Tamper Response Circuit

Product Specifications

Technical details and manufacturing context for Tamper Response Circuit

Definition

A tamper response circuit is a specialized electronic component used within tamper detection systems. It functions as the active response mechanism that executes predefined security protocols upon receiving signals from tamper sensors, such as switches, seals, or environmental detectors. When a tamper condition is detected, the circuit processes the input signal through logic gates or a microcontroller, activating response actions like data erasure, system shutdown, alarm activation, or event logging. This circuit is designed to operate within specified electrical and environmental parameters, including a supply voltage of 3.3–5.0 V DC, a supply current of 10–50 mA, and an operating temperature range of -40 to 85 °C. It features a tamper detection sensitivity of ±0.1 V, a response time of 1–10 ms, and a tamper latch time of 100–1000 ms. The output type is push-pull, configurable as active high or low, with output voltage levels of 0.9×VDD (high) and 0.1×VDD (low). The input impedance is 10–100 kΩ to avoid loading the sensor. The circuit is typically constructed on a printed circuit board using semiconductor components and solder, with a weight ranging from 5 to 20 g. It is intended for use in computer, electronic, and optical product manufacturing, serving as a critical part of security systems. The circuit complies with relevant standards such as IEC 62368-1 for supply voltage, IEC 60068-2-1 and IEC 60068-2-2 for temperature testing, and IEC 60529 for ingress protection (IP40–IP65). However, these standards are listed as verification references and do not imply certification. Users must verify model-specific values and standards with the legal manufacturer or supplier before deployment.

Working Principle

The circuit monitors input signals from tamper sensors. When a tamper event occurs, the signal is processed through logic gates or a microcontroller, which compares it against a threshold (sensitivity ±0.1 V). If the threshold is exceeded, the circuit activates a response mechanism according to programmed protocols, such as triggering an alarm, disabling functions, or initiating data protection. The output is a push-pull signal that can be configured as active high or low. The circuit includes a latch that holds the output for a specified duration (100–1000 ms) and a reset time (10–100 ms) to clear the latch after the tamper is removed. The response time from event to output change is 1–10 ms.

Common Materials

Semiconductor components, Printed circuit board, Solder

Technical Parameters

Parameter	Typical range	Notes & selection driver
Supply Voltage	3.3–5.0 V DC	Outside this range, circuit may not trigger reliably.IEC 62368-1
Supply Current	10–50 mA	At 5 V, typical current is 20 mA.
Tamper Detection Sensitivity	±0.1 V	Threshold voltage change for trigger.
Response Time	1–10 ms	Time from tamper event to output change.
Operating Temperature	-40–85 °C	Outside this range, performance may degrade.IEC 60068-2-1, IEC 60068-2-2
Storage Temperature	-55–125 °C	Non-operating condition.IEC 60068-2-1, IEC 60068-2-2
Ingress Protection	IP40–IP65	Higher IP for harsh environments.IEC 60529
Tamper Output Type	Push-pull	Configurable as active high or low.
Output Voltage High	0.9×VDD V	Minimum high-level output voltage.
Output Voltage Low	0.1×VDD V	Maximum low-level output voltage.
Tamper Input Impedance	10–100 kΩ	High impedance to avoid loading sensor.
Tamper Latch Time	100–1000 ms	Duration output remains asserted after trigger.
Tamper Reset Time	10–100 ms	Time to clear latch after tamper removed.
Weight	5–20 g	Depends on PCB size and components.

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

Components / BOM

Input Signal Processor
Processes and conditions signals from tamper sensors

Material: Semiconductor IC
Logic Controller
Determines appropriate response based on tamper type and severity

Material: Microcontroller or FPGA
Output Driver
Activates response mechanisms (alarms, switches, etc.)

Material: Transistor array or relay
Latch
Holds the response output asserted for the set duration until reset.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Tamper Detection Circuitry

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Manufacturers of Tamper Response Circuit

Manufacturer profiles associated with Tamper Response Circuit.

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Frequently Asked Questions

What is the typical supply voltage range for this tamper response circuit?

The supply voltage range is 3.3–5.0 V DC, as per the directory reference. However, you must verify the exact range for your specific model with the manufacturer.

How does the circuit respond to a tamper event?

When a tamper sensor detects an event, the circuit processes the signal and activates a response such as an alarm, data erasure, or system shutdown. The response time is 1–10 ms, and the output remains asserted for 100–1000 ms (latch time).

What is the operating temperature range?

The operating temperature range is -40 to 85 °C, with storage temperature from -55 to 125 °C. These are reference values; confirm with the manufacturer for your application.

Is this circuit compliant with any standards?

The directory lists IEC 62368-1, IEC 60068-2-1, IEC 60068-2-2, and IEC 60529 as verification references. This does not imply certification. Always verify compliance with the manufacturer.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	0 to 100 kPa (non-pressurized applications)
other spec:	Operating Voltage: 3.3V to 5V DC, Response Time: <10ms, IP Rating: IP67
temperature:	-40°C to +85°C

Product Specifications

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