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74LS190

Motorola
Part Number 74LS190
Manufacturer Motorola
Description PRESETTABLE 4-BIT BINARY UP/DOWN COUNTERS
Published Apr 23, 2005
Detailed Description PRESETTABLE BCD/DECADE UP/DOWN COUNTERS PRESETTABLE 4-BIT BINARY UP/DOWN COUNTERS The SN54 / 74LS190 is a synchronous UP...
Datasheet PDF File 74LS190 PDF File

74LS190
74LS190

Overview
PRESETTABLE BCD/DECADE UP/DOWN COUNTERS PRESETTABLE 4-BIT BINARY UP/DOWN COUNTERS The SN54 / 74LS190 is a synchronous UP/ DOWN BCD Decade (8421) Counter and the SN54/ 74LS191 is a synchronous UP / DOWN Modulo-16 Binary Counter.
State changes of the counters are synchronous with the LOW-to-HIGH transition of the Clock Pulse input.
An asynchronous Parallel Load (PL) input overrides counting and loads the data present on the Pn inputs into the flip-flops, which makes it possible to use the circuits as programmable counters.
A Count Enable (CE) input serves as the carry / borrow input in multi-stage counters.
An Up / Down Count Control (U/D) input determines whether a circuit counts up or down.
A Terminal Count (TC) output and a Ripple Clock (RC) output provide overflow/underflow indication and make possible a variety of methods for generating carry / borrow signals in multistage counter applications.
SN54/74LS190 SN54/74LS191 PRESETTABLE BCD/ DECADE UP/ DOWN COUNTERS PRESETTABLE 4-BIT BINARY UP/ DOWN COUNTERS LOW POWER SCHOTTKY J SUFFIX CERAMIC CASE 620-09 16 1 • • • • • • • • Low Power .
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90 mW Typical Dissipation High Speed .
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25 MHz Typical Count Frequency Synchronous Counting Asynchronous Parallel Load Individual Preset Inputs Count Enable and Up/ Down Control Inputs Cascadable Input Clamp Diodes Limit High Speed Termination Effects CONNECTION DIAGRAM DIP (TOP VIEW) V CC 16 P 0 15 CP 14 RC 13 TC 12 PL 11 P 2 10 P 3 9 16 1 N SUFFIX PLASTIC CASE 648-08 16 1 D SUFFIX SOIC CASE 751B-03 ORDERING INFORMATION NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package.
SN54LSXXXJ SN74LSXXXN SN74LSXXXD Ceramic Plastic SOIC 1 P 1 2 Q 1 3 Q 0 4 CE 5 U/D 6 Q 2 7 Q 3 8 GND LOGIC SYMBOL 11 15 1 10 9 PIN NAMES LOADING (Note a) HIGH LOW 0.
7 U.
L.
0.
25 U.
L.
0.
25 U.
L.
0.
25 U.
L.
0.
25 U.
L.
5 (2.
5) U.
L.
5 (2.
5) U.
L.
5 (2.
5) U.
L.
PL 5 U/D P 0 P P 1 2 P 3 RC 13 CE CP U/D PL Pn Qn RC TC Count Enable (Active LOW) Input Cloc...


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