Philips Semiconductors

Preliminary specification

OM5234/OM5284

CMOS single-chip 8-bit microcontrollers

2

1996 Nov 01

DESCRIPTION

The OM5234 and OM5284 single-chip 8-bit microcontrollers are

manufactured in an advanced CMOS process and are derivatives of

the 80C51 microcontroller family. The OM5234 and OM5284 are

pre-programmed devices for specific applications. Unless

specifically stated otherwise, all references to OM5234 apply equally

to OM5284.

The OM5234 contains a non-volatile 16k

× 8 read-only program

memory, a volatile 256

× 8 read/write data memory, four 8-bit I/O

ports, two 16-bit timer/event counters (identical to the timers of the

80C51), a multi-source, two-priority-level, nested interrupt structure,

UART and on-chip oscillator and timing circuits.

FEATURES

– Idle mode

– Power-down mode

ORDERING INFORMATION

OM5234

F T P

Device

OM5234

ROM code for application

5XX, etc.

Frequency Range

F = 3.5 to 16MHz

I = 3.5 to 24MHz

Package designator

A = Plastic Leaded Chip Carrier

B = Plastic Quad Flat Package

P = Plastic Dual In-Line Package

OM5284 X Y ZZ

Device

OM5284

ROM code for application

01, 02, 03

Frequency Range

E = 3.5 to 16MHz

I = 3.5 to 24MHz

Package designator

A = Plastic Leaded Chip Carier

B = Plastic Quad Flat Package

P = Plastic Dual In-Line Package

/ YYY

Temperature Range

B = 0 to 70

°C

/

PART NUMBER

TEMPERATURE RANGE

°C

AND PACKAGE

FREQUENCY

(MHz)

DRAWING

NUMBER

OM5234/FBB/YYY

0 to 70

°C, Plastic Quad Flat Package

16

SOT307-2

OM5234/FBP/YYY

0 to 70

°C, Plastic Dual In-Line Package

16

SOT129-1

OM5234/FBA/YYY

0 to 70

°C, Plastic Leaded Chip Carrier

16

SOT187-2

OM5284EBYY

0 to 70

°C, Plastic Quad Flat Package

16

SOT307-2

OM5284EAYY

0 to 70

°C, Plastic Leaded Chip Carrier

16

SOT187-2

OM5284EPYY

0 to 70

°C, Plastic Dual In-Line Package

16

SOT129-1

LOGIC SYMBOL

ADDRESS AND

DATA BUS

ADDRESS BUS

RST

XTAL1

XTAL2

EA

ALE

PSEN

RxD

TxD

INT0

INT1

T0

T1

WR

RD

SU00800