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PCD5008

FLEX™ Pager Decoder

Philips Electronics 

Philips Semiconductors

FLEX™ Pager Decoder

Product specification

PCD5008

1 FEATURES

• FLEX™ paging protocol signal processor

• 16 programmable user address words

• 16 fixed temporary addresses

• 1600, 3200 and 6400 bits/s decoding

• Any-phase or single-phase decoding

• Uses standard serial peripheral interface (SPI) in slave

mode

• Allows low current power-down mode operation of host

processor

• Highly programmable receiver control

• Real-time clock time base

• FLEX™ fragmentation and group messaging support

• Real-time clock over-the-air update support

• Compatible with synthesized receivers

• Low battery indication (external detector)

• Low cost LQFP32 plastic package

• Operates using a 76.8 kHz crystal

• Very low power consumption

• Operates at low supply voltage.

3 GENERAL DESCRIPTION

This data sheet describes the operation of the PCD5008

integrated paging decoder. It is fully compatible with the

Motorola FLEXchip™ IC.

The PCD5008, also referred to as the decoder, simplifies

implementation of a FLEX™ paging device, by being able

to interface with several off-the-shelf paging receivers and

host microcontrollers/processors. Its primary function is to

process information received and demodulated from a

FLEX™ radio paging channel, select messages addressed

to the paging device and communicate the message

information to the host.

Motorola FLEXstack™ software, installed on the product

host processor, communicates with the PCD5008 and

interprets the codewords that are passed to the host.

The PCD5008 operates the paging receiver in an efficient

power consumption mode and enables the host to operate

in a low-power mode when no message is being received.

2 APPLICATIONS

• Numeric FLEX™ pagers

• Alphanumeric FLEX™ pagers

• Remote metering

• Car security systems

• Personal digital assistants.

4 QUICK REFERENCE DATA

SYMBOL

VDD

IDD

Tamb

fEXTAL

PARAMETER

supply voltage

supply current

operating ambient temperature

external clock frequency

CONDITIONS

see Sections 10 and 12

MIN. TYP. MAX. UNIT

1.8 2.2 3.6 V

−

6.4 −

µA

−25 +25 +70 °C

−

76.8 −

kHz

5 ORDERING INFORMATION

TYPE

NUMBER

PCD5008H

PACKAGE

NAME

DESCRIPTION

LQFP32 plastic low profile quad flat package; 32 leads; body 7 × 7 × 1.4 mm

VERSION

SOT358-1

1998 Jun 17

3

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