GSAS Digital IC Tester

The GSAS Digital IC Tester is a handheld, microcontroller-driven device for out-of-circuit testing of digital integrated circuits. Insert any 14 to 40-pin DIP IC into the ZIF socket, and the tester identifies the device, runs its truth table, and displays pass/fail results on the built-in LCD, no reference IC or external equipment needed.

The device supports 100+ IC families including the full 74 series (TTL and CMOS), common microcontrollers, peripheral ICs (8255, 8253, 8259), and RAM modules. An advanced search function can identify unknown ICs by testing them against the internal library, useful for legacy board repair where component markings are unclear.

How a Digital IC Tester Works

A digital IC tester is a functional tester, not a curve tracer or a parametric analyser. The principle is simple enough to state in one paragraph, and understanding it tells you exactly what a pass result does and does not prove.

1. Identify the device under test. You either key in the part number, or let the tester run its search routine and match the device against its internal library.
2. Apply power on the correct pins. Different DIP packages put VCC and GND in different places, which is why the tester needs to know the part before it energises anything. The GSAS unit also supports a power-pin swap mode for parts whose supply pins differ from the family default.
3. Drive the inputs, sample the outputs. For each row of the device’s truth table, the tester drives the input pins to a known state and reads back the output pins.
4. Compare against the expected truth table. Every row must match. A single mismatched row fails the device.
5. Report. The LCD shows pass or fail together with the identified part number, and continuous-loop mode repeats the sequence so an intermittent fault has a chance to show itself.

Two consequences follow. A pass means the logic function is correct at the tester’s own supply voltage and switching speed, so it does not certify propagation delay, drive strength or behaviour at the frequency of your target board. And testing is out-of-circuit: the IC must be out of the board (or in a socket), because surrounding components would otherwise load the pins and produce false failures.

Digital IC Tester or Analog IC Tester?

This is the question most buyers arrive with, and the honest answer decides whether this instrument is the right one.

	Digital IC tester (this unit)	Analog IC tester
What it evaluates	The logic function of a digital device against its truth table	The signature or parametric behaviour of analog parts such as op-amps, comparators, regulators and timers
Typical devices	74 series TTL and CMOS, RAM, peripheral ICs, common microcontrollers	Op-amps, voltage regulators, transistors, diodes, optocouplers
Result	Pass or fail, plus part identification	Waveform, signature trace or measured parameter
In or out of circuit	Out-of-circuit	Varies by instrument

The GSAS Digital IC Tester tests digital devices only. It does not test op-amps, regulators, discrete transistors or other analog parts, and it does not measure parametric values such as offset voltage or gain. If your bench needs both, the digital tester covers the logic side and a separate analog or in-circuit instrument covers the rest. If your failures are on legacy digital boards, glue logic, memory and peripheral controllers, this is the instrument that resolves them fastest.

Key Features

Feature	Detail
Socket	40-pin ZIF, accepts 14–40 pin DIP
IC Library	100+ families (74xx, MCU, RAM, peripherals)
Testing Method	Truth table comparison, out-of-circuit
IC Identification	Auto-search for unknown components
Display	16x2 LCD with pass/fail results
Keypad	13-key for part number entry and commands
Power	USB, 9V DC adapter, or optional battery
Protection	Reverse polarity protection
Test Modes	Continuous loop, power pin swap, functionality
Self-Diagnostics	Built-in self-test capability

Applications

• Board repair: quickly verify suspect ICs before desoldering
• Incoming inspection: test ICs from new or unknown suppliers
• Education: hands-on IC testing in microprocessor labs
• Legacy maintenance: identify unmarked or remarked ICs on old boards
• Quality control: batch-test ICs before assembly

Buying a Digital IC Tester in India

The GSAS Digital IC Tester is designed and built by GSAS Micro Systems in Bangalore, so the engineering team that answers a support call is the team that built the instrument. That matters most for two things buyers ask about: adding a device to the IC library, and diagnosing a part that fails on the tester but works on the board.

Buying question	Answer
Availability	Direct from GSAS Micro Systems, with support across Bengaluru, Hyderabad, Chennai, Pune, Mumbai and Delhi NCR
How to buy	Single units through the GSAS online store; institutional, lab and volume orders through a quotation
Pricing	Quoted in INR on request. GSAS is GeM registered and supports SAP Ariba, Coupa and TReDS, so the commercial terms depend on the procurement route the buyer is using
Invoicing	INR invoicing with GST documentation
Warranty	Manufacturer warranty, direct from GSAS as the manufacturer
Support	Direct access to the design team in Bangalore for library additions and application questions

Products are available for immediate purchase through the GSAS online store (“Buy on Store”) or through direct engagement for institutional and volume orders (“Request Volume Pricing”).