SN74LS290N

Manufacturer Part NumberSN74LS290N
DescriptionDECADE COUNTER 4-BIT BINARY COUNTER
ManufacturerON Semiconductor
SN74LS290N datasheet
 
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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 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).
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
CONNECTION DIAGRAM DIP (TOP VIEW)
V CC
MR
MR
CP 1
CP 0
Q 0
Q 3
14
13
12
11
10
9
8
LS290
1
2
3
4
5
6
7
MS
NC
MS
Q 2
Q 1
NC
GND
V CC
MR
MR
CP 1
CP 0
Q 0
Q 3
14
13
12
11
10
9
8
LS293
1
2
3
4
5
6
7
NC
NC
NC
Q 2
Q 1
NC
GND
PIN NAMES
CP 0
Clock (Active LOW going edge) Input to 2 Section.
CP1
Clock (Active LOW going edge) Input to 5 Section (LS290).
CP1
Clock (Active LOW going edge) Input to 8 Section (LS293).
MR1, MR2
Master Reset (Clear) Inputs
MS1, MS2
Master Set (Preset-9, LS290) Inputs
Q0
Output from 2 Section (Notes b & c)
Q1, Q2, Q3
Outputs from 5 & 8 Sections (Note b)
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.
14
14
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
DECADE COUNTER;
4-BIT BINARY COUNTER
LOW POWER SCHOTTKY
J SUFFIX
CERAMIC
CASE 632-08
1
N SUFFIX
PLASTIC
CASE 646-06
1
D SUFFIX
SOIC
14
CASE 751A-02
1
ORDERING INFORMATION
SN54LSXXXJ
Ceramic
SN74LSXXXN
Plastic
SN74LSXXXD
SOIC
LOADING (Note a)
HIGH
LOW
0.05 U.L.
1.5 U.L.
0.05 U.L.
2.0 U.L.
0.05 U.L.
1.0 U.L.
0.5 U.L.
0.25 U.L.
0.5 U.L.
0.25 U.L.
10 U.L.
5 (2.5) U.L.
10 U.L.
5 (2.5) U.L.

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 ...