SN74HC193-Q1 Automotive Catalog 4-Bit Synchronous Up/Down Counters (Dual Clock With Clear) | TI.com

SN74HC193-Q1
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Automotive Catalog 4-Bit Synchronous Up/Down Counters (Dual Clock With Clear)

Automotive Catalog 4-Bit Synchronous Up/Down Counters (Dual Clock With Clear) - SN74HC193-Q1
Datasheet
 

Description

The SN74HC193 device is a 4-bit synchronous, reversible, up/down binary counter. Synchronous operation is provided by having all flip-flops clocked simultaneously so that the outputs change simultaneously with each other when dictated by the steering logic. This mode of operation eliminates the output counting spikes normally associated with asynchronous (ripple-clock) counters.

The outputs of the four flip-flops are triggered on a low-to-high-level transition of either count (clock) input (UP or DOWN). The direction of counting is determined by which count input is pulsed while the other count input is high.

All four counters are fully programmable; that is, each output may be preset to either level by placing a low on the load (LOAD) input and entering the desired data at the data inputs. The output changes to agree with the data inputs independently of the count pulses. This feature allows the counters to be used as modulo-N dividers simply by modifying the count length with the preset inputs.

A clear (CLR) input has been provided that forces all outputs to the low level when a high level is applied. The clear function is independent of the count and LOAD inputs.

This counter was designed to be cascaded without the need for external circuitry. The borrow (BO) output produces a low-level pulse while the count is zero (all outputs low) and DOWN is low. Similarly, the carry (CO) output produces a low-level pulse while the count is maximum (9 or 15), and UP is low. The counter then can be cascaded easily by feeding BO and CO to DOWN and UP, respectively, of the succeeding counter.

Features

  • Qualified for Automotive Applications
  • Wide Operating Voltage Range of 2 V to 6 V
  • Outputs Can Drive Up To 10 LSTTL Loads
  • Low Power Consumption, 80-µA Max ICC
  • Typical tpd = 20 ns
  • ±4-mA Output Drive at 5 V
  • Low Input Current of 1 µA Max
  • Look-Ahead Circuitry Enhances Cascaded Counters
  • Fully Synchronous in Count Modes
  • Parallel Asynchronous Load for Modulo-N Count Lengths
  • Asynchronous Clear

Parametrics

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Part number Order Technology Family VCC (Min) (V) VCC (Max) (V) Bits (#) Voltage (Nom) (V) F @ nom voltage (Max) (MHz) ICC @ nom voltage (Max) (mA) tpd @ nom Voltage (Max) (ns) IOL (Max) (mA) IOH (Max) (mA) Function Type Rating Operating temperature range (C) Package Group
SN74HC193-Q1 Order now HC     2     6     4     3.3
5    
28     0.08     55     5.2     -5.2     Counter     Binary     Automotive     -40 to 125     TSSOP | 16    
SN54HC193 Samples not available HC     2     6     4     3.3
5    
28     0.08     55     5.2     -5.2     Counter     Binary     Military     -55 to 125     CDIP | 16    
SN74HC193 Samples not available HC     2     6     4     3.3
5    
28     0.08     55     5.2     -5.2     Counter     Binary     Catalog     -40 to 85     PDIP | 16
SOIC | 16
SO | 16
TSSOP | 16