DM74ALS174SJ

Overview

The DM74ALS174SJ is a hex D-type flip-flop manufactured by onsemi, belonging to the 74ALS logic series. It features six independent positive-edge-triggered D flip-flops with true outputs and an active-low master reset input. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports a maximum clock frequency of 50 MHz. Propagation delay is specified at 17 ns under standard conditions (5 V, 50 pF load). It is housed in a 16-SOP surface-mount package and functions within a commercial temperature range of 0°C to +70°C.

Feature Summary

• Hex configuration providing six independent D-type flip-flops in a single integrated circuit
• Positive-edge triggering mechanism for precise data capture synchronized with clock signals
• Active-low master reset input allowing simultaneous clearing of all flip-flop states
• True output configuration delivering non-inverted logic levels directly from each stage

Applications

• Parallel-to-serial data conversion circuits requiring stable storage registers
• High-speed digital counters utilizing multiple synchronized stages
• Shift register implementations for serial data transmission systems
• Memory buffer interfaces in microprocessor-based control architectures

Procurement Notes

Verify component authenticity through authorized distribution channels due to discontinuation status. Confirm RoHS compliance documentation matches current regulatory requirements for your region. Validate package marking codes against official datasheet specifications to prevent counterfeit substitution. Request full traceability records if used in safety-critical or long-lifecycle industrial applications.

Selection Notes

Select this component when designing systems requiring high-speed synchronous data storage with minimal propagation delay. Ensure power supply stability remains within the 4.5 V to 5.5 V range to maintain timing integrity. Consider thermal management for dense PCB layouts as ALS series devices generate moderate static current. Verify that system clock frequencies do not exceed the 50 MHz limit to avoid setup time violations.

Part Context

This part belongs to the 74ALS family, representing Advanced Low-Power Schottky TTL technology. It succeeds earlier 74S series designs while offering improved speed-power product characteristics. The DM prefix indicates onsemi manufacturing standards, distinguishing it from other vendors' equivalent parts like SN74ALS174. This specific SOP variant targets surface-mount assembly processes common in modern electronics manufacturing.

Replacement Considerations

SN74ALS174NSR is documented as a direct substitute from Texas Instruments.