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74LS293

ON Semiconductor
Part Number 74LS293
Manufacturer ON Semiconductor
Description DECADE COUNTER
Published Apr 23, 2005
Detailed Description DECADE COUNTER; 4-BIT BINARY COUNTER The SN54 / 74LS290 and SN54 / 74LS293 are high-speed 4-bit ripple type counters par...
Datasheet PDF File 74LS293 PDF File

74LS293
74LS293

Overview
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 section 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).
SN54/74LS290 SN54/74LS293 DECADE COUNTER; 4-BIT BINARY COUNTER LOW POWER SCHOTTKY • • • • • 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) VCC 14 MR 13 MR 12 CP1 11 CP0 10 Q0 9 Q3 8 NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package.
J SUFFIX CERAMIC CASE 632-08 14 1 14 1 N SUFFIX PLASTIC CASE 646-06 LS290 14 1 MS VCC 14 2 NC MR 13 3 MS MR 12 4 Q2 CP1 11 5 Q1 CP0 10 6 NC Q0 9 7 GND Q3 8 1 D SUFFIX SOIC CASE 751A-02 ORDERING INFORMATION SN54LSXXXJ SN74LSXXXN SN74LSXXXD Ceramic Plastic SOIC LS293 1 NC 2 NC 3 NC 4 Q2 5 Q1 6 NC 7 GND LOADING (Note a) HIGH LOW 1.
5 U.
L.
2.
0 U.
L.
1.
0 U.
L.
0.
25 U.
L.
0.
25 U.
L.
5 (2.
5) U.
L.
5 (2.
5) U.
L.
PIN NAMES 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) CP0 CP1 CP1 MR1, MR2 MS1, MS2 Q0 Q1, Q2, Q3 0.
05 U.
L.
0.
05 U.
L.
0.
05 U.
L.
0.
5 U.
L.
0.
5 U.
L.
10 U.
L.
10 U.
L.
NOTES: a) 1 TTL Unit Load (U.
L.
) = 40 µA HIGH/1.
6 mA LOW.
b) T...


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