PCF5001 datasheet(7/44 Pages) PHILIPS

7 / 44 page

1997 Mar 04

Philips Semiconductors

Product speciﬁcation

POCSAG Paging Decoder

PCF5001

Receiver enable output. May be used to control the paging receiver power

control input, to minimize power consumption. The decoder provides a

HIGH-level at this pin, when receiver operation is requested. Each time

the decoder does not require any input data at DI the receiver enable

output is LOW.

Alert LOW-level output. Open drain alert output in anti-phase to AH, to

provide LOW-level alerting. HIGH-level alerting is generated in conjunction

with AH.

Vibrator output. This output can directly drive an external bipolar transistor

to control a vibrator type alerter.

VSS

Main negative supply voltage.

Test mode enable input. Always LOW by operation of an on-chip

pull-down.

Interface enable input. While the interface enable input is active HIGH,

operation of the ON, SK, SR, AI, BL and OR inputs and outputs is

possible. When IE is LOW the inputs do not respond to applied signals

and the outputs are made high-impedance. In alert-only pager mode the

interface enable input does not have any effect on the operation of inputs

ON, SK and SR, but IE must be referenced to LOW or HIGH.

SILENT state control input. The SILENT control input selects the decoder

ON status (LOW-level) or SILENT status (HIGH-level), if the ON input is

active HIGH. An on-chip pull-up is provided, if the decoder has been

programmed for ‘alert-only pager’ mode, whereby the pull-up is disabled

for display pager mode. In ‘display pager’ mode status change is

possible if the interface enable input (IE) is HIGH and the status is latched

on the falling edge of IE.

Status request and reset input. A HIGH-going pulse on this input causes

(a) status indication cadence to be generated, if the decoder is not alerting

or (b) resetting of a call alert, repeated call alert or battery-low alert, if

active or (c) triggers the call store re-alert facility, if repeat mode is active.

In ‘display pager’ mode operation of SR is possible only if the interface

control input is active. Normally LOW by the operation of an on-chip

pull-down.

On/off control input. The on/off control input selects the decoder ON status

(HIGH-level) or OFF status (LOW-level). An on-chip pull-up resistor is

provided, if the decoder has been programmed for ‘alert-only pager’ mode,

but the pull-up resistor is disabled for ‘display pager’ mode. In

‘display pager’ mode, status change is possible if the interface enable

input (IE) is HIGH and the status is latched on the falling edge of IE.

Alarm input. A HIGH-level on this input causes generation of a continuous

HIGH-level alert via AH and AL outputs, if the decoder operates in ON

status or OFF status. In addition, the LED output is active independent

from the decoder status, but in accordance with AI. Pulsing the input may

be used to modulate the alert and LED indication. Normally LOW in

‘alert-only pager’ mode by operation of an on-chip pull-down.

SYMBOL

DESCRIPTION

PCF5001T

(SOT136-1)

PCF5001H

(SOT358-1)

PCF5001 Datasheet(PDF) 7 Page - NXP Semiconductors

PCF5001 Datasheet(HTML) 7 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44

Datasheet Download

Link URL