The Vizatek VZ4 is a portable digital IC tester for TTL 7400/74LS00-series and CMOS CD4000/CD4500-series logic chips. It checks each chip by comparing its outputs against a truth or sequence table and can identify unknown part numbers. Chips from 14 to 24 pins fit its 28-pin ZIF socket, and results show on a 2-line, 16-character LCD.
Key Features
- Tests TTL 74/74LS and CMOS 4000/4500 series logic ICs
- Identifies unknown part numbers
- Truth-table and sequence-table comparison
- 28-pin DIP ZIF socket; tests 14- to 24-pin devices
- 2-line × 16-character LCD
- Runs on a 9 V battery (included)
Specifications
| Brand / model | Vizatek VZ4 |
|---|---|
| Supported families | TTL 7400, 74LS00; CMOS CD4000, CD4500 |
| Test method | Truth table / sequence table comparison |
| Socket | 28-pin DIP ZIF |
| Test pins | 14–24 pins |
| Display | LCD, 2 lines × 16 characters |
| Power | 9 V battery (included) |
| Size | 6.3 x 4.3 x 1.8 in |
| Weight | 1 lb |
| SKU | 01VZ4 |
What's Included
- Vizatek VZ4 IC tester
- 9 V battery
Ideal For
Repair techs, schools and hobbyists sorting or verifying salvaged 74xx and 40xx logic chips.
Frequently Asked Questions
Can it identify a chip with a worn marking?
Yes. The listing says it can identify unknown part numbers among its supported 74 and 40/45 series devices.
Does it test memory or microcontrollers?
It is listed for TTL and CMOS logic series only (74xx, 40xx, 45xx).