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SN74ALS990DWR from TI,Texas Instruments

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SN74ALS990DWR

Manufacturer: TI, N/A

Octal D-Type Transparent Read-Back Latches

Partnumber Manufacturer Quantity Availability
SN74ALS990DWR TI, N/A 1062 In Stock

Description and Introduction

Octal D-Type Transparent Read-Back Latches The SN74ALS990DWR is a part manufactured by Texas Instruments. Below are its specifications, descriptions, and features based on factual information:  

### **Specifications:**  
- **Manufacturer:** Texas Instruments  
- **Category:** Integrated Circuits (ICs)  
- **Family:** Logic - Latches  
- **Type:** D-Type Transparent Latch  
- **Number of Bits:** 8  
- **Output Type:** Tri-State  
- **Voltage - Supply:** 4.5V to 5.5V  
- **Operating Temperature:** 0°C to 70°C  
- **Package / Case:** SOIC-20  
- **Mounting Type:** Surface Mount  
- **Logic Level - Low:** 0.8V  
- **Logic Level - High:** 2V  

### **Descriptions:**  
- The SN74ALS990DWR is an 8-bit transparent latch with 3-state outputs.  
- It is designed for bus-organized systems where multiple devices share a common bus.  
- The latch allows data to be stored when the enable (G) input is high and provides high-impedance outputs when the output enable (OE) is high.  

### **Features:**  
- **8-Bit Transparent Latch:** Latches data when enabled.  
- **3-State Outputs:** Allows multiple devices to share a common bus.  
- **Wide Operating Voltage Range:** 4.5V to 5.5V.  
- **High-Speed Operation:** Suitable for high-performance logic applications.  
- **Low Power Consumption:** ALS technology ensures efficient power usage.  
- **ESD Protection:** Provides improved reliability in harsh environments.  

This information is strictly based on the manufacturer's datasheet and technical specifications.

Application Scenarios & Design Considerations

Octal D-Type Transparent Read-Back Latches

Alternative Part Number

  • 74ALS990DW --: Same 74ALS990 octal transparent latch function in a SOIC-20 wide package, pin-compatible with the DWR variant and available from a different manufacturer.
  • SN74ALS990DW --: Identical ALS990 function in the same SOIC-20 wide body without the tape-and-reel suffix, suitable when reel packaging is not required.
  • MC74ACT990DWR2 --: ACT990 octal transparent latch with similar logic function and SOIC-20 wide package; verify AC timing and drive levels against the ALS original.
  • MC74ACT990DW --: ACT-family 8-bit transparent D-type latch with inverted outputs in SOIC-20, pin-compatible and a common cross-family substitute.
  • 74F990DW --: Fast 8-bit transparent latch with inverting outputs in SOIC-20; similar logic function and package, usable where slightly different speed/power is acceptable.

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