EPM7128STC100-10

EPM7128STC100-10 is an Altera MAX 7000S CPLD. It’s a 128-macrocell device in a 100-pin package, with speed grade -10 (faster parts available in the family).
Key points:
- Architecture: 128 macrocells; each macrocell has a 4-input LUT and a flip-flop, plus programmable interconnect to implement glue logic and small state machines.
- I/O: medium I/O count in the 3.3V/5V family (I/O standards and voltage tolerance depend on the bank); suitable for interface and control logic.
- Use cases: glue logic, bus interfacing, simple state machines, counters/decoders, timing/clock routing in embedded systems.
- Programming: configured from an external programming bitstream via Altera programming tools (older: MAX+PLUS II/Quartus, with ByteBlaster or USB-Blaster or similar programmers); configuration memory may be external or supported by the device family setup.
- Note: It’s an older CPLD family; for new designs you might consider newer CPLDs or FPGAs with newer toolchains.

Direct drop-in equivalents for EPM7128STC100-10 do not exist. Within Altera’s EPLD family, the closest substitutes by capacity are other 128-macrocell devices, for example EPM7128SLC100-10 and EPM7256STC100-10 (and related STC/SLC variants). For cross-vendor equivalents, consider similar 128-macrocell CPLDs in Xilinx CoolRunner II (XC2C128) or Lattice ispMACH families, but expect pinout and feature differences and a redesign.

Here are the key features of the EPM7128STC100-10 (Altera EPLD):
- 128 macrocells for logic
- 100-pin package (TQFP-like)
- 5V operating voltage with TTL/CMOS-compatible I/O
- Speed grade -10 (about 10 ns)
- In-system programmable (AS/Active-Serial) with optional JTAG boundary-scan
- Macrocell structure: each macrocell includes a D-type flip-flop and programmable logic terms
- Flexible routing/interconnect among macrocells
- 3-state outputs available
- Suitable for glue logic, state machines, simple controllers and small custom logic
Note: exact I/O counts and RAM features vary by package and device revision; consult the datasheet for precise I/O banks and counts.

Pin count: 100 pins.
Function: Altera EPM7128STC100-10 is an EPLD (MAX 7000S family) with 128 macrocells, an in-system programmable logic device used to implement combinational and sequential logic in a 100-pin package (-speed grade -10).

Manufacturer: Altera Corporation. Altera was an American semiconductor company that designed and manufactured programmable logic devices (EPLDs/CPLDs and FPGAs). It was acquired by Intel in 2015 and is now part of Intel’s Programmable Solutions Group.

Applications of EPM7128STC100-10 (a CPLD):
- Glue logic for microprocessors/embedded systems
- Address/data decoding and memory/peripheral interfacing
- State machines and timing/sequencing control
- I/O expansion and simple peripheral controllers
- Bus interfacing and protocol bridging (routing/signaling)
- Pattern decoding/selection and basic display control
- Debouncing, edge detection, counters and timers
- Custom logic for instrumentation, consumer electronics, automotive panels
Concise, generic CPLD use-cases suitable for small logic tasks and interface glue.

It uses a 100-pin TQFP (Thin Quad Flat Pack) package.