PIC18C858T-E/L - 8-Bit 32KB OTP MCU w/ CAN, 84-PLCC | Microchip
MPN: PIC18C858T-E/L ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $14.5 | $14.50 |
| 10 | $13.2 | $132.00 |
| 100 | $11.85 | $1,185.00 |
| 500 | $10.4 | $5,200.00 |
| 1,000 | $9.1 | $9,100.00 |
PIC18C858T-E/L Overview
Background: PIC18C-series microcontrollers belong to the 8-bit microcontroller family built on a Harvard RISC architecture. They sit below 16-bit dsPIC and 32-bit MCU families in the embedded hierarchy, and the PIC18C line was Microchip's first 8-bit family with built-in CAN 2.0B and a C-friendly instruction set. Engineers historically chose PIC18C parts for high-pin-count industrial and automotive networking designs where on-chip CAN replaced an external controller and the 32KB OTP program space allowed moderate firmware size without external memory.
Key features include 32KB (16K x 16) on-chip OTP program memory, 4 Kbytes of linear data memory, 10-bit analog-to-digital conversion peripherals, on-chip CAN module, USART, I2C/SPI, capture/compare/PWM modules, and an extended -40C to +125C operating temperature range designated by the "E" suffix. The "T" suffix indicates tape-and-reel packaging, while "/L" denotes the 84-pin PLCC (J-lead) form factor.
Typical applications include industrial CAN-node controllers, automotive body and chassis networking, sensor hubs, building automation, embedded control with on-chip ADC, and legacy designs originally architected around the PIC18C family. The high pin count supports external memory and parallel bus expansion.
When designing with this part, note that PIC18C858 OTP parts cannot be reprogrammed in-circuit beyond the OTP window; a windowed ceramic EPROM version is required for development iteration. Verify all timing, supply, and CAN-bus electrical parameters against the manufacturer datasheet before production release.
This page synthesizes distributor pricing snapshots, drop-in same-brand and cross-brand alternatives in the 84-PLCC footprint, and practical design notes not found in the manufacturer datasheet, helping engineers evaluate sourcing risk and migration paths for this legacy Microchip part.
Drop-in alternatives for PIC18C858T-E/L — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC18C858T-E/L (same form factor and footprint) — differing in Operating Temperature, Package, Program Memory Size, Program Memory Type, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC18C858T-I/L
✅ Drop-In✓ In Stock
$9.2 / Unit
View Datasheet →PIC18C858-E/L
✅ Drop-In📋 Reference alternative (not in catalog)
PIC18C858T-E/PT
✅ Drop-In✓ In Stock
$8.95 / Unit
View Datasheet →PIC18C658T-E/L
✅ Drop-In✓ In Stock
$6.75 / Unit
View Datasheet →PIC18C801-I/PT
✅ Drop-In✓ In Stock
$4.25 / Unit
View Datasheet →PIC18C858T-E/L Maximum Ratings & Electrical Characteristics
| Family | PIC® 18C |
| Series | PIC18C858 |
| Core | 8-bit PIC RISC Harvard |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 32 KB (16K x 16) |
| Data Memory Addressing | Linear up to 4 Kbytes |
| Maximum Clock Frequency | 40 MHz |
| Supply Voltage | 5 V |
| ADC | 10-bit |
| On-chip CAN Module | Yes (CAN 2.0B) |
| Operating Temperature | -40C to +125C (E suffix) |
| Package | 84-PLCC (J-Lead) |
| Packaging Form | Tape & Reel (T suffix) |
| Mounting Type | Surface Mount |
| Instruction Set Optimization | C-compiler optimized architecture |
PIC18C858T-E/L 84-plcc (j-lead) Pin Configuration Guide
Pin configuration for PIC18C858T-E/L (84-plcc (j-lead) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for PIC18C858T-E/L.
Refer to the datasheet for full pin configuration.
Typical Applications
PIC18C858T-E/L is suitable for 6 applications: Industrial CAN-Node Controllers, Automotive Body and Chassis Networking, Sensor Hub Aggregators, Building Automation Gateways, Embedded Control with On-chip ADC, Legacy Production Replacement / Maintenance.
Industrial CAN-Node Controllers
The PIC18C858T-E/L is well-suited for industrial CAN-node controllers because of its on-chip CAN 2.0B controller, 32KB OTP program memory, and 84-pin PLCC package that exposes all CAN, USART, SPI, and I2C peripherals. At 40 MHz the part delivers 10 MIPS instruction throughput, sufficient for CAN-bit-timing precision in DeviceNet and CANopen stacks. The extended -40C to +125C temperature range (E suffix) supports factory-floor environments without additional thermal qualification. Place the part on a 4-layer PCB with a dedicated ground plane under the PLCC socket and use 100 nF decoupling on each VDD/VSS pair within 5 mm of the leads. Compared with newer PIC18F flash parts, the OTP memory forces production-grade firmware only - development iteration requires the EPROM windowed variant.
Recommended
Automotive Body and Chassis Networking
The PIC18C858T-E/L was historically deployed in automotive body controllers, door modules, and chassis sensor hubs because of its CAN 2.0B integration and high pin count supporting multiple sensor inputs. Its 32KB OTP accommodates the larger protocol stacks typical of body-control modules, and the -40C to +125C temperature range meets AEC-Q100-style automotive under-hood thermal stress. The 10-bit ADC handles battery-voltage and temperature-sensor conditioning directly without external ADCs. For new automotive designs, however, Microchip recommends migrating to AEC-Q100-qualified flash parts such as PIC18F46K22 because OTP cannot be re-qualified for field updates, and AEC-Q100 PPAP documentation is not available for legacy PIC18C OTP devices.
Recommended
Sensor Hub Aggregators
With 32KB OTP, an integrated 10-bit ADC, and on-chip CAN, the PIC18C858T-E/L was commonly used as a sensor-hub aggregator in industrial building-automation and HVAC controllers. The 84-pin PLCC provides sufficient I/O to read multiple analog sensor channels and drive relays or triac outputs without external multiplexers. At 40 MHz the MCU can sample, filter, and CAN-transmit several sensor channels within sub-millisecond cycles, ideal for closed-loop building automation. The lack of in-circuit debug on OTP parts forces production-grade firmware; developers should validate firmware on the windowed EPROM variant (PIC18C858T-E/L not windowed) or migrate to a flash sibling before committing to PCB layout.
Recommended
Building Automation Gateways
Building-automation gateways deployed in the early 2000s frequently used the PIC18C858T-E/L because of its CAN 2.0B interface combined with USART, SPI, and I2C peripherals - enabling multi-protocol bridging between CAN-based sensor networks and RS-485 / RS-232 backhauls. The 32KB OTP stores bridging firmware, and the 84-PLCC package provides enough I/O for status LEDs, mode switches, and multiple communication ports. For retrofit or service replacement of legacy installations, the PIC18C858T-E/L remains in third-party channel stock as of 2026-09-26, but new installations should target PIC18F-series flash parts to avoid obsolescence supply risk.
Recommended
Embedded Control with On-chip ADC
Industrial motor-control and process-control embedded systems often leverage the PIC18C858T-E/L's 10-bit ADC and 32KB OTP program memory for moderate-precision closed-loop control. At 40 MHz the MCU can execute a PID loop at kHz rates while servicing the on-chip CAN module for networked control. The 84-PLCC package exposes the full PWM and capture/compare peripheral set, allowing direct drive of power-stage FETs without external logic. Designers should add TVS protection on the analog inputs and route the ADC reference pin with a low-impedance trace to avoid 10-bit conversion drift under switching transients.
Recommended
Legacy Production Replacement / Maintenance
Many factory-floor machines deployed in the 2000s still rely on PIC18C858T-E/L boards, and as the part is obsolete from Microchip but remains in third-party stock, repair depots continue to source it as a maintenance replacement. The 84-PLCC socket allows field swap without desoldering. Engineers performing long-term support should verify each replacement unit's date code and OTP virginity, because used pulled parts may contain prior firmware. For at-risk installations, migrating the legacy PCB to PIC18F8525 with an 80-TQFP-to-84-PLCC adapter footprint enables flash reprogramming in the field and removes the obsolescence supply cliff.
Recommended
Recommended Products Summary
Engineering reference data for PIC18C858T-E/L — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18C858T-I/L | PIC18C858-E/L | PIC18C858T-E/PT | PIC18C658T-E/L | PIC18C801-I/PT |
|---|---|---|---|---|---|---|
| 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 | 80-TQFP - different footprint | 84-PLCC (J-Lead) - same | 80-TQFP - different footprint |
| Operating Temperature | -40C to +125C (E) | -40C to +85C (I) | -40C to +125C (E) | -40C to +125C (E) | -40C to +125C (E) | -40C to +85C (I) |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Key Differentiators
- Industry-standard 84-PLCC footprint with J-leads (vs PIC18F8525)
- On-chip CAN 2.0B controller eliminates external CAN IC (vs PIC18F46J50 (no CAN))
- 32 KB OTP program memory with linear addressing (vs PIC18C658T-E/L)
Design Notes
PIC18C858T-E/L is OTP memory - firmware cannot be re-flashed in production. A windowed EPROM variant must be used for development, or development must move to a PIC18F-series flash sibling such as PIC18F8525. Field firmware updates are impossible, so the production firmware image must be 100% validated before OTP programming.
The 84-pin PLCC package is a socket-compatible through-hole-style SMT form factor - if used without a socket, ensure the PCB land pattern follows JEDEC PLCC-84 standards with proper pad dimensions. Place a 100 nF decoupling capacitor within 5 mm of each VDD/VSS pair, and add a 10 uF bulk capacitor near the package to support ADC reference stability during switching events.
The PIC18C858 family is obsolete per Microchip's official product page, and a newer replacement PIC18F8525 is recommended. Plan PCB redesign to migrate to PIC18F8525 (80-TQFP package, requires layout rework) or qualify a same-package PIC18C alternative such as PIC18C658T-E/L (84-PLCC, 16KB OTP) for at-risk installations.
Compliance Information
PIC18C858T-E/L is an obsolete OTP part; AEC-Q100 PPAP documentation is not available. RoHS, REACH, lead-free, and halogen-free status are not confirmed in the verified distributor data; engineers should request a compliance certificate from the third-party stock supplier before RoHS-critical production use.
