SN74ALS533ANSR

Overview

The SN74ALS533ANSR is an octal D-type transparent latch with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range of 0°C to 70°C. The device features eight latches in a single package, providing full parallel access for loading data. Key electrical parameters include a propagation delay from D to Q ranging from 4 ns to 19 ns, a low-level output current capability of 24 mA, and a high-level output current of -2.6 mA. The component is housed in a 20-pin Small-Outline (NS) package.

Feature Summary

• Features three-state bus-driving inverting outputs designed for driving highly capacitive or relatively low-impedance loads.
• Incorporates PNP inputs that reduce DC loading on data lines compared to standard TTL inputs.
• Includes a buffered output-enable input that places outputs in either a normal logic state or a high-impedance state without affecting internal latch operations.

Applications

• Implementing buffer registers
• I/O port implementations
• Bidirectional bus drivers
• Working registers

Procurement Notes

Verify the specific ordering suffix 'SR' corresponds to the tape and reel packaging format containing 2000 units per large reel. Confirm the device status is listed as Active Production. Ensure the lead finish is NIPDAU and the moisture sensitivity level is Level-1-260C-UNLIM for standard surface-mount assembly processes.

Selection Notes

Select this component when an octal latch with inverted outputs and 3-state control is required. It serves as a functional equivalent to the SN74ALS373A but provides inverted outputs instead of non-inverted ones. Consider the ALS series characteristics regarding power consumption and speed if system constraints require lower power than AS series devices while maintaining higher speed than standard LS series.

Part Context

This part belongs to the SN74ALS533A family of octal D-type transparent latches with 3-state outputs. It is functionally equivalent to the SN74ALS373A except for having inverted outputs. The device is characterized for operation from 0°C to 70°C and is available in various package options including plastic small-outline and standard plastic DIPs.

Replacement Considerations

SN74ALS373A is functionally equivalent but provides non-inverted outputs. SN74AS533A offers faster switching speeds and higher drive currents but consumes more power. Verify pin compatibility and output polarity requirements before substitution.