SN74LS290N ON Semiconductor, SN74LS290N Datasheet

SN74LS290N

Manufacturer Part Number

SN74LS290N

Description

DECADE COUNTER 4-BIT BINARY COUNTER

Manufacturer

ON Semiconductor

Datasheet

1.SN74LS290N.pdf (5 pages)

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DECADE COUNTER;

4-BIT BINARY COUNTER

counters partitioned into two sections. Each counter has a divide-by-two sec-

tion and either a divide-by-five (LS290) or divide-by-eight (LS293) section

which are triggered by a HIGH-to-LOW transition on the clock inputs. Each

section can be used separately or tied together (Q to CP)to form BCD,

Bi-quinary, or Modulo-16 counters. Both of the counters have a 2-input gated

Master Reset (Clear), and the LS290 also has a 2-input gated Master Set

(Preset 9).

The SN54 / 74LS290 and SN54 / 74LS293 are high-speed 4-bit ripple type

Corner Power Pin Versions of the LS90 and LS93

Low Power Consumption . . . Typically 45 mW

High Count Rates . . . Typically 42 MHz

Choice of Counting Modes . . . BCD, Bi-Quinary, Binary

Input Clamp Diodes Limit High Speed Termination Effects

V CC

NOTES:

a) 1 TTL Unit Load (U.L.) = 40 A HIGH/1.6 mA LOW.

b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial (74) Temperature Ranges.

c) The Q 0 Outputs are guaranteed to drive the full fan-out plus the CP 1 Input of the device.

PIN NAMES

CP 0

CP1

MR1, MR2

MS1, MS2

Q1, Q2, Q3

CONNECTION DIAGRAM DIP (TOP VIEW)

LS290

LS293

CP 1

Q 2

CP 0

Q 1

Clock (Active LOW going edge) Input to 2 Section.

Clock (Active LOW going edge) Input to 5 Section (LS290).

Clock (Active LOW going edge) Input to 8 Section (LS293).

Master Reset (Clear) Inputs

Master Set (Preset-9, LS290) Inputs

Output from 2 Section (Notes b & c)

Outputs from 5 & 8 Sections (Note b)

Q 0

GND

Q 3

NOTE:

The Flatpak version

has the same pinouts

(Connection Diagram) as

the Dual In-Line Package.

FAST AND LS TTL DATA

5-1

SN54/74LS290

SN54/74LS293

4-BIT BINARY COUNTER

0.05 U.L.

ORDERING INFORMATION

LOW POWER SCHOTTKY

0.5 U.L.

HIGH

10 U.L.

SN54LSXXXJ

SN74LSXXXN

SN74LSXXXD

LOADING (Note a)

DECADE COUNTER;

5 (2.5) U.L.

LOW

0.25 U.L.

1.5 U.L.

2.0 U.L.

1.0 U.L.

Ceramic

Plastic

SOIC

CASE 751A-02

CASE 632-08

CASE 646-06

CERAMIC

N SUFFIX

D SUFFIX

J SUFFIX

PLASTIC

SOIC

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SN74LS290N Summary of contents

Page 1

DECADE COUNTER; 4-BIT BINARY COUNTER The SN54 / 74LS290 and SN54 / 74LS293 are high-speed 4-bit ripple type counters partitioned into two sections. Each counter has a divide-by-two sec- tion and either a divide-by-five (LS290) or divide-by-eight (LS293) section which ...

Page 2

SN54/74LS290 LOGIC SYMBOL LS290 PIN 14 GND = PIN ...

Page 3

SN54/74LS290 FUNCTIONAL DESCRIPTION The LS290 and LS293 are 4-bit ripple type Decade, and 4-Bit Binary counters respectively. Each device consists of four master / slave flip-flops which are internally connected to provide a divide-by-two section and a divide-by-five (LS290) or ...

Page 4

SN54/74LS290 SN54/74LS293 GUARANTEED OPERATING RANGES Symbol Parameter V CC Supply Voltage T A Operating Ambient Temperature Range I OH Output Current — High I OL Output Current — Low DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE Symbol Parameter ...

Page 5

SN54/74LS290 AC CHARACTERISTICS ( 5 pF) S Symbol Parameter f MAX CP 0 Input Clock Frequency f MAX CP 1 Input ...

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