Philips Semiconductors

Preliminary specification

83C749/87C749

80C51 8-bit microcontroller family

2K/64 OTP/ROM, 5 channel 8-bit A/D, PWM, low pin count

2

1998 Apr 23

DESCRIPTION

The Philips 83C749/87C749 offers many of the advantages of the

80C51 architecture in a small package and at low cost.

The 8XC749 Microcontroller is fabricated with Philips high-density

CMOS technology. Philips epitaxial substrate minimizes CMOS

latch-up sensitivity.

The 8XC749 contains a 2k

× 8 ROM (83C749) EPROM (87C749), a

64

× 8 RAM, 21 I/O lines, a 16-bit auto-reload counter/timer, a

fixed-priority level interrupt structure, an on-chip oscillator, a five

channel multiplexed 8-bit A/D converter, and an 8-bit PWM output.

The EPROM version of this device, the 87C749, is available in

plastic one-time programmable (OTP) packages. Once the array

has been programmed, it is functionally equivalent to the masked

ROM 83C749. Thus, unless explicitly stated otherwise, all

references made to the 83C749 apply equally to the 87C749.

The 83C749 supports two power reduction modes of operation

referred to as the idle mode and the power-down mode.

FEATURES

packages

– 28-pin DIP

– 28-pin Shrink Small Outline Package (SSOP)

– 28-pin PLCC

– Normal operation: less than 11mA @ 5V, 12MHz

– Idle mode

– Power-down mode

EPROM (87C749)

applications

PART NUMBER SELECTION

ROM

TEMPERATURE RANGE

°C

AND PACKAGE

FREQUENCY

DRAWING

NUMBER

P83C749EBP N

P87C749EBP N

OTP

0 to +70, 28-pin Plastic Dual In-line Package

3.5 to 16MHz

SOT117-2

P83C749EBA A

P87C749EBA A

OTP

0 to +70, 28-pin Plastic Leaded Chip Carrier

3.5 to 16MHz

SOT261-3

P83C749EBD DB

P87C749EBD DB

OTP

0 to +70, 28-pin Shrink Small Outline Package

3.5 to 16MHz

SOT341-1

NOTE:

1. OTP = One Time Programmable EPROM.