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SNJ54LS161AW from TI,Texas Instruments

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SNJ54LS161AW

Manufacturer: TI

Synchronous 4-Bit Counters

Partnumber Manufacturer Quantity Availability
SNJ54LS161AW TI 138 In Stock

Description and Introduction

Synchronous 4-Bit Counters The SNJ54LS161AW is a synchronous 4-bit binary counter manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Logic Type:** Synchronous 4-Bit Binary Counter  
- **Supply Voltage Range:** 4.5V to 5.5V  
- **Operating Temperature Range:** -55°C to +125°C (Military Grade)  
- **Count Rate:** Typically 32 MHz  
- **Number of Bits:** 4  
- **Reset Type:** Asynchronous Master Reset  
- **Package Type:** Ceramic Flatpack (W Package)  
- **Propagation Delay:** 20 ns (max)  
- **Power Consumption:** Low-power Schottky (LS) technology  

### **Descriptions and Features:**  
- Synchronous operation for high-speed counting.  
- Fully programmable via parallel load inputs.  
- Asynchronous master reset for immediate clearing.  
- Internal carry look-ahead for fast counting.  
- Cascadable for larger counter applications.  
- TTL-compatible inputs and outputs.  
- Designed for military and aerospace applications.  

This device is part of TI’s 54LS series, which is qualified for high-reliability applications.

Application Scenarios & Design Considerations

Synchronous 4-Bit Counters

Alternative Part Number

  • CD74HCT161E --: HCT-family 4-bit synchronous binary counter with asynchronous clear, functionally equivalent to the LS161 and directly usable in most TTL-level designs.
  • MC74HC161AN --: HC-family 4-bit synchronous binary counter with asynchronous reset, pin-compatible with the LS161 and widely available as a second source.
  • SN74LS161AN --: Standard commercial-temperature LS161 counter in a plastic DIP package, same function and pinout as the military-grade SNJ54LS161AW for non-rugged applications.

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