PCF1252-X Datasheet – Threshold Detector and Reset Generator

Part Number : PCF1252-X

Function : Threshold detector and reset generator

Package : DIP 8, SO 8 Pin type

Manufacturers : Philips Electronics ( https://www.nxp.com/ )

Pinouts :

PCF1252-X datasheet

 

Description :

The PCF1252-X 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 aPOWF (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 (CCT).
A second comparator (comparator 2) has been included to enable the possibility of a second monitoring point in the system.

Features :

1. Very low current consumption, typically 10 µA
2. 10 factory programmed threshold voltages available covering trip voltages from 4.75 to 2.55 V
3. ±50 mV trip point accuracy over full temperature range
4. Variable RESET delay
5. RESET pulse polarity selection
6. Defined outputs at 0.6 V (typ.)
7. Comparator for second level detection (e.g. overvoltage detection)
8. Advance warning of power fail

 

PCF1252-X Datasheet PDF Download


PCF1252-X pdf

Other data sheets within the file :

PCF1252, PCF1252X, PCF1252-XP, PCF1252-XT

74HC161 Datasheet – Synchronous 4-bit Binary Counter ( PDF )

Part Number : 74HC161

Function : Presettable synchronous 4-bit binary counter, asynchronous reset

Package : DIP, SOP 16 Pin Type

Manufacturers : Philips Electronics ( https://www.nxp.com/ )

Pinouts :

74HC161 datasheet

 

Description :

The 74HC161 / 74HCT161 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A.

The devices are synchronous presettable binary counters which feature an internal look-ahead carry and can be used for high-speed counting. Synchronous operation is provided by having all flip-flops clocked simultaneously on the positive-going edge of the clock (CP).

Features :

1. Synchronous counting and loading

2. Two count enable inputs for n-bit cascading

3. Positive-edge triggered clock

4. Asynchronous reset

5. Output capability : standard

6. ICC category : MSI

Other data sheets within the file :

74161, 74HC161D, 74HC161DB, 74HC161NB

 

74HC161 Datasheet PDF Download


74HC161 pdf