NSC DM54L93J-883 Datasheet

TL/F/6637

DM54L93 Decade, Divide-by-12, and Binary Counters

June 1989

DM54L93
Decade, Divide-by-12, and Binary Counters

General Description

Each of these monolithic counters contains four master­slave flip-flops and additional gating to provide a divide-by­two counter and a three-stage binary counter for which the
count cycle length is divide-by-eight.

To use their maximum count length (decade, divide-by­twelve, or four-bit binary), the B input is connected to the Q

A

output. The input count pulses are applied to input A and the
outputs are as described in the appropriate truth table.

Features

Y

Typical power dissipation 16 mW

Y

Count frequency 15 MHz

Connection Diagram

Dual-In-Line Package

TL/F/6637– 1

Order Number DM54L93J or DM54L93W
See NS Package Number J14A or W14B

Function Tables

COUNT SEQUENCE

(See Note A)

Count

Output

Q

D

Q

C

Q

B

Q

A

0LLLL
1LLLH
2LLHL
3LLHH
4LHLL
5LHLH
6LHHL
7LHHH
8HLLL

9HLLH
10 H L H L
11 H L H H
12 H H L L
13 H H L H
14 H H H L
15 H H H H

RESET/COUNT TRUTH TABLE (Note B)

Reset Inputs Output

R0(1) R0(2) QDQCQBQ

A

HHLLLL
L X COUNT
X L COUNT

Note A: Output QAis connected to input B

Note B: H

e

High Level, LeLow Level, XeDon’t Care.

C

1995 National Semiconductor Corporation RRD-B30M105/Printed in U. S. A.

Absolute Maximum Ratings (Note)

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.

Supply Voltage 8V

Input Voltage 5.5V

Operating Free Air Temperature Range

DM54L

b

55§Ctoa125§C

Storage Temperature Range

b

65§Ctoa150§C

Note:

The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaran­teed. The device should not be operated at these limits. The
parametric values defined in the ‘‘Electrical Characteristics’’
table are not guaranteed at the absolute maximum ratings.
The ‘‘Recommended Operating Conditions’’ table will define
the conditions for actual device operation.

Recommended Operating Conditions

Symbol Parameter

DM54L93

Units

Min Nom Max

V

CC

Supply Voltage 4.5 5 5.5 V

V

IH

High Level Input Voltage 2 V

V

IL

Low Level Input Voltage 0.7 V

I

OH

High Level Output Current

b

0.2 mA

I

OL

Low Level Output Current 2 mA

f

CLK

Clock Frequency (Note 5) 0 6 MHz

t

W

Pulse Width (Note 5) A 90

B90 ns

Reset 200

t

REL

Reset Release time (Note 5) 200 ns

T

A

Free Air Operating Temperature

b

55 125

§

C

Electrical Characteristics over recommended operating free air temperature (unless otherwise noted)

Symbol Parameter Conditions Min

Typ

Max Units

(Note 1)

V

OH

High Level Output V

CC

e

Min, I

OH

e

Max

2.4 3.4 V

Voltage V

IL

e

Max, V

IH

e

Min

V

OL

Low Level Output V

CC

e

Min, I

OL

e

Max

Voltage V

IL

e

Max, V

IH

e

Min 0.15 0.3 V

(Note 4)

I

I

Input Current@Max V

CC

e

Max Reset 0.1

Input Voltage V

I

e

5.5V
A 0.2 mA

B 0.2

I

IH

High Level Input V

CC

e

Max Reset 10

Current V

I

e

2.4V
A20mA

B20

I

IL

Low Level Input V

CC

e

Max Reset

b

0.18

Current V

I

e

0.3V
A

b

0.36 mA

B

b

0.36

I

OS

Short Circuit V

CC

e

Max

b

3

b

15 mA

Output Current (Note 2)

I

CC

Supply Current V

CC

e

Max (Note 3) 5.5 mA

Note 1: All typicals are at V

CC

e

5V, T

A

e

25§C.

Note 2: Not more than one output should be shorted at a time.

Note 3: I

CC

is measured with all outputs open, R0 inputs grounded following momentary connection to 4.5V and all other inputs grounded.

Note 4: Q

A

outputs are tested at I

OL

e

max plus the limit value of IILfor the B input. This permits driving the B input while maintaining full fan-out capability.

Note 5: T

A

e

25§C and V

CC

e

5V.

2