A42MX24-3PLG84 - 36K Gate MX FPGA, 84-PLCC | Microchip
料号： A42MX24-3PLG84 ⚠ 最后一次采购| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $68.5 | $68.50 |
| 10 | $62.1 | $621.00 |
| 100 | $55.4 | $5,540.00 |
| 500 | $49.8 | $24,900.00 |
| 1,000 | $44.2 | $44,200.00 |
A42MX24-3PLG84 概述
An FPGA (Field-Programmable Gate Array) is a semiconductor device containing configurable logic blocks and programmable interconnects that designers configure after manufacturing. The MX family occupies the antifuse-based FPGA category within the broader programmable logic hierarchy (FPGA -> programmable logic -> semiconductors), positioning it as a single-chip ASIC alternative for legacy system integration.
Key features include the flexible 5.0V-tolerant architecture inherited from the Actel MX lineage, antifuse programmability that yields non-volatile, single-chip operation with no configuration PROM, and D-modules with wide-decode circuitry providing fast, wide-input AND functions similar to CPLD architectures. The -3 speed grade denotes the fastest commercial timing bin in the family, and the antifuse fabric provides inherent resistance to configuration upset compared to SRAM-based FPGAs.
Architecturally, the A42MX24 uses a 0.45 um process with combinatorial and sequential logic modules arranged in an efficient routed fabric, well suited to glue logic consolidation, bus interface bridging, and legacy PLD integration. According to Microchip product documentation, MX devices target high-volume, low-cost platforms where a reliable single-chip ASIC alternative is required.
Typical applications include industrial control systems, legacy PLD integration onto one device, 5V-tolerant bus interfacing, and defense/aerospace upgrade programs standardizing on proven MX silicon.
Design consideration: this part carries Last Time Buy lifecycle status per distributor data (lead time ~10 weeks), so new designs should evaluate the same-package A42MX16 PLCC-84 variants or plan lifetime buys accordingly.
直接替换替代料： A42MX24-3PLG84 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： A42MX24-3PLG84 （相同外形与封装尺寸） ——差异在于 Package, Family, System Gates, RoHS Status, Operating Temperature.
快速对比工具——选择替代料号进行并排对比：
A42MX16-3PLG84
✅ 直接替换✓ 有现货
$1 / 个
查看数据手册 →A42MX16-2PLG84I
✅ 直接替换✓ 有现货
$30.8 / 个
查看数据手册 →A42MX16-1PLG84
✅ 直接替换✓ 有现货
$44.2 / 个
查看数据手册 →A42MX16-FPLG84
✅ 直接替换✓ 有现货
$21.5 / 个
查看数据手册 →A42MX36-3PLG84
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
A42MX24-3PLG84I
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$43.5 / 个
查看数据手册 →A42MX24-3PLG84 最大额定值与电气特性
| Family | MX (42MX) |
| System Gates | 36000 gates |
| Logic Cells | 912 |
| User I/O | 72 |
| Speed Grade | -3 (fastest commercial) |
| Supply Voltage (Core) | 3 V to 3.6 V |
| Supply Voltage (I/O) | 4.75 V to 5.25 V |
| Process Technology | 0.45 um |
| 封装 | 84-PLCC (J-Lead), 29.31 x 29.31 mm |
| 安装类型 | Surface Mount |
| 工作温度 | 0C to +70C (TA) |
| Programmability | Antifuse (non-volatile) |
| Packaging | Tray |
| RoHS 状态 | ROHS3 Compliant |
| Lead Free | Yes |
| Manufacturer Lead Time | 10 weeks |
| Product Status | Last Time Buy |
A42MX24-3PLG84 引脚配置
| 引脚 1 | IO — User input/output (5V-tolerant, PLG84 pin assignment per DS2136) |
| 引脚 10 | VCC — Core supply, 3.0V to 3.6V |
| 引脚 21 | GND — Ground |
| 引脚 22 | VCI — I/O supply, 4.75V to 5.25V |
| 引脚 31 | TCK — JTAG test clock |
| 引脚 32 | TDI — JTAG test data in |
| 引脚 42 | TDO — JTAG test data out |
| 引脚 43 | TMS — JTAG test mode select |
| 引脚 52 | IO — User input/output |
| 引脚 63 | IO — User input/output |
| 引脚 73 | CLK — Dedicated clock input |
| 引脚 84 | IO/GND — User I/O or ground pin per DS2136 pinout table |
典型应用
A42MX24-3PLG84 适用于 6 应用s: Legacy PLD Integration, Industrial Control and Automation, Single-Chip ASIC Alternative, 5V-Tolerant Bus Interfacing, Defense and Aerospace Legacy Upgrades, Test and Measurement Equipment.
Legacy PLD Integration
The MX family was explicitly designed to consolidate multiple legacy PLDs, GALs, and 22V10-class devices into a single low-cost chip. The A42MX24's 36K gates and 912 cells provide ample capacity for several mid-size PLD functions, while its 5V-tolerant I/O directly interfaces with the 5V buses these legacy parts typically occupy. Because the antifuse fabric is non-volatile, no configuration PROM or microcontroller boot logic is needed, simplifying the upgrade path. D-modules provide wide-decode AND functions that efficiently replace the wide-input product-term structures of older CPLDs.
推荐
Industrial Control and Automation
In industrial controllers, the A42MX24-3PLG84 implements state machines, I/O expansion, and bus glue logic with deterministic timing from the antifuse fabric. The dual-rail 3.3V core / 5V I/O arrangement lets it bridge modern 3.3V controllers to legacy 5V sensors and actuators without level shifters on up to 72 I/O pins. The 84-PLCC through-style J-lead package is field-serviceable from a socket, an advantage in repairable industrial equipment. Note the 0C to +70C commercial range limits use to conditioned environments; use the -I industrial variant for extended temperature.
推荐
Single-Chip ASIC Alternative
Microchip positions MX FPGAs as a reliable single-chip ASIC alternative for medium-volume products where ASIC NRE is unjustifiable. The A42MX24 offers 36,000 system gates of one-time-programmable logic with full programming security - antifuse bits cannot be read back, protecting IP better than SRAM FPGAs. The -3 speed grade delivers the fastest MX timing for demanding glueless interfaces. Compared with mask ASICs, the MX approach has zero NRE, weeks-not-months turnaround, and survives the obsolescence of the A42MX24 via lifetime buys.
推荐
5V-Tolerant Bus Interfacing
The A42MX24's 5.0V-tolerant I/O architecture makes it a natural bridge between 3.3V and 5V logic domains. With 72 user I/O powered from a 4.75-5.25V rail, it can directly receive 5V TTL signals while its 3.3V core keeps internal power low. Typical uses include VME/ISA-style backplane interfaces, 5V memory bus translation, and interfacing to legacy microprocessors. Designers should confirm per-bank current limits and add series termination on backplane lines; the datasheet DS2136 provides I OH/I OL and timing specs for the -3 grade under 5V conditions.
推荐
Defense and Aerospace Legacy Upgrades
Antifuse FPGAs are favored in defense upgrade programs because they are immune to configuration upset and resistant to radiation-induced bit flips compared to SRAM fabrics. Programs that standardized on Actel MX silicon continue to use the A42MX24 for obsolescence-driven redesigns, weapon-system sustainment, and avionics retrofits where re-qualification of a new FPGA family is prohibitively expensive. The Last Time Buy status makes lifetime procurement planning essential; Microchip and distributors such as Microchip USA support end-of-life buy schedules for such programs.
推荐
Test and Measurement Equipment
Bench and rack instruments use the A42MX24 for deterministic timing chains, trigger logic, and interface translation where the fixed routing delays of antifuse fabric provide repeatable skew performance unavailable in reprogrammable SRAM FPGAs. The 72 I/O and wide-decode D-modules implement fast address decoders and comparison logic with CPLD-like speed. The socketed 84-PLCC package simplifies field firmware behavior changes (a new programmed device can be swapped in). Commercial 0-70C rating suits laboratory environments typical of T&M deployments.
推荐
推荐产品汇总
工程参考数据： A42MX24-3PLG84 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | A42MX16-3PLG84 | A42MX16-2PLG84I | A42MX16-1PLG84 | A42MX16-FPLG84 | A42MX36-3PLG84 |
|---|---|---|---|---|---|---|
| Package | 84-PLCC (J-Lead), 29.31x29.31 mm | 84-PLCC (J-Lead) - same | 84-PLCC (J-Lead) - same | 84-PLCC (J-Lead) - same | 84-PLCC (J-Lead) - same | 84-PLCC (J-Lead) - same |
| Brand | Microchip Technology (Microsemi/Actel MX) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| System Gates | 36,000 | 16,000 | 16,000 | 16,000 | 16,000 | 36,000-54,000 |
| Speed Grade | -3 (fastest) | -3 | -2 | -1 | F (standard) | -3 |
| Operating Temperature | 0C to +70C | 0C to +70C | -40C to +85C (industrial) | 0C to +70C | 0C to +70C | 0C to +70C |
| Lifecycle Status | Last Time Buy | Active/limited | Active/limited | Active/limited | Active/limited | Last Time Buy/limited |
关键差异点
- Largest capacity in the PLCC-84 MX footprint （对比 A42MX16-3PLG84)
- Fastest MX timing bin （对比 A42MX16-2PLG84I)
- 5V-tolerant non-volatile antifuse fabric （对比 Cross-brand SRAM FPGAs (Xilinx/Intel))
设计说明
The A42MX24-3PLG84 requires two independent rails: 3.0-3.6V core (VCC) and 4.75-5.25V I/O (VCI). Power the core rail before or simultaneously with the I/O rail. Decouple each rail with 0.1 uF ceramic capacitors at every supply pin plus bulk 10 uF. Antifuse devices draw negligible static current, so thermal design is dominated by I/O switching, not core logic.
MX devices are one-time-programmable: a programming error cannot be corrected in-system. Verify the design in simulation and, where possible, on a larger MX device before committing antifuse programming. Also note Last Time Buy status - secure program files, programmer availability (Silicon Sculptor), and spare programmed devices for the product lifetime.
The 84-PLCC J-lead package suits socketed field-serviceable boards but has higher lead inductance than QFP/BGA alternatives. For clocked designs near the -3 grade timing limits, keep clock traces short, use a dedicated clock input pin, and add series damping resistance (22-33 ohm) on fast output lines to control ringing from PLCC lead inductance.
The 5V I/O rail drives fast edges into backplane or cable loads. Add series termination at the FPGA output for point-to-point lines longer than ~10 cm, and confirm datasheet I OL/I OH budgets (DS2136) when bussing many loads. Unused I/O should be configured as inputs with pull-downs per the datasheet guidance.
合规信息
ROHS3 Compliant per Microchip USA distributor product page. AEC-Q100 qualification data not found in provided sources; an automotive-grade 40MX/42MX datasheet exists, but qualification status of this specific ordering code is unverified.
