M4A3-64/32-7JI

Complex Programmable Logic Devices Overview

The M4A3-64/32-7JI is a 3.3-V ispMACH 4A Complex Programmable Logic Device (CPLD) featuring 64 macrocells and 32 user I/Os. It operates at the -7 speed grade with a guaranteed maximum propagation delay (tPD) of 7.5 ns and a counter frequency (fCNT) of 167 MHz. The device utilizes E2CMOS technology for in-system programming via JTAG. It includes dedicated input registers, synchronous/asynchronous macrocell modes, and supports mixed-voltage system designs with 5-V tolerant inputs.

Complex Programmable Logic Devices Feature Summary

• 64 Macrocells with 32 User I/Os in a 44-pin PLCC or TQFP package
• 7.5 ns maximum tPD and 167 MHz fCNT performance (-7 speed grade)
• SpeedLocking architecture ensuring fixed timing regardless of logic complexity
• JTAG (IEEE 1149.1) compliant for boundary scan testing and in-system programming

Complex Programmable Logic Devices Applications

• PCI-compliant interface logic
• Mixed-voltage system integration
• High-speed data routing and buffering
• Complex state machine implementation

Complex Programmable Logic Devices Procurement Notes

Verify the ordering suffix '7' corresponds to the -7 speed grade (7.5 ns tPD) and 'I' indicates Industrial temperature range. Confirm the package type matches the specific variant (e.g., PLCC vs TQFP) as the base model number covers multiple package options. Ensure lead-free status requirements are met if applicable.

Complex Programmable Logic Devices Selection Notes

Select this part for designs requiring 64 macrocells with strict timing predictability. The -7 grade offers a balance between speed and power. Consider the 2:1 macrocell-to-I/O ratio which allows flexible pinout retention during design refits. Verify that the 3.3-V supply voltage aligns with the target system's logic levels.

Complex Programmable Logic Devices Part Context

This component belongs to the Lattice ispMACH 4A family, which provides high-performance E2CMOS CPLDs. The family ranges from 32 to 512 macrocells. The M4A3-64/32 variant specifically denotes a 3.3-V device with 64 macrocells and 32 I/Os, distinguishing it from the M4A5 series (5-V) and other density variants like M4A3-96.

Complex Programmable Logic Devices Replacement Considerations

Direct substitutes within the same speed grade and density include other M4A3-64/32 variants with different package suffixes (e.g., PQFP, TQFP). For higher density, consider M4A3-96/48. For lower density, M4A3-32/32 may suffice if resources allow. Cross-family replacement requires re-evaluation of timing and pin compatibility.