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SN7490AN from TI,Texas Instruments

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SN7490AN

Manufacturer: TI, TI., TEXAS

DECADE/ DIVIDE-BY-TWELVE AND BINARY COUNTERS

Partnumber Manufacturer Quantity Availability
SN7490AN TI, TI., TEXAS 493 In Stock

Description and Introduction

DECADE/ DIVIDE-BY-TWELVE AND BINARY COUNTERS The SN7490AN is a decade counter manufactured by Texas Instruments. Here are its specifications, descriptions, and features:

### **Specifications:**  
- **Manufacturer:** Texas Instruments  
- **Type:** Decade Counter (Divide-by-10)  
- **Logic Family:** TTL (Transistor-Transistor Logic)  
- **Package:** PDIP-14 (Plastic Dual In-line Package)  
- **Operating Voltage:** 5V (Standard TTL)  
- **Operating Temperature Range:** 0°C to +70°C  
- **Counting Sequence:** BCD (Binary-Coded Decimal)  
- **Maximum Clock Frequency:** 32 MHz (typical)  
- **Output Type:** Standard TTL  

### **Descriptions:**  
- The SN7490AN is a 4-bit ripple counter with a built-in divide-by-2 and divide-by-5 section.  
- It can be configured as a decade counter (BCD output) or a bi-quinary counter (divide-by-2 and divide-by-5 independently).  
- Includes master-slave flip-flops for reliable counting.  
- Requires external gating for reset and clear functions.  

### **Features:**  
- **Decade Counting:** Provides BCD output (0000 to 1001).  
- **Independent Sections:** Divide-by-2 and divide-by-5 counters can be used separately.  
- **Asynchronous Operation:** No synchronous clocking required.  
- **Reset Capability:** Can be reset to zero via external inputs.  
- **TTL-Compatible Inputs/Outputs:** Works with standard TTL logic levels.  
- **Wide Operating Voltage:** Designed for 5V operation.  

This information is based solely on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

DECADE/ DIVIDE-BY-TWELVE AND BINARY COUNTERS

Alternative Part Number

  • DM7490AN --: Direct pin-compatible 7490 decade counter in DIP-14 from a different vendor, widely available as a drop-in replacement.
  • MC7490AP --: Equivalent 7490 decade counter in DIP-14 with the same logic function and pinout, suitable for direct substitution.
  • 74LS90 --: Low-power Schottky version of the 7490 decade counter with identical function and pinout; faster and lower power, though TTL input levels should be verified.
  • MC7490P --: Classic 7490 decade counter in DIP package with identical logic function and pinout, suitable for legacy designs.
  • 74LS90N --: Low-power Schottky version of the 7490 decade counter, pin-compatible and functionally equivalent, though slightly faster and lower power.

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