Product Overview
Windowed CMOS erasable programmable logic device for high-speed state machines
Condition
Unused, NOS – New Old Stock. Excellent, clean and pristine condition. Visual inspection OK. Acquired during a warehouse cleanout of a parts supplier.
Ships same business day. Reliable parts since 1999. Honest pricing, no nonsense.
Product Overview
Cypress Semiconductor CY7C330-50WC is a CMOS UV-erasable EPLD designed for synchronous and asynchronous state machine applications. Housed in a 28-pin windowed ceramic DIP (CerDIP), it allows logic reprogramming via ultraviolet erasure during development and maintenance. The device features 12 configurable macrocells and a 256 product-term architecture, providing dense programmable logic in a single package. The -50 speed grade supports operation up to 50 MHz, making it suitable for high-speed legacy digital systems.
Key Features
- Brand: Cypress Semiconductor
- Model: CY7C330-50WC
- Device type: CMOS UV-erasable EPLD
- Package: 28-pin windowed CerDIP (quartz window)
- Speed grade: 50 MHz maximum operating frequency
- Propagation delay: 15ns to 20ns
- 12 configurable macrocells (registered or combinatorial)
- 256 product terms for complex logic equations
- Clock-to-output (tCO): 10ns
- Active current: 120mA typical
- Programming voltage (VPP): 13V to 13.5V
- Commercial temperature range: 0°C to +70°C
Applications
- Industrial automation control boards
- Telecommunications switching and timing hardware
- Custom state machine implementation
- Replacement for multiple discrete PAL or GAL devices
- Legacy system repair and maintenance
- Development platforms requiring UV-reprogrammable logic
Frequently Asked Questions
Is this an EPROM or a logic device?
It is a UV-erasable CMOS Erasable Programmable Logic Device (EPLD), not a standard EPROM memory chip.
What does the window on top do?
The quartz window allows ultraviolet light to erase the internal EPROM cells so the device can be reprogrammed.
What is the maximum speed?
The -50 speed grade supports operation up to 50 MHz under specified conditions.
What programming voltage is required?
The device requires a dedicated programming voltage of 13V to 13.5V for the EPROM programming cycle.
Is it pin-compatible with standard 28-pin EPROMs?
No. Although it uses a 28-pin package, the pinout and internal function differ from standard EPROM memory devices.
A ceramic-window logic device from the era when programmable hardware meant real UV lamps and careful timing. For legacy maintenance and serious digital restoration, this is the part that keeps older systems alive.
