PCF85116 datasheet(3/20 Pages) PHILIPS

3 / 20 page

1997 Apr 02

Philips Semiconductors

Product speciﬁcation

2048

× 8-bit CMOS EEPROM with I2C-bus

interface

PCF85116-3

FEATURES

• Low power CMOS:

– maximum operating current 1.0 mA

– maximum standby current 10

µA (at 5.5 V),

typical 4

µA

• Non-volatile storage of 16 kbits organized as eight

blocks of 256

× 8-bit each

• Single supply with full operation down to 2.7 V

• On-chip voltage multiplier

• Serial input/output I2C-bus (100 kbits/s standard-mode

and 400 kbits/s fast-mode)

• Write operations: multi byte write mode up to 32 bytes

• Write-protection input

• Read operations:

– sequential read

– random read

• Internal timer for writing (no external components)

• Power-on-reset

• High reliability by using redundant EEPROM cells

• Endurance: 1000000 Erase/Write (E/W) cycles at

Tamb =22 °C

• 20 years non-volatile data retention time (minimum)

• Pin and address compatible to the PCx85xxC-2 family

(see also Section 2.1)

• 2 kV ESD protection (Human Body model).

DESCRIPTION

The PCF85116-3 is an 16 kbits (2048

× 8-bit) floating gate

Electrically Erasable Programmable Read Only Memory

(EEPROM). By using redundant EEPROM cells it is fault

tolerant to single bit errors. In most cases multi bit errors

are also covered. This feature dramatically increases

reliability compared to conventional EEPROM memories.

Power consumption is low due to the full CMOS

technology used. The programming voltage is generated

on-chip, using a voltage multiplier.

As data bytes are received and transmitted via the serial

I2C-bus, a package using eight pins is sufficient. Only one

PCF85116-3 device is required to support all eight blocks

of 256

× 8-bit each.

Timing of the E/W cycle is carried out internally, thus no

external components are required. A write-protection input

at pin 7 (WP) allows disabling of write-commands from the

master by a hardware signal. When pin 7 is HIGH the data

bytes received will not be acknowledged by the

PCF85116-3 and the EEPROM contents are not changed.

2.1

Remark

The PCF85116-3 is pin and address compatible to the

PCx85xxC-2 family. The PCF85116-3 covers the whole

address space of 16 kbits; address inputs are no longer

needed. Therefore, pins 1 to 3 are not connected.

The write-protection input is at pin 7.

QUICK REFERENCE DATA

SYMBOL

PARAMETER

CONDITIONS

MIN.

MAX.

UNIT

VDD

supply voltage

2.7

5.5

IDDR

supply current read

fSCL = 400 kHz; VDD = 5.5 V

−

1.0

IDDW

supply current E/W

fSCL = 400 kHz; VDD = 5.5 V

−

1.0

Istb

standby supply current

VDD = 2.7 V

−

µA

VDD = 5.5 V

−

µA

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