PCF5001T データシートの表示（PDF） - Philips Electronics
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PCF5001T Datasheet PDF : 44 Pages
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Philips Semiconductors
POCSAG Paging Decoder
Product specification
PCF5001
SYMBOL
RE
AL
OM
VSS
TT
IE
SK
SR
ON
AI
PIN
PCF5001T PCF5001H
(SOT136-1) (SOT358-1)
DESCRIPTION
14
28
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.
15
29
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.
16
30
Vibrator output. This output can directly drive an external bipolar transistor
to control a vibrator type alerter.
17
31
Main negative supply voltage.
18
32
Test mode enable input. Always LOW by operation of an on-chip
pull-down.
19
1
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.
20
3
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.
21
4
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.
22
5
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.
23
6
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.
1997 Mar 04
7
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