Philips

PCF7991AT Datasheet – Advanced Basestation IC – Philips

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Part Number: PCF7991AT

Function: Advanced Basesation IC

Package: Small  (SO14) Type

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

Pinouts:
PCF7991AT Pinouts

Description

The PCF7991 is a highly integrated and powerful advanced basestation IC, ABIC, ideally suited for vehicle immobilisation applications. The device incorporates all necessary functions to facilitate reading and writing of transponders.

The device is intended for use with the Philips transponder family (PCF79xx) as well as other transponder types operating at 125 kHz and employing ASK, Amplitude Shift Keying for write and AM/PM for the read operation. The receiver characteristics (amplifier gain, filter cutoff frequencies) can be optimized to system and transponder requirements. The PCF7991AT IC is designed for easy integration into immobilizer read/write and read-only systems featuring a high degree of integration and very low external component count. The device integrates a powerful antenna driver/modulator, a low-noise adaptive sampling time demodulator, programmable filters/amplifier and digitizer, required to design high-performance basestations. A three wire microcontroller interface is provided for programming the PCF7991AT as well as for the bidirectional communication with the transponder. The three-wire interface can be configured for two wire operation by connecting the data input and the data output.

PCF7991AT Datasheet

 

PCF7991AT Datasheet PDF Download

PCF7991AT pdf

Other data sheets are available within the file: PCF7991AT, PCF7991AT/1081

PCF8574 Datasheet – Remote 8-bit I/O expander – Philips

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Part Number: PCF8574

Function : Remote 8-bit I/O expander for I2C-bus

Package: DIP, SOP 16 Pin, SSOP 20 Pin Type

Manufacturer: Philips Semiconductors

Image

pcf8574-remote-expander
Description

The PCF8574 is a silicon CMOS circuit. It provides general purpose remote I/O expansion for most microcontroller families via the two-line bidirectional bus (I2C). The device consists of an 8-bit quasi-bidirectional port and an I2C-bus interface. The PCF8574 has a low current consumption and includes latched outputs with high current drive capability for directly driving LEDs. It also possesses an interrupt line (INT) which can be connected to the interrupt logic of the microcontroller. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via the I2C-bus. This means that the PCF8574 can remain a simple slave device.

Pinout
pcf8574-datasheet-pinout

 

Features

1. Operating supply voltage 2.5 to 6 V
2. Low standby current consumption of 10 mA maximum
3. I2C to parallel port expander
4. Open-drain interrupt output
5. 8-bit remote I/O port for the I2C-bus
7. Compatible with most microcontrollers
8. Latched outputs with high current drive capability for directly driving LEDs
9. Address by 3 hardware address pins for use of up to 8 devices (up to 16 with PCF8574A)

 

PCF8574 Datasheet

PCF8574 pdf


 

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