PIC18C801T-I/L - 25MHz 8-Bit ROMless MCU 84-PLCC | Microchip
料号： PIC18C801T-I/L ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $13.5 | $13.50 |
| 10 | $12.2 | $122.00 |
| 100 | $10.85 | $1,085.00 |
| 500 | $9.6 | $4,800.00 |
| 1,000 | $8.5 | $8,500.00 |
PIC18C801T-I/L 概述
Background: An 8-bit microcontroller (MCU) is a self-contained computing element that integrates a CPU, RAM, peripheral set, and interrupt controller on a single die. PIC18C-series MCUs sit in Microchip's high-performance 8-bit hierarchy: PIC10/12/16 baseline -> PIC17 mid-range -> PIC18 high-end (RISC, 16-bit instructions, hardware multiplier). The PIC18C family predates PIC18F flash parts and is ROMless, so program code is fetched from an external EPROM or flash memory over a parallel bus. The PIC18C801 is the highest-pin-count member of the family and is specifically designed for external-memory systems that need abundant I/O and large code spaces beyond what on-chip flash can hold.
Key features of the PIC18C801T-I/L include 84 pins in the PLCC J-lead package, 25 MHz maximum clock, industrial -40°C to +85°C temperature range, ROMless external-memory interface, and compatibility with the PIC18C instruction set. Tape-and-reel packaging supports high-volume surface-mount assembly. The "T" suffix indicates tape and reel orientation, while "I" denotes the industrial temperature grade. The "/L" suffix denotes the PLCC J-lead package.
Typical applications include industrial automation controllers, consumer electronics with external program memory, automotive body and chassis control modules, and embedded systems requiring large external code spaces. Engineers choose the PIC18C801T-I/L when on-chip flash is insufficient and an external memory bus is required.
Design consideration: when migrating to modern alternatives, verify that the replacement exposes a compatible external-memory bus or implements an equivalent on-chip flash density, and confirm interrupt and peripheral register compatibility. PIC18C parts are now legacy; PIC18F or dsPIC33 families typically offer pin-compatible migration paths. Always consult the Microchip PIC18C801 errata sheet for known operational differences before committing to a new design.
直接替换替代料： PIC18C801T-I/L ——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： PIC18C801T-I/L （相同外形与封装尺寸） ——差异在于 Package, Program Memory Type, Operating Temperature, Number of I/O Pins, Program Memory Size.
快速对比工具——选择替代料号进行并排对比：
PIC18C801-I/L
✅ 直接替换✓ 有现货
$6.25 / 个
查看数据手册 →PIC18C801T-I/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$5.99 / 个
查看数据手册 →PIC18C658T-I/PT
✅ 直接替换✓ 有现货
$6.85 / 个
查看数据手册 →PIC18C601-I/PT
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$6.08 / 个
查看数据手册 →PIC18C452T-E/L
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$13.1 / 个
查看数据手册 →PIC18C801T-I/L 最大额定值与电气特性
| Core | PIC18 8-bit RISC |
| 数据总线宽度 | 8-bit |
| 最大时钟频率 | 25 MHz |
| Program Memory Type | ROMless (external memory bus) |
| Program Memory Size | ROMless (external) |
| Supply Voltage (Vdd) | 4.2 V to 5.5 V |
| 工作温度 | -40°C to +85°C (industrial) |
| Temperature Grade | Industrial |
| 封装 | 84-pin PLCC (J-Lead, 29.31x29.31 mm) |
| Package Code | QCCJ (square, J-bend) |
| Terminal Form | J-Bend |
| Number of Terminals | 84 |
| 安装方式 | Surface Mount |
| Packaging | Tape and Reel |
PIC18C801T-I/L 引脚配置
| 引脚 1 | [DATA_NEEDED] — Pin function depends on datasheet pinout; consult PIC18C801 datasheet |
| 引脚 2 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 3 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 4 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 5 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 6 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 7 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 8 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 9 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 10 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 11 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 12 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
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| 引脚 20 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 21 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 22 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 23 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 24 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
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| 引脚 31 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
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| 引脚 36 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
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| 引脚 38 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 39 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 40 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 41 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 42 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
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| 引脚 48 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
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| 引脚 50 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 51 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 52 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 53 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 54 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 55 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 56 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 57 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 58 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 59 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 60 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
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| 引脚 66 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 67 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 68 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
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| 引脚 76 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
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| 引脚 79 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 80 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 81 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 82 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 83 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
| 引脚 84 | [DATA_NEEDED] — Pin function depends on datasheet pinout |
典型应用
PIC18C801T-I/L 适用于 6 应用s: Industrial Automation Controllers, Consumer Electronics with External Firmware, Automotive Body and Chassis Control, Embedded Systems with Large External Code Spaces, Legacy Test and Measurement Equipment, Medical Device Controllers (Legacy).
Industrial Automation Controllers
The PIC18C801T-I/L suits industrial PLC interface modules and machine controllers that need more program space than on-chip flash can hold. The 25 MHz core and 4.2V-5.5V supply pair with the ROMless external memory bus, allowing systems to address large ladder-logic or recipe databases in external EPROM/flash. Industrial temperature rating -40°C to +85°C covers factory-floor cabinets, and the 84-pin PLCC J-lead package supports socketed field replacement on legacy lines still in service after 15+ years of operation.
推荐
Consumer Electronics with External Firmware
The PIC18C801T-I/L fits consumer devices such as high-end audio controllers, washing-machine HMIs, and appliance motor controllers that require external program memory for localization variants. The ROMless parallel bus lets manufacturers store multiple language firmware images in external flash and select at boot. With 25 MHz throughput the part handles button-matrix scanning, LCD driving, and simple protocol stacks, while the 84-PLCC J-lead package simplifies through-hole-friendly surface-mount assembly for consumer appliance contract manufacturers.
推荐
Automotive Body and Chassis Control
The PIC18C801T-I/L is used in automotive body-control modules, instrument clusters, and chassis controllers where PIC18C designs were qualified decades ago. The industrial -40°C to +85°C range covers cabin environments, and the 5V supply rails integrate with existing 12V->5V vehicle power trees. The 84-PLCC J-lead package tolerates the under-dash thermal environment and supports socketed service replacement. New automotive designs should target AEC-Q100 qualified parts, but the PIC18C801T-I/L keeps legacy platforms running until end-of-production.
推荐
Embedded Systems with Large External Code Spaces
The PIC18C801T-I/L targets embedded systems needing program space beyond on-chip flash, such as protocol bridges, multi-language industrial HMIs, and firmware-update gateways. Its parallel external memory bus addresses up to 2 MB of external program memory, allowing in-field firmware upgrades stored in external flash. The 25 MHz core runs compressed protocol stacks and the 84-PLCC J-lead package simplifies PCB layout compared to QFP equivalents. Use this part when on-chip flash is too small and external memory is acceptable.
推荐
Legacy Test and Measurement Equipment
The PIC18C801T-I/L is found in legacy test and measurement instruments, lab data loggers, and bench-top analyzers designed in the late 1990s and 2000s. The ROMless architecture lets manufacturers ship multiple firmware personalities in external memory, and the 25 MHz core handles sensor sampling and display refresh cycles. The 84-PLCC J-lead package supports field-replaceable modules that technicians can swap without soldering. Sustainment programs for in-service T&M equipment rely on this part until modernization refresh cycles are funded.
推荐
Medical Device Controllers (Legacy)
The PIC18C801T-I/L appears in legacy medical device controllers and patient-monitoring peripherals that were designed and qualified before modern MCU migration cycles. The industrial temperature grade and 5V supply cover most clinical environments, and the ROMless external memory interface supports regulator-required firmware revision tracking stored externally. The 84-PLCC J-lead package enables socketed replacement during scheduled service. New medical designs should target modern PIC18F or dsPIC33 parts with current regulatory documentation.
推荐
推荐产品汇总
工程参考数据： PIC18C801T-I/L ——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 | PIC18C801-I/L | PIC18C801T-I/PT | PIC18C658T-I/PT | PIC18C601-I/PT | PIC18C452T-E/L |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 84-PLCC (J-Lead) | 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 |
| Maximum Clock Frequency | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 40 MHz (PIC18C452 family) |
| Program Memory Type | ROMless (external bus) | ROMless (external bus) | ROMless (external bus) | ROMless (external bus) | ROMless (external bus) | On-chip EPROM |
| Supply Voltage | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V | 4.2 V to 5.5 V |
| Operating Temperature | -40°C to +85°C (industrial) | -40°C to +85°C (industrial) | -40°C to +85°C (industrial) | -40°C to +85°C (industrial) | -40°C to +85°C (industrial) | -40°C to +125°C (extended) |
| Pin Count | 84 | 84 | 84 | 84 | 84 | 84 |
| Delivery Packaging | Tape & Reel | Tube | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | NRND |
关键差异点
- Identical silicon in tube packaging （对比 PIC18C801-I/L)
- External memory bus for large code spaces （对比 PIC18C452T-E/L)
- Industrial temperature grade coverage （对比 PIC18C452T-E/L)
设计说明
The PIC18C801T-I/L operates from a 4.2V to 5.5V supply; design the 5V rail with a linear regulator capable of at least 50 mA continuous current with adequate bulk decoupling (10 uF + 100 nF) on the Vdd pins. Because the part is ROMless, the external memory bus also draws supply current; budget 100-150 mA total for MCU plus external EPROM/flash. Add a power-on reset supervisor if the application needs deterministic startup, since legacy PIC18C devices have limited internal POR tolerance.
Route the external memory bus (address, data, and control lines) with matched trace lengths and a ground reference plane to avoid bus timing violations. Estimated bus timing: at 25 MHz with 4-clock instruction cycles, the external memory access window is approximately 160 ns; keep bus traces under 50 mm and add 22-33 ohm series termination on data lines if reflections appear on the scope. Place the external memory device adjacent to the PIC18C801T-I/L to minimize stub lengths and bus capacitance.
Do not assume the PIC18C801T-I/L is pin-compatible with newer PIC18F devices; PIC18C parts lack internal flash and rely on an external memory bus, so firmware migration to PIC18F requires both hardware and software rework. Always consult the Microchip PIC18C801 errata sheet before finalizing a design, since legacy silicon revisions occasionally have minor operational differences. For new designs, evaluate PIC18F or dsPIC33 alternatives first; reserve PIC18C801T-I/L for legacy sustainment only.
合规信息
RoHS, REACH, lead-free, halogen-free, and conflict-mineral status not present in the verified data; consult Microchip product page or PIC18C801 datasheet for current compliance declarations. Part is NRND per Microchip lifecycle policy and not AEC-Q100 qualified; PIC18C industrial grade is -40C to +85C only.
