pcf1252 NXP Semiconductors, pcf1252 Datasheet - Page 2

• Manufacturer Part Number: pcf1252
• Description: Threshold Detector And Reset Generato
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FEATURES
ORDERING INFORMATION
Note
1. X = 0 to 9; depending on threshold voltage.
BLOCK DIAGRAM
1998 Apr 16
PCF1252-XP
PCF1252-XT
TYPE NUMBER
Very low current consumption, typically 10 A
10 factory programmed threshold voltages available
covering trip voltages from 4.75 to 2.55 V
Variable RESET delay
RESET pulse polarity selection
Defined outputs at 0.6 V (typ.)
Comparator for second level detection
(e.g. overvoltage detection)
Advance warning of power fail
Operating temperature range 40 to +85 C.
Threshold detector and reset generator
50 mV trip point accuracy over full temperature range
handbook, full pagewidth
(1)
(1)
NAME
DIP8
SO8
V DD
V SS
8
4
plastic dual in-line package; 8 leads (300 mil)
plastic small outline package; 8 leads; body width 3.9 mm
COMIN
3
comparator 1
comparator 2
1.30 V
Fig.1 Block diagram.
DELAY
CT
2
1
GENERAL DESCRIPTION
The PCF1252-Xs are low-power CMOS voltage threshold
detectors designed especially for supervision of
microcontroller/microprocessor systems for detection of
power-on/off conditions and generation of a system reset
pulse. The PCF1252-X also provides a POWF (power fail)
output which is activated at a precise factory-programmed
trip point. A system RESET output has a built-in delay with
duration determined by an external capacitor (C
A second comparator (comparator 2) has been included to
enable the possibility of a second monitoring point in the
system.
PACKAGE
PCF1252-X
DESCRIPTION
SELECT
2
MGC915
PCF1252-X family
5
7
6
COMOUT
RESET
POWF
Product specification
VERSION
SOT97-1
SOT96-1
CT
).