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Advanced Basesation-IC. PCF7991AT Datasheet

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Advanced Basesation-IC. PCF7991AT Datasheet






PCF7991AT Basesation-IC. Datasheet pdf. Equivalent




PCF7991AT Basesation-IC. Datasheet pdf. Equivalent





Part

PCF7991AT

Description

Advanced Basesation-IC



Feature


INTEGRATED CIRCUITS DATA SHEET PCF7991A T Advanced Basestation IC Product Spec ification (Rev. 1998 Apr 20) printed 1998 Apr 20 Philips Semiconductors Adv anced Basestation IC CONTENTS 1 2 3 4 5 6 6.1 6.2 7 8 8.1 8.2 8.3 8.4 8.5 8. 5.1 8.5.2 8.5.3 8.5.4 8.5.5 8.5.6 8.6 8 .7 8.8 8.8.1 9 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 10 11 12 13 14 15 FEATURES GEN ERAL DESCRIPTION ORD.
Manufacture

Philips

Datasheet
Download PCF7991AT Datasheet


Philips PCF7991AT

PCF7991AT; ERING INFORMATION BLOCK DIAGRAM QUICK RE FERENCE DATA PINNING INFORMATION Pinnin g Diagram Pin Description MINIMUM APPLI CATION CIRCUITRY FUNCTIONAL DESCRIPTION Power Supply Antenna driver Modulator Oscillator Receiver Synchron Demodulato r Bandpass Filter, Amplifier and Digiti zer Phase Measurement Determining the S ampling Time Data Amplitude Comparison System Diagnostics.


Philips PCF7991AT

Power-on reset Power-down modes Serial Interface Serial Interface Mode COMMAND SET READ_TAG WRITE_TAG_N WRITE_TAG REA D_PHASE SET_SAMPLING_TIME GET_SAMPLING_ TIME SET_CONFIG_PAGE GET_CONFIG_PAGE LI MITING VALUES DC CHARACTERISTICS AC CHA RACTERISTICS PACKAGE DEFINITIONS LIFE S UPPORT APPLICATIONS Product Specifica tion (Rev. 1998 Apr 20) PCF7991AT prin ted 1998 Apr 20 2 .


Philips PCF7991AT

Philips Semiconductors Advanced Basestat ion IC Product Specification (Rev. 19 98 Apr 20) PCF7991AT 1 FEATURES • Fu lly integrated single chip basestation • Compatible with PCF79xx transponder family • Robust antenna coil power d river stage with modulator • High per formance adaptive sampling time AM/PM d emodulator (patent pending) • Read an d write function • Programmabl.

Part

PCF7991AT

Description

Advanced Basesation-IC



Feature


INTEGRATED CIRCUITS DATA SHEET PCF7991A T Advanced Basestation IC Product Spec ification (Rev. 1998 Apr 20) printed 1998 Apr 20 Philips Semiconductors Adv anced Basestation IC CONTENTS 1 2 3 4 5 6 6.1 6.2 7 8 8.1 8.2 8.3 8.4 8.5 8. 5.1 8.5.2 8.5.3 8.5.4 8.5.5 8.5.6 8.6 8 .7 8.8 8.8.1 9 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 10 11 12 13 14 15 FEATURES GEN ERAL DESCRIPTION ORD.
Manufacture

Philips

Datasheet
Download PCF7991AT Datasheet




 PCF7991AT
INTEGRATED CIRCUITS
DATA SHEET
PCF7991AT
Advanced Basestation IC
Product Specification (Rev. 1998 Apr 20)
printed 1998 Apr 20




 PCF7991AT
Philips Semiconductors
Advanced Basestation IC
CONTENTS
1
2
3
4
5
6
6.1
6.2
7
8
8.1
8.2
8.3
8.4
8.5
8.5.1
8.5.2
8.5.3
8.5.4
8.5.5
8.5.6
8.6
8.7
8.8
8.8.1
9
9.1
9.2
9.3
9.4
9.5
9.6
9.7
9.8
10
11
12
13
14
15
FEATURES
GENERAL DESCRIPTION
ORDERING INFORMATION
BLOCK DIAGRAM
QUICK REFERENCE DATA
PINNING INFORMATION
Pinning Diagram
Pin Description
MINIMUM APPLICATION CIRCUITRY
FUNCTIONAL DESCRIPTION
Power Supply
Antenna driver
Modulator
Oscillator
Receiver
Synchron Demodulator
Bandpass Filter, Amplifier and Digitizer
Phase Measurement
Determining the Sampling Time
Data Amplitude Comparison
System Diagnostics
Power-on reset
Power-down modes
Serial Interface
Serial Interface Mode
COMMAND SET
READ_TAG
WRITE_TAG_N
WRITE_TAG
READ_PHASE
SET_SAMPLING_TIME
GET_SAMPLING_TIME
SET_CONFIG_PAGE
GET_CONFIG_PAGE
LIMITING VALUES
DC CHARACTERISTICS
AC CHARACTERISTICS
PACKAGE
DEFINITIONS
LIFE SUPPORT APPLICATIONS
Product Specification (Rev. 1998 Apr 20)
PCF7991AT
printed 1998 Apr 20
2




 PCF7991AT
Philips Semiconductors
Advanced Basestation IC
Product Specification (Rev. 1998 Apr 20)
PCF7991AT
1 FEATURES
Fully integrated single chip basestation
Compatible with PCF79xx transponder family
Robust antenna coil power driver stage with modulator
High performance adaptive sampling time AM/PM
demodulator (patent pending)
Read and write function
Programmable modulator/demodulator characteristics
On-chip clock oscillator and divider in the case of
external clock reference
Antenna rupture and short circuit detection
Low power consumption
Very low power stand-by mode
Low external component count
Small package (SO14).
2 GENERAL DESCRIPTION
The PCF7991AT is a fully integrated Advanced
Basestation IC, ABIC, designed for car immobilizer
systems providing read and write access to an
identification transponder. 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.
The device employs a unique Adaptive Sampling Time
(AST) demodulation technique, that extends the system
operation range and eliminates the effect of a zero
amplitude modulation response from the transponder, as a
result of resonance frequency tolerances.
3 ORDERING INFORMATION
EXTENDED
TYPE NUMBER
PCF7991AT/1081
PACKAGE
NAME
DESCRIPTION
SO14 plastic small outline package; 14 leads
VERSION
SOT108-1
TEMPERATURE
RANGE (°C)
40 to +85
printed 1998 Apr 20
3



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