NXP Semiconductors PCF85116-3P/01,112

Overview

PCF85116-3P/01,112 from NXP Semiconductors (formerly Philips) is a 16 kbit (2048 × 8-bit) I²C-compatible CMOS EEPROM with on-chip voltage multiplier, write-protection input (WP), and fault-tolerant redundant cell architecture. It operates from 2.7 V to 5.5 V, supports 100 kHz standard-mode and 400 kHz fast-mode I²C communication, and delivers ≤1.0 mA read/write current. It is used in industrial control modules for storing calibration data, configuration parameters, and firmware patch metadata.

For engineers reviewing the PCF85116-3P/01,112 datasheet, PCF85116-3P/01,112 pinout, PCF85116-3P/01,112 application, or PCF85116-3P/01,112 equivalent, key selection considerations include its 32-byte page write capability, 10 ms max write cycle time, hardware write-protection via pin 7, and compatibility with legacy PCx85xxC-2 family systems requiring no address pins.

Technical Context

The PCF85116-3P/01,112 implements an I²C slave interface with fixed 4-bit device identifier '1010', three block-select bits (B3–B1), and R/W bit - enabling access to eight 256-byte memory blocks. Its internal oscillator and sequencer manage all timing for erase/write cycles, eliminating external components.

It uses floating-gate EEPROM cells with redundancy to tolerate single-bit errors and cover many multi-bit failures. The WP pin (active HIGH) disables write acknowledgment when asserted, while power-on reset ensures deterministic bus logic initialization within ≤10 µs.

Key Specifications

Pinout & Package

PCF85116-3P/01,112 is supplied in an 8-lead plastic dual in-line package (DIP8, SOT97-1), 300 mil width, with 2.54 mm lead pitch. Pins 1–3 are not connected (n.c.).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar EEPROM applications.

Compared with AT24C128-10PU-2.7 and M95128-DRMN6TP/K, the PCF85116-3P/01,112 offers guaranteed hardware write protection, I²C pin compatibility with legacy Philips designs, and optimized 16 kbit density for compact configuration storage - making it preferable for retrofitting or maintaining established industrial control platforms.

Availability

PCF85116-3P/01,112 is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and telecom line card ID storage requiring stable component supply and long-term lifecycle support.

Supply support for PCF85116-3P/01,112 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors, formerly Philips Semiconductors, is a global leader in high-reliability analog and mixed-signal ICs for industrial, automotive, and communications markets.

The PCF85116-3P/01,112 belongs to NXP's legacy I²C EEPROM product line, designed specifically for robust, low-power, pin-compatible replacement of aging PCx85xxC-2 family devices in mission-critical embedded systems.

FAQ

What is the maximum I²C clock frequency supported by the PCF85116-3P/01,112?

The PCF85116-3P/01,112 supports I²C fast-mode operation up to 400 kHz and standard-mode up to 100 kHz. It does not support high-speed mode (3.2 MHz). Timing compliance is verified per Table 8 in the datasheet, with tLOW and tHIGH minimums of 1.3 µs and 0.6 µs respectively in fast mode. The PCF85116-3P/01,112 requires no external timing components due to its internal oscillator and sequencer.

How does the write-protection (WP) pin function on the PCF85116-3P/01,112?

Pin 7 (WP) is an active HIGH input that disables write operations when driven HIGH. When WP = HIGH, the PCF85116-3P/01,112 acknowledges the slave address and word address but refuses to acknowledge subsequent data bytes - preventing EEPROM content modification. This behavior is hardware-enforced and remains active across power cycles, making it ideal for protecting calibration data in field-deployed equipment.

Is the PCF85116-3P/01,112 pin-compatible with other members of the PCx85xxC-2 family?

Yes, the PCF85116-3P/01,112 is explicitly stated as pin and address compatible with the PCx85xxC-2 family. Pins 1–3 are n.c., matching the footprint of earlier variants, and the I²C address format (1010 B3 B2 B1 R/W) is identical. This allows direct substitution in existing designs without PCB or firmware changes - provided the 16 kbit capacity meets system requirements.

What is the endurance rating and data retention specification for the PCF85116-3P/01,112?

The PCF85116-3P/01,112 guarantees 1,000,000 erase/write cycles at 22 °C and 100,000 cycles over the full operating range (−40 °C to +85 °C). Data retention is rated at ≥20 years at 55 °C ambient, validated under JEDEC JESD22-A117 conditions. These specifications are measured per byte and apply across the entire 2048-byte address space of the PCF85116-3P/01,112.

Does the PCF85116-3P/01,112 require an external high-voltage supply for programming?

No. The PCF85116-3P/01,112 integrates an on-chip voltage multiplier that generates the required programming voltage from the standard 2.7–5.5 V VDD supply. This eliminates the need for external charge pumps, high-voltage regulators, or special programming hardware - enabling in-system writes using only the I²C bus and main power rail.