PIC16F18345T-H/SSVAO - 14KB Flash 8-bit MCU, High-Temp SSOP-20 | Microchip
MPN: PIC16F18345T-H/SSVAO β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.66 | $26.60 |
| 100 | $2.37 | $237.00 |
| 500 | $2.13 | $1,065.00 |
| 1,000 | $1.89 | $1,890.00 |
PIC16F18345T-H/SSVAO Overview
A PIC microcontroller is a compact, programmable embedded computing device that integrates a CPU, non-volatile Flash memory, RAM, data EEPROM, and a rich set of analog and digital peripherals onto a single silicon die. Within the embedded hierarchy, PIC microcontrollers sit below general-purpose microprocessors and above discrete logic: they execute firmware stored in Flash, drive GPIOs and communication peripherals (UART, SPI, I2C), and provide on-chip ADC, comparators, PWM and timing resources so the same chip can replace multiple analog and logic ICs in a design.
Key differentiating features of this part include Peripheral Pin Select (PPS), which lets the user remap most digital peripherals to a wide choice of physical pins for board-layout flexibility, Core Independent Peripherals (CIPs) such as CLC, NCO, DSM and Configurable Logic Cells that offload tasks from the CPU, and eXtreme Low Power (XLP) technology with deep-sleep currents in the nanoampere range. The device integrates a 10-bit ADC with Computation (ADC2) for automated averaging, threshold comparison, and oversampling.
The architecture combines a RISC instruction set with single-cycle execution except for branches, a vectored interrupt controller, and hardware-accelerated math and signal-conditioning blocks. The high-temperature VAO characterization extends the qualified junction-temperature range beyond the standard -40C to +125C industrial window.
Typical applications include automotive body and comfort ECUs, sensor-interface modules, battery-management sub-assemblies, industrial sensor nodes, low-power IoT edge devices, and white-goods control boards where footprint, peripheral integration, and temperature tolerance matter.
When designing with the PIC16F18345T-H/SSVAO, remember that the 'H' temperature grade changes the analog and timing characterization versus the standard 'I' grade; consult the dedicated high-temperature datasheet (DS40002024) for thermal and AC/DC derating curves before committing the layout.
This page synthesizes distributor pricing, drop-in alternative listings, and practical design notes not found in the manufacturer datasheet, sourced from Microchip, DigiKey, Mouser and trusted distributor catalogs as of 2026-09-20.
Drop-in alternatives for PIC16F18345T-H/SSVAO β 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 PIC16F18345T-H/SSVAO (same form factor and footprint) β differing in ADC, Package, Data EEPROM, Communication Peripherals, Core Architecture.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16F18345T-I/SS
β Drop-Inβ In Stock
$1.02 / Unit
View Datasheet βPIC16F18345T-E/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16F18345-I/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16F18344T-I/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16F18325T-I/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16F18345T-H/SSVAO Maximum Ratings & Electrical Characteristics
| Core | PIC16 enhanced mid-range 8-bit RISC |
| Program Memory (Flash) | 14 KB |
| Data SRAM | 1 KB |
| Data EEPROM | 256 bytes |
| Operating Voltage Range | 2.3 V to 5.5 V |
| Maximum CPU Clock | 32 MHz (8 MIPS) |
| Package | 20-pin SSOP (SS) |
| Pin Count | 20 |
| ADC | 10-bit ADC with Computation (ADC2) |
| Temperature Grade | H - High Temperature (Automotive VAO) |
| Peripheral Pin Select (PPS) | Yes |
| Core Independent Peripherals | CLC, NCO, DSM, Configurable Logic Cell |
| eXtreme Low Power (XLP) | Yes (nanoamp sleep currents) |
| Communication Peripherals | UART, SPI, I2C |
| PWM Outputs | Yes (multiple CCP/ECCP channels) |
| Mounting Type | Surface Mount |
| MSL Level | 3 (168 hours) |
| RoHS Status | Compliant |
PIC16F18345T-H/SSVAO Pin Configuration
| Pin 1 | RA3/AN3/VPP/MCLR β GPIO / ADC input / programming high voltage / master clear reset (active low) |
| Pin 2 | RA4/AN4 β GPIO / ADC input |
| Pin 3 | RA5/AN5 β GPIO / ADC input |
| Pin 4 | RA0/AN0 β GPIO / ADC input |
| Pin 5 | RA1/AN1 β GPIO / ADC input |
| Pin 6 | RA2/AN2 β GPIO / ADC input |
| Pin 7 | VSS β Ground reference |
| Pin 8 | RA7 β GPIO only |
| Pin 9 | RA6 β GPIO only |
| Pin 10 | RC0 β GPIO / PPS-remappable peripheral |
| Pin 11 | RC1 β GPIO / PPS-remappable peripheral |
| Pin 12 | RC2 β GPIO / PPS-remappable peripheral |
| Pin 13 | RC3 β GPIO / PPS-remappable peripheral |
| Pin 14 | RC4 β GPIO / PPS-remappable peripheral |
| Pin 15 | RC5 β GPIO / PPS-remappable peripheral |
| Pin 16 | RC6 β GPIO / PPS-remappable peripheral |
| Pin 17 | RC7 β GPIO / PPS-remappable peripheral |
| Pin 18 | OSC2/CLKOUT β Crystal output / clock output |
| Pin 19 | OSC1/CLKIN β Crystal input / external clock input |
| Pin 20 | VDD β Positive supply voltage (2.3V to 5.5V) |
Typical Applications
PIC16F18345T-H/SSVAO is suitable for 6 applications: Automotive Body and Comfort ECU, Industrial Sensor Interface Module, Battery-Management Sub-Assembly, Low-Power IoT Edge Node, White-Goods Control Board, Portable Medical Monitoring Accessory.
Automotive Body and Comfort ECU
The PIC16F18345T-H/SSVAO fits automotive body and comfort modules such as seat controllers, mirror adjusters, and HVAC flap drivers because it combines a 14KB Flash firmware budget, 1KB SRAM for protocol stacks, and the H-temperature VAO qualification that survives underhood thermal stress. The 10-bit ADC with Computation (ADC2) handles multiple analog sensor inputs (NTC temperature, position feedback) with built-in averaging to reduce CPU wakeups. Core Independent Peripherals like the Configurable Logic Cell (CLC) implement window-watchdog and wake-on-event logic without firmware intervention, allowing the CPU to remain in nanoamp sleep for most of the duty cycle. The 20-pin SSOP package keeps the PCB small enough to fit inside actuator housings while exposing enough I/O for CAN-transceiver handshake signals and motor-driver PWM.
Recommended
Industrial Sensor Interface Module
For industrial 4-20mA sensor transmitters, pressure-sensor conditioning boards, and analog front-end modules, the PIC16F18345T-H/SSVAO provides a 10-bit ADC with Computation (ADC2) that performs hardware oversampling and threshold detection offloaded from the CPU. Peripheral Pin Select (PPS) lets the designer route SPI to the MISO/MOSI pins and UART to the RS-485 interface without swapping the IC, simplifying layout for space-constrained sensor enclosures. The H-grade temperature qualification supports deployment near motors, heaters, and outdoor cabinets. Nanoamp XLP sleep currents allow battery- or energy-harvest-powered wireless sensor nodes to run for years on a single primary cell while still waking on a CLC-configured edge event.
Recommended
Battery-Management Sub-Assembly
Inside a battery-management sub-assembly or smart-battery-pack monitor, the PIC16F18345T-H/SSVAO provides a low-power supervisory controller that reads cell voltages through its 10-bit ADC, balances cells through PWM-driven MOSFETs, and communicates with the host BMS over UART or I2C. The 256-byte EEPROM stores lifetime cycle counts, calibration constants, and authentication tokens across power cycles without a separate memory IC. XLP sleep with peripheral run mode keeps quiescent current below 1 uA between cell-voltage scans, extending pack runtime. The H-grade VAO qualification allows the same firmware and BOM to be reused across consumer and automotive-grade battery packs, simplifying platform engineering.
Recommended
Low-Power IoT Edge Node
The PIC16F18345T-H/SSVAO is well suited to wireless IoT edge nodes that pair a sub-GHz or BLE radio with on-board sensing: the PIC16 acts as the sensor-firmware host, periodically waking from XLP sleep to service the ADC, push measurements over SPI to a radio module, and return to nanoamp standby. The 1KB SRAM accommodates a small LoRaWAN or Zigbee MAC stack without overflowing, while 14KB Flash holds the application code, a tiny RTOS, and over-the-air update bootloader. PPS lets the designer place UART, SPI, and interrupts on any convenient pin, which is critical when the radio footprint dictates the antenna keep-out zone. The 2.3V-5.5V supply range permits direct operation from a single lithium primary or a regulated USB rail.
Recommended
White-Goods Control Board
Washing-machine, dishwasher, oven and refrigerator control boards benefit from the PIC16F18345T-H/SSVAO's combination of robust mixed-signal peripherals and high-temperature tolerance. The 10-bit ADC reads NTC temperature probes, water-level sensors, and motor-current shunts; the CLCs generate zero-cross detection for triac-driven heater elements without CPU overhead. The H-temperature grade tolerates the sustained thermal load inside an appliance cabinet or near a compressor. The 20-pin SSOP keeps the BOM cost low enough for high-volume consumer appliances while still providing enough pins for user-interface keypads, LED indicators, and a UART debug port for production testing.
Recommended
Portable Medical Monitoring Accessory
The PIC16F18345T-H/SSVAO is a strong fit for portable medical accessories such as pulse-oximeter probe boards, insulin-pen dose loggers, and wearable thermometer data loggers that demand both low power and reliability. The 14KB Flash runs a small RTOS plus signal-processing firmware, while the 10-bit ADC with Computation oversamples photodiode or thermistor signals to improve SNR before data reduction. Nanoamp XLP sleep enables weeks of standby on a coin cell between measurements, and EEPROM stores patient-side calibration data. Although the part is not FDA-cleared on its own, its H-grade thermal characterization supports enclosed-body-worn enclosures that warm above ambient skin temperature during continuous wear.
Recommended
Recommended Products Summary
Engineering reference data for PIC16F18345T-H/SSVAO β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F18345T-I/SS | PIC16F18345T-E/SS | PIC16F18345-I/SS | PIC16F18344T-I/SS | PIC16F18325T-I/SS |
|---|---|---|---|---|---|---|
| Package | SSOP-20 (Tape & Reel, VAO) | SSOP-20 - same | SSOP-20 - same | SSOP-20 (Tube) - same footprint | SSOP-20 - same | SSOP-20 - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Program Memory | 14 KB | 14 KB | 14 KB | 14 KB | 8 KB | 14 KB |
| Data SRAM | 1 KB | 1 KB | 1 KB | 1 KB | 512 B | 256 B |
| Data EEPROM | 256 B | 256 B | 256 B | 256 B | 256 B | 256 B |
| Maximum CPU Clock | 32 MHz (8 MIPS) | 32 MHz (8 MIPS) | 32 MHz (8 MIPS) | 32 MHz (8 MIPS) | 32 MHz (8 MIPS) | 32 MHz (8 MIPS) |
| Temperature Grade | H (High-Temperature VAO) | I (Industrial) | E (Extended) | I (Industrial) | I (Industrial) | I (Industrial) |
| Peripheral Pin Select (PPS) | Yes | Yes | Yes | Yes | Yes | Yes |
| Automotive VAO Process | Yes | No | No | No | No | No |
Key Differentiators
- High-temperature VAO automotive qualification in SSOP-20 (vs PIC16F18345T-I/SS)
- Larger SRAM and richer CIP set than the PIC16F18325T-I/SS (vs PIC16F18325T-I/SS)
- 14KB Flash matches the PIC16F18344T-I/SS but doubles the SRAM (vs PIC16F18344T-I/SS)
Design Notes
The PIC16F18345T-H/SSVAO is qualified to the H temperature grade with VAO automotive-process extension; however, thermal derating in the SSOP-20 package still applies. Estimated: at 5V supply, 32 MHz active mode, and typical GPIO toggling load, internal dissipation stays under 20 mW (theta_JA approximately 80 C/W for SSOP-20), giving a junction rise of roughly 1.6 C above ambient - well within the H-grade headroom. At sustained 125 C ambient, place thermal vias under the exposed die attach pad region and avoid placing the IC adjacent to high-current power devices. Always cross-check final thermal performance against the manufacturer high-temperature datasheet supplement DS40002024B.
Decouple VDD (pin 20) with a 100 nF X7R ceramic placed within 3 mm of the pin, and add a bulk 1-10 uF ceramic on the same rail. For XLP sleep-current-sensitive designs, prefer an MCP1700 LDO or similar low-Iq regulator because the PIC16F18345T-H/SSVAO itself can drop below 100 nA in deep sleep but a noisy regulator can defeat that. Place the decoupling loop area below 5 mm^2 to minimize parasitic inductance that couples switching noise into the ADC reference.
Route the crystal traces (OSC1/OSC2, pins 19/18) as short, symmetric pairs with a guard ground on both sides; keep them away from the ADC analog inputs to prevent clock coupling into ADC readings. Because the device supports Peripheral Pin Select (PPS), the UART/SPI/I2C functions can be remapped after layout - but the physical pinout of the SSOP-20 package is fixed, so the schematic symbol must reflect the package, not the firmware-remapped function. Provide a solid ground pour under the IC body and tie VSS (pin 7) directly to it with at least two vias for thermal and electrical continuity.
Estimated: a frequent mistake is substituting the H/SSVAO part with an I/SS part in production without re-running the high-temperature characterization - the I/SS part is rated only to +125 C, not the extended H window. Another common pitfall is forgetting that the device ships from Microchip with the internal 32 MHz HFINTOSC active by default; an external crystal is required only if your application needs a tighter frequency reference or lower long-term jitter. Finally, do not enable the MCLR function as a GPIO on pin 1 if the in-circuit serial programmer needs to drive VPP - configure MCLR mode in the configuration words to keep ISP functional.
Compliance Information
RoHS and lead-free per Microchip product page. VAO suffix indicates automotive-process qualification per Microchip's automotive quality flow (AEC-Q100 equivalent screening).
