6.0 20 31 38 46

2.0 39 120 150 180

)

6.0 11 20 26 31

2.0 120 240 300 360

6.0 26 41 51 61

2.0 108 205 255 310

6.0 23 35 43 53

2.0 84 175 220 265

6.0 18 30 37 45

2.0 39 105 130 160

-

6.0 11 18 22 27

2.0 63 180 225 270

6.0 18 31 38 4 6

2.0 64 160 200 240

6.0 15 27 34 41

2.0 6.2 9 4 3.4

6.0 37 44 24 20

2.0 40 100 125 150

6.0 9172126

2.0 36 75 95 110

6.0 8131619

2.0 80 175 220 265

6.0 17 30 37 45

2.0 16 50 60 75

6.0 3 9 11 13

2.0 0 0 0

6.0 0 0 0

= 25°C

A

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

-40 to 85°C -55 to 125°C

Unit

ns4.5 8151922

ns4.5 23 36 45 54

ns4.5 13 24 30 36

ns4.5 30 48 60 72

ns4.5 27 41 51 61

ns4.5 21 35 44 53

ns4.5 13 21 26 32

ns4.5 21 36 45 5 4

ns4.5 18 32 40 48

MHz4.5 31 37 20 17

ns4.5 10 20 25 30

ns4.5 9151922

ns4.5 20 35 44 53

ns4.5 4101215

ns4.5 0 0 0

6/14

M74HC191

Test Condition Value

= 25°C

Symbol Parameter

t

REM

Minimum Removal
Time (CLEAR

V

CC

(V)

2.0 12 50 60 65

)

T

A

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

6.0 3 9 11 13

CAPACITIVE CHARACTERISTICS

Test Condition Value

T

Symbol Parameter

V

CC

(V)

C

C

1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without

load. (R ef er to Test Circ ui t). Averag e operatin g current can be obtained by t he following equation. I

Input Capacitance

IN

Power Dissipation

PD

Capacitance (note 1)5.0 112 pF

5.0 5101010pF

= 25°C

A

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

TEST CIRCUIT

-40 to 85°C -55 to 125°C

-40 to 85°C -55 to 125°C

= CPD x VCC x fIN + I

CC(opr)

CC

Unit

ns4.5 3101215

Unit

CL = 50pF or equivalent (in cludes jig and probe capaci tance)

= Z

R

of pulse generator (typically 50Ω)

T

OUT

7/14

M74HC191

WAVEFORM 1: PROPAGATION DELAY TIME, MINIMUM PULSE WIDTH (CLOCK)(f=1MHz; 50% duty

cycle)

WAVEFORM 2 : PROPAGATION DELAY TIME, SETUP AND HOLD TIME (A-D TO LOAD

50% duty cycle)

) (f=1MHz;

8/14

M74HC191

WAVEFORM 3 : MINIMUM PULSE WIDTH (LOAD) AND REMOVAL TIME (LOAD TO CLOCK)

(f=1MHz; 50% duty cycle)

WAVEFORM 4 : PROPAGATION DELAY TIME (f=1MHz; 50% duty cycle)

9/14

M74HC191

WAVEFORM 5 : PROPAGATION DELAY TIME (f=1MHz; 50% duty cycle)

WAVEFORM 6 : SETUP AND HOLD TIME (f=1MHz; 50% duty cycle )

10/14

M74HC191

Plastic DIP-16 (0.25) MECHANICAL DATA

mm. inch

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

P001C

11/14

M74HC191

SO-16 MECHANICAL DATA

DIM.

A 1.75 0.068
a1 0.1 0.2 0.003 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.)

MIN. TYP MAX. MIN. TYP. MAX.

mm. inch

12/14

PO13H

M74HC191

TSSOP16 MECHANICAL DATA

mm. inch

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 1.2 0.047

A1 0.05 0.15 0.002 0.004 0.006

A2 0.8 1 1.05 0.031 0.039 0.041

b 0.19 0.30 0.007 0.012

c 0.09 0.20 0.004 0.0089

D 4.9 5 5.1 0.193 0.197 0.201

E 6.2 6.4 6.6 0.244 0.252 0.260

E1 4.3 4.4 4.48 0.169 0.173 0.176

e 0.65 BSC 0.0256 BSC

K0° 8°0° 8°

L 0.45 0.60 0.75 0.018 0.024 0.030

A2

A

A1

b

e

c

K

L

E

D

E1

PIN 1 IDENTIFICATION

1

0080338D

13/14

M74HC191

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consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No li cense is granted by i mp lication or otherwise under a ny patent or patent rig h ts of S TMic roelec tronics. Specifications
mentioned in this publication ar e subject to change without notice. This publication supersedes and replaces all information
previously supplied. S TMicroelectronics products are not authorized for use as critica l components in life suppo rt devices or
systems without express written approval of STMicroelectronics.

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