Datasheet M74HC161 Datasheet (ST)

M74HC161

SYNCHRONOUS PRESETTABLE 4-BIT COUNTER

■ HIGH SPEED :

f

= 62 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 161

DESCRIPTION

The M74HC161 is an high speed CMOS
SYNCHRONOUS 4-BIT BINARY
PRESETTABLE COU NTER fa bri cated wit h si licon
gate C

2

MOS technology.
The CLOCK input is active on the rising edge.
Both LOAD

and CLEAR input s are active LOW.
Presetting is synchronous on the rising edge of
the clock, the function is cleared asynchronously.

TSSOPDIP SOP

ORDER CODES

PACKAGE TUBE T & R

DIP M74HC161B1R

SOP M74HC161M1R M74HC161RM13TR

TSSOP M74HC161TTR

Two enable inputs (TE and PE) and CARRY
output are provided to enable easy cascading of
counters, which f acilities easy imp lementation of
N-bit counters without using external gates.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.

PIN CONNECTION AND IEC LOGIC SYMBOLS

1/12July 2001

M74HC161

INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION

PIN No SYMBOL NAME AND FUNCTION

1 CLEAR

2 CLOCK

3, 4, 5, 6 A, B, C, D Data Inputs

7 PE Count Enable Input

10 TE Count Enable Carry Input

9LOAD

14, 13, 12,

11
15 CARRY Terminal Count Output

8 GND Ground (0V)

16 Vcc Positive Supply Voltage

TRUTH TABLE

QA to QD Flip Flop Outputs

Asynchronous Master
Reset

Clock Input (LOW to
HIGH, Edge-trigge red)

Parallel Enable Input

INPUTS OUTPUTS

FUNCTION

CLEAR

LOAD PE TE CLOCK QA QB QC QD

L X X X X L L L L RESET TO "0"

H L X X A B C D PRESET DATA
H H X L NO CHANGE NO COUNT
H H L X NO CHANGE NO COUNT
H H H H COUNT UP COUNT
H X X X NO CHANGE NO COUNT

X : Don’t Care
A, B, C, D : Logic level of data inputs
Carry : CARRY = TE·Q

A·QB·QC·QD

LOGIC DIAGRAM

This log i c diagram has not be used to est i m at e propagation delays

2/12

TIMING CHART

M74HC161

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

3/12

M74HC161

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

4/12

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 - CARRY)

t

PLH tPHL

Propagation Delay
Time

(TE - CARRY)

t

t

f

MAX

t

W(H)

t

W(L)

t

W(L)

Propagation Delay

PLH

Time
(CLEAR
Propagation Delay

PHL

Time
(CLEAR
Maximum Clock

Frequency

Minimum Pulse
Width (CLOCK)

Minimum Pulse
Width (CLEAR

Minimum Set-up

t

s

Time
(LOAD
Minimum Set-up

t

s

Time

- Q)

- CARRY)

, PE, TE)

(A, B, C, D)
Minimum Hold

t

h

Time
(A, B - CLOCK)

t

REM

Minimum Removal
Time

V

CC

(V)

2.0 25 75 95 110

6.0 6131619

2.0 48 125 155 190

6.0 14 21 26 32

2.0 57 150 190 225

6.0 16 26 32 38

2.0 39 100 125 150

6.0 11 17 21 26

2.0 60 150 190 225

6.0 17 26 32 38

2.0 72 200 250 300

6.0 20 34 43 51

2.0 6.2 18 5 4.2

6.0 37 62 30 25

2.0 18 75 95 110

6.0 6131619

2.0 24 75 95 110

)

6.0 6131619

2.0 40 100 125 150

6.0 8172126

2.0 20 75 95 110

6.0 3131619

2.0 0 0 0

6.0 0 0 0

2.0 18 50 65 75

6.0 3 9 11 13

= 25°C

A

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

M74HC161

-40 to 85°C -55 to 125°C

Unit

ns4.5 7151922

ns4.5 16 25 31 38

ns4.5 19 30 38 45

ns4.5 13 20 25 30

ns4.5 20 30 38 45

ns4.5 24 40 50 60

MHz4.5 31 53 25 21

ns4.5 6151922

ns4.5 7151922

ns4.5 10 20 25 30

ns4.5 5151922

ns4.5 0 0 0

ns4.5 4101315

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M74HC161

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 Circui t). Averag e operating current can be obtained by the following equation. I

Input Capacitance

IN

Power Dissipation

PD

Capacitance (note 1)5.0 50 pF

5.0 5101010pF

= 25°C

A

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

TEST CIRCUIT

-40 to 85°C -55 to 125°C

= CPD x VCC x fIN + I

CC(opr)

CC

Unit

CL = 50pF or equivalent (includes jig and p robe capacit ance)
R

= Z

of pulse generator (typically 50Ω)

T

OUT

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

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M74HC161

WAVEFORM 2 : PROPAGATION DELAY TIMES,CLEAR MINIMUM PULSE WIDTH (CLEAR MODE)
(f=1MHz; 50% duty cycle)

WAVEFORM 3 : SETUP AND HOLD TIMES (PRESET MODE) (f=1MHz; 50% duty cycle)

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M74HC161

WAVEFORM 4 : SETUP AND HOLD TIMES (COUNTENABLE MODE) (f=1MHz; 50% duty cycle)

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

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M74HC161

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

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M74HC161

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

10/12

PO13H

M74HC161

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

11/12

M74HC161

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