1996 Nov 20

3

Philips Semiconductors

Product specification

Telecom microcontrollers

PCF84C21A; PCF84C41A;

PCF84C81A

1

FEATURES

• Manufactured in silicon gate CMOS process

• 8-bit CPU, ROM, RAM, I/O in a 28-lead package

• 2 kbyte ROM, 64 byte RAM (PCF84C21A)

• 4 kbyte ROM, 128 byte RAM (PCF84C41A)

• 8 kbyte ROM, 256 byte RAM (PCF84C81A)

• Over 100 instructions (based on MAB8048) all of

1 or 2 cycles

• 20 quasi-bidirectional I/O Port lines

• High sink current capability on the 8 lines of Port 1

• 8-bit programmable timer/event counter 1

• 3 single-level vectored interrupts:

– external

– 8-bit programmable timer/event counter 1

• Two test inputs, one of which also serves as the external

interrupt input

• Stop and Idle modes

• Supply voltage: 2.5 to 5.5 V

• Clock frequency: 1 to 16 MHz

• Operating temperature: −40 to +85 °C.

2

GENERAL DESCRIPTION

This data sheet details the specific properties of the

PCF84C21A, PCF84C41A and PCF84C81A. The shared

properties of the PCF84CxxxA family of microcontrollers

are described in the

“PCF84CxxxA family” data sheet

which should be read in conjunction with this publication.

The PCF84C21A, PCF84C41A and PCF84C81A are

general purpose CMOS microcontrollers with 2 kbytes,

4 kbytes and 8 kbytes of program memory and 64,128 and

256 bytes of RAM, respectively. In addition to 20 I/O port

interface. This two-line serial bus extends the

microcontroller capabilities when implemented with the

I/O expanders, telecom circuits, ADC and DAC converters,

clock/calendar circuits, EEPROM and RAM and are listed

in

The instruction set is based on that of the MAB8048 and

is a sub-set of that listed in the

“PCF84CxxxA family” data

sheet.

3

ORDERING INFORMATION (see note 1)

Note

1. Please refer to the Order Entry Form (OEF) for these devices for the full type number to use when ordering. This type

number will also specify the required program and the ROM mask options.

TYPE NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

PCF84C21AP

DIP28

plastic dual in-line package; 28 leads (600 mil)

SOT117-1

PCF84C41AP

PCF84C81AP

PCF84C21AT

SO28

plastic small outline package; 28 leads; body width 7.5 mm

SOT136-1

PCF84C41AT

PCF84C81AT