Latch Circuit: Temperature Range -40°C to 125°C

Component Specifications

Definition

A latch circuit is a fundamental digital memory element that stores a single bit of data. In sense amplifier applications, it captures and holds the amplified signal from memory cells (like in DRAM or SRAM) during read operations, preventing data loss during subsequent processing. It consists of cross-coupled logic gates (typically NAND or NOR) that create a bistable state, maintaining output even after input changes until a reset signal is applied.

Working Principle

Operates on bistable multivibrator principle using positive feedback. When enabled, it samples the input signal from the sense amplifier and locks it into one of two stable states (high or low). The output remains latched regardless of input changes until a reset or enable signal toggles it. In sense amplifiers, it typically uses SR (Set-Reset) or D-type latch configurations to capture voltage differences amplified from memory cell readings.

Materials

Semiconductor materials (silicon, gallium arsenide), copper/aluminum interconnects, dielectric layers (SiO2, high-k materials), packaging materials (epoxy, ceramic substrates).

Technical Parameters

Parameter	Typical range	Notes & selection driver
Hold Time	0.3-1.5 ns
Setup Time	0.5-2 ns
Package Type	SOP, QFP, BGA
Operating Voltage	1.2V, 1.8V, 3.3V, 5V
Power Consumption	0.1-5 mW
Propagation Delay	1-5 ns
Temperature Range	-40°C to 125°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

IEC 60747, JEDEC JESD78

Parent Products

This component is used in the following industrial products

Sense Amplifier

A circuit that detects and amplifies small voltage differences from memory cells to determine stored data values.

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Sense Amplifiers

Electronic circuits that detect and amplify small voltage differences from memory cells to determine stored data values (0 or 1).

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Engineering Analysis

Risks & Mitigation

Metastability causing data errors
Timing violations due to signal skew
Electrostatic discharge damage
Thermal degradation at high frequencies

FMEA Triads

Trigger: Insufficient setup/hold time margins
Failure: Incorrect data latching
Mitigation: Implement timing analysis tools, use matched delay lines, and add guard bands in clock distribution

Trigger: Power supply noise or voltage droops
Failure: Unstable latch state or data corruption
Mitigation: Use decoupling capacitors, robust power distribution networks, and voltage regulators

Trigger: Radiation or electromagnetic interference
Failure: Bit flips or soft errors
Mitigation: Implement error-correcting codes, radiation-hardened designs, and shielding

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±5% voltage tolerance, ±0.1 ns timing tolerance, ±10% power consumption tolerance

Test Method

JEDEC JESD78 latch-up test, IEC 60747 semiconductor test, automated test equipment (ATE) for functional and parametric testing

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Latch Circuit

Manufacturer profiles associated with Latch Circuit.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the difference between a latch and a flip-flop in sense amplifiers?

Latches are level-sensitive and transparent when enabled, while flip-flops are edge-triggered. In sense amplifiers, latches are often preferred for faster signal capture during the amplification window, whereas flip-flops provide synchronized timing at clock edges.

How does a latch circuit improve sense amplifier performance?

It prevents data corruption by holding the amplified signal stable during subsequent operations, reduces timing constraints, and enables asynchronous read operations in memory systems.

What are common failure modes of latch circuits in industrial applications?

Metastability issues, setup/hold time violations, leakage current in low-power modes, and electromigration in interconnects under high-frequency operation.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Latch Circuit