PIC16LC770T-I/SS
PIC16LC770T-I/SS - 8-bit PIC MCU, 3.5KB OTP, 20MHz, SSOP-20 | Microchip
The Microchip Technology PIC16LC770T-I/SS is an 8-bit RISC PIC microcontroller housed in a 20-pin SSOP (Shrink Small Outline Package) and featuring an industry-standard PIC16 mid-range core running at up to 20 MHz. The part ships with 3.5 KB of OTP program memory (organized as 2K × 14 words) and 256 bytes of data RAM, providing enough headroom for compact embedded control loops. The "LC" prefix denotes the 3.0 V to 5.5 V wide operating voltage range, making the device compatible with both battery and regulated-rail designs, while the "-I" suffix indicates the industrial -40 °C to +85 °C temperature grade and the trailing "/SS" designates the SSOP-20 surface-mount package with Tape & Reel packaging (T suffix).
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral set on one die. PIC16 series MCUs from Microchip are RISC-based, meaning each instruction executes in one oscillator cycle except for program branches. The PIC16 mid-range family sits between the smaller PIC10/12 baseline parts and the PIC18 enhanced core; it is a workhorse for cost-sensitive, low-power consumer and industrial control such as appliance timers, sensor conditioning, and human-interface peripherals. The PIC16LC770 family extends the family with an enhanced USART, multiple timer modules, a 12-bit ADC, and capture/compare/PWM capability, which differentiates it from the smaller PIC16C7x baseline.
Key features of the PIC16LC770 include a 12-bit ADC with up to six input channels, an Enhanced USART supporting RS-232/RS-485, dual 8-bit timer/counters with dedicated prescalers, one 16-bit Capture/Compare/PWM module, and 16 digital I/O pins with individually programmable direction registers. The device also provides an internal watchdog timer with on-chip RC oscillator for unattended recovery, two on-chip analog comparators, and an external interrupt source. Brown-out Reset / Power-on Reset with on-chip POR timer ensures a known startup state on every power cycle.
Architecturally the PIC16LC770 uses a Harvard bus design with separate instruction and data paths, allowing instruction fetch and operand read to occur in parallel. The OTP program memory offers one-time-programmable storage, locking the firmware into the die once programmed, which is well-suited to production-cost-sensitive designs that do not require firmware upgrades. The wide 3.0 V to 5.5 V supply window lets the same part run from a 3.3 V digital rail, two alkaline cells, or a 5 V regulated bus. Two power-managed Idle and Sleep modes reduce quiescent current for battery-powered designs, with the analog peripherals shut down in Sleep to avoid false wakeups.
Typical applications include appliance control boards, sensor signal conditioning, low-speed serial bridge peripherals, industrial sensor interfaces, small human-interface controllers (keypads and LED indicators), and battery-operated handheld instruments. Designers favor the PIC16LC770 when they need more peripheral capability than the PIC16C711 but do not need the larger flash and code memory of a PIC18 or PIC24 device. Compared to flash-based siblings such as the PIC16F716, the OTP variant lowers per-unit cost in mature, unchanging firmware designs at the expense of field upgradability.
For successful design-in, ensure the brown-out voltage is configured above the lowest expected supply rail and that the watchdog timer is enabled for any unattended deployment. The enhanced USART supports both synchronous and asynchronous modes, but its baud-rate generator relies on the system oscillator; an external crystal is recommended when RS-485 timing tolerance is tighter than ±2 %.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet, including a comparison_table that lines up package, memory, and ADC parameters against verified pin-compatible drop-in alternatives.
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