NXP Semiconductors PCF85116-3T/01,118

Overview

PCF85116-3T/01,118 from NXP Semiconductors (formerly Philips) is a 16 kbit (2048 × 8-bit) I²C-bus EEPROM with on-chip voltage multiplier, 2.7–5.5 V single-supply operation, and hardware write-protection via active-HIGH WP pin. It delivers 100 kcycles endurance at 22 °C, 20-year data retention at 55 °C, and supports standard- (100 kHz) and fast-mode (400 kHz) I²C communication in industrial temperature range (−40 to +85 °C). It is used for configuration storage in embedded controllers, power supply supervisors, and sensor calibration modules.

For engineers reviewing the PCF85116-3T/01,118 datasheet, PCF85116-3T/01,118 pinout, PCF85116-3T/01,118 application, or PCF85116-3T/01,118 equivalent, key selection criteria include its 8-pin SO package (SOT96-1), 32-byte page write capability, internal E/W timing (no external components), fault-tolerant redundant cell architecture, and compatibility with PCx85xxC-2 family addressing schemes.

Technical Context

The PCF85116-3T/01,118 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 blocks. Its internal oscillator and sequencer manage all write cycles autonomously, with maximum 10 ms E/W time and no host timing dependency.

It uses floating-gate CMOS technology with redundant EEPROM cells for single-bit error tolerance and multi-bit coverage in most cases. The WP pin disables write commands at hardware level: when HIGH, the device ignores incoming data bytes and returns no ACK, though it still acknowledges slave address and word address.

Key Specifications

Pinout & Package

PCF85116-3T/01,118 is supplied in an 8-lead plastic small outline package (SO8, SOT96-1), 3.9 mm body width, with gull-wing leads and surface-mount footprint. Pins 1–3 are not connected (n.c.) per design; functional terminals occupy pins 4–8 only.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT24C16C-SSHM-T and M95160-WMN6TP, the PCF85116-3T/01,118 offers deterministic hardware write disable, guaranteed I²C timing compliance at 400 kHz, and proven fault-tolerant cell architecture - making it optimal for safety-critical or high-reliability industrial storage where write integrity is enforced at the physical layer.

Availability

PCF85116-3T/01,118 is available at Aetrix Electronics and suitable for industrial sensor calibration, power supply configuration, embedded bootloader settings, and consumer appliance user preferences requiring stable component supply across long-lifecycle programs.

Supply support for PCF85116-3T/01,118 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, designs high-reliability interface and memory ICs for industrial, automotive, and IoT applications with emphasis on long-term supply stability and automotive-grade qualification.

The PCF85116-3T/01,118 belongs to NXP's legacy I²C EEPROM product line, engineered specifically for robust configuration storage in harsh environments where data integrity, low power, and hardware-level write protection are mandatory.

FAQ

What is the maximum I²C clock frequency supported by the PCF85116-3T/01,118?

The PCF85116-3T/01,118 supports I²C standard-mode up to 100 kHz and fast-mode up to 400 kHz. It does not support high-speed mode (3.2 MHz). Timing compliance is verified per I²C-bus specification Table 8, with tLOW and tHIGH minima of 1.3 µs in fast mode. This ensures reliable operation with common microcontroller I²C peripherals without external bus buffering.

How does the write-protection (WP) pin function on the PCF85116-3T/01,118?

On the PCF85116-3T/01,118, the WP pin is active-HIGH: when driven HIGH, it disables all write operations - the device will not acknowledge data bytes and will not modify EEPROM contents. However, it still acknowledges the slave address and word address. This allows safe read access while preventing accidental writes during power-up or system resets.

Is the PCF85116-3T/01,118 pin-compatible with other members of the PCx85xxC-2 family?

Yes, the PCF85116-3T/01,118 is explicitly stated as pin and address compatible with the PCx85xxC-2 family. Pins 1–3 are n.c., matching the pinout of those devices, and the I²C slave address format (1010 B3 B2 B1 R/W) is identical. No PCB layout changes are required when migrating from PCx85xxC-2 parts to the PCF85116-3T/01,118.

What is the endurance rating of the PCF85116-3T/01,118 under industrial temperature conditions?

The PCF85116-3T/01,118 guarantees 100,000 erase/write cycles at ambient temperatures from −40 to +85 °C. At 22 °C, endurance is rated at 1,000,000 cycles. This dual-tier specification reflects real-world degradation mechanisms and ensures predictable lifetime in both extended-temperature industrial deployments and controlled lab environments.

Does the PCF85116-3T/01,118 require external components for write operations?

No. The PCF85116-3T/01,118 integrates an on-chip voltage multiplier and internal write timing sequencer. Once a STOP condition is issued after data transmission, the device autonomously executes the entire 10 ms write cycle with no external timing components, clocks, or high-voltage supplies required - simplifying BOM and reducing PCB area.