Read/Write
Base Station
U2270B
Features
• Carrier Frequency fosc 100 kHz to 150 kHz
• Typical Data Rate up to 5 Kbaud at 125 kHz
• Suitable for Manchester and Bi-phase Modulation
• Power Supply from the Car Battery or from 5V Regulated Voltage
• Optimized for Car Immobilizer Applications
• Tuning Capability
• Microcontroller-compatible Interface
• Low Power Consumption in Standby Mode
• Power-supply Output for Microcontroller
Applications
• Car Immobilizers
• Animal Identification
• Access Control
• Process Control
1. Description
The U2270B is an IC for IDIC® read/write base stations in contactless identification
and immobilizer systems.
The IC incorporates the energy-transfer circuit to supply the transponder. It consists of
an on-chip power supply, an oscillator, and a coil driver optimized for automotive-specific
distances. It also includes all signal-processing circuits which are necessary to
transform the small input signal into a microcontroller-compatible signal.
Click here to download ATMEL pdf datasheets Read/Write Base Station U2270B
TopDatasheet-IC chip circuits ATMEL Quantum pdf datasheets download
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Tuesday, May 14, 2013
Monday, August 6, 2012
UC2577-ADJ pdf datasheet download Texas Instruments
UC2577-ADJ
Features
· Requires Few External Components
· NPN Output Switches 3.0A, 65V(max)
· Extended Input Voltage Range: 3.0V to 40V
· Current Mode Operation for Improved
Transient Response, Line Regulation, and
Current Limiting
· Soft Start Function Provides Controlled
Startup
· 52kHz Internal Oscillator
· Output Switch Protected by Current Limit,
Undervoltage Lockout and Thermal
Shutdown
· Improved Replacement for LM2577-ADJ
Series
Application
· Simple Boost and Flyback Converters
· SEPIC Topology Permits Input Voltage to
be Higher or Lower than Output Voltage
· Transformer Coupled Forward Regulators
· Multiple Output Designs
Description
The UC2577-ADJ device provides all the active functions necessary
to implement step-up (boost), flyback, and forward converter
switching regulators. Requiring only a few components, these simple
regulators efficiently provide up to 60V as a step-up regulator,
and even higher voltages as a flyback or forward converter regulator.
The UC2577-ADJ features a wide input voltage range of 3.0V to
40V and an adjustable output voltage. An on-chip 3.0A NPN switch
is included with undervoltage lockout, thermal protection circuitry,
and current limiting, as well as soft start mode operation to reduce
current during startup. Other features include a 52kHz fixed frequency
on-chip oscillator with no external components and current
mode control for better line and load regulation.
A standard series of inductors and capacitors are available from
several manufacturers optimized for use with these regulators and
are listed in this data sheet.
Click here to download Texas Instruments UC2577-ADJ pdf datasheet
DatasheetDoc-All pdf datasheet download
Features
· Requires Few External Components
· NPN Output Switches 3.0A, 65V(max)
· Extended Input Voltage Range: 3.0V to 40V
· Current Mode Operation for Improved
Transient Response, Line Regulation, and
Current Limiting
· Soft Start Function Provides Controlled
Startup
· 52kHz Internal Oscillator
· Output Switch Protected by Current Limit,
Undervoltage Lockout and Thermal
Shutdown
· Improved Replacement for LM2577-ADJ
Series
Application
· Simple Boost and Flyback Converters
· SEPIC Topology Permits Input Voltage to
be Higher or Lower than Output Voltage
· Transformer Coupled Forward Regulators
· Multiple Output Designs
Description
The UC2577-ADJ device provides all the active functions necessary
to implement step-up (boost), flyback, and forward converter
switching regulators. Requiring only a few components, these simple
regulators efficiently provide up to 60V as a step-up regulator,
and even higher voltages as a flyback or forward converter regulator.
The UC2577-ADJ features a wide input voltage range of 3.0V to
40V and an adjustable output voltage. An on-chip 3.0A NPN switch
is included with undervoltage lockout, thermal protection circuitry,
and current limiting, as well as soft start mode operation to reduce
current during startup. Other features include a 52kHz fixed frequency
on-chip oscillator with no external components and current
mode control for better line and load regulation.
A standard series of inductors and capacitors are available from
several manufacturers optimized for use with these regulators and
are listed in this data sheet.
Click here to download Texas Instruments UC2577-ADJ pdf datasheet
DatasheetDoc-All pdf datasheet download
uA723 Texas Instruments, pdf datasheet download
uA723
PRECISION VOLTAGE REGULATORS
150-mA Load Current Without External
Power Transistor
Adjustable Current-Limiting Capability
Input Voltages up to 40 V
Output Adjustable From 2 V to 37 V
Direct Replacement for Fairchild mA723C
description
The uA723 is a precision integrated-circuit
voltage regulator, featuring high ripple rejection,
excellent input and load regulation, excellent temperature stability, and low standby current. The circuit consists
of a temperature-compensated reference-voltage amplifier, an error amplifier, a 150-mA output transistor, and
an adjustable-output current limiter.
The uA723 is designed for use in positive or negative power supplies as a series, shunt, switching, or floating
regulator. For output currents exceeding 150 mA, additional pass elements can be connected as shown in
Figures 4 and 5.
The uA723C is characterized for operation from 0°C to 70°C.
Click here to download Texas Instruments uA723 pdf datasheet
DatasheetDoc-All pdf datasheet download
PRECISION VOLTAGE REGULATORS
150-mA Load Current Without External
Power Transistor
Adjustable Current-Limiting Capability
Input Voltages up to 40 V
Output Adjustable From 2 V to 37 V
Direct Replacement for Fairchild mA723C
description
The uA723 is a precision integrated-circuit
voltage regulator, featuring high ripple rejection,
excellent input and load regulation, excellent temperature stability, and low standby current. The circuit consists
of a temperature-compensated reference-voltage amplifier, an error amplifier, a 150-mA output transistor, and
an adjustable-output current limiter.
The uA723 is designed for use in positive or negative power supplies as a series, shunt, switching, or floating
regulator. For output currents exceeding 150 mA, additional pass elements can be connected as shown in
Figures 4 and 5.
The uA723C is characterized for operation from 0°C to 70°C.
Click here to download Texas Instruments uA723 pdf datasheet
DatasheetDoc-All pdf datasheet download
Sunday, August 5, 2012
Texas Instruments μA733 pdf datasheet download
μA733
Features
200-MHz Bandwidth
250-kΩ Input Resistance
Selectable Nominal Amplification of 10,
100, or 400
No Frequency Compensation Required
description/ordering information
The μA733 is a monolithic two-stage video amplifier with differential inputs and differential outputs. Internal
series-shunt feedback provides wide bandwidth, low phase distortion, and excellent gain stability.
Emitter-follower outputs enable the device to drive capacitive loads, and all stages are current-source biased
to obtain high common-mode and supply-voltage rejection ratios.
Fixed differential amplification of 10 V/V, 100 V/V, or 400 V/V may be selected without external components,
or amplification may be adjusted from 10 V/V to 400 V/V by the use of a single external resistor connected
between 1A and 1B. No external frequency-compensating components are required for any gain option.
The device is particularly useful in magnetic-tape or disc-file systems using phase or NRZ encoding and in
high-speed thin-film or plated-wire memories. Other applications include general-purpose video and pulse
amplifiers where wide bandwidth, low phase shift, and excellent gain stability are required.
The μA733C is characterized for operation from 0°C to 70°C; the μA733M is characterized for operation over
the full military temperature range of −55°C to 125°C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Click here to download Texas Instruments μA733 pdf datasheet
DatasheetDoc-All pdf datasheet download
Features
200-MHz Bandwidth
250-kΩ Input Resistance
Selectable Nominal Amplification of 10,
100, or 400
No Frequency Compensation Required
description/ordering information
The μA733 is a monolithic two-stage video amplifier with differential inputs and differential outputs. Internal
series-shunt feedback provides wide bandwidth, low phase distortion, and excellent gain stability.
Emitter-follower outputs enable the device to drive capacitive loads, and all stages are current-source biased
to obtain high common-mode and supply-voltage rejection ratios.
Fixed differential amplification of 10 V/V, 100 V/V, or 400 V/V may be selected without external components,
or amplification may be adjusted from 10 V/V to 400 V/V by the use of a single external resistor connected
between 1A and 1B. No external frequency-compensating components are required for any gain option.
The device is particularly useful in magnetic-tape or disc-file systems using phase or NRZ encoding and in
high-speed thin-film or plated-wire memories. Other applications include general-purpose video and pulse
amplifiers where wide bandwidth, low phase shift, and excellent gain stability are required.
The μA733C is characterized for operation from 0°C to 70°C; the μA733M is characterized for operation over
the full military temperature range of −55°C to 125°C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Click here to download Texas Instruments μA733 pdf datasheet
DatasheetDoc-All pdf datasheet download
Texas Instruments ULN2803A pdf datasheet download
ULN2803A
500-mA Rated Collector Current (Single
Output)
High-Voltage Outputs . . . 50 V
Output Clamp Diodes
Inputs Compatible With Various Types of
Logic
Relay Driver Applications
Compatible with ULN2800A Series
description/ordering information
The ULN2803A is a high-voltage, high-current
Darlington transistor array. The device consists of
eight npn Darlington pairs that feature
high-voltage outputs with common-cathode
clamp diodes for switching inductive loads. The
collector-current rating of each Darlington pair is
500 mA. The Darlington pairs may be connected
in parallel for higher current capability.
Applications include relay drivers, hammer drivers, lamp drivers, display drivers (LED and gas discharge), line
drivers, and logic buffers. The ULN2803A has a 2.7-kΩ series base resistor for each Darlington pair for operation
directly with TTL or 5-V CMOS devices.
absolute maximum ratings at 25°C free-air temperature (unless otherwise noted)†
Collector-emitter voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 V
Input voltage (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 V
Continuous collector current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 mA
Output clamp diode current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 mA
Total substrate-terminal current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −2.5 A
Package thermal impedance, θJA (see Notes 2 and 3): DW package . . . . . . . . . . . . . . . . . . . . . . . 73.14°C/W
N package . . . . . . . . . . . . . . . . . . . . . . . . . 62.66°C/W
Operating virtual junction temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltage values, unless otherwise noted, are with respect to the emitter/substrate terminal GND.
2. Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable
ambient temperature is PD = (TJ(max) − TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.
3. The package thermal impedance is calculated in accordance with JESD 51-7.
Click here to download Texas Instruments ULN2803A pdf datasheet
DatasheetDoc-All pdf datasheet download
500-mA Rated Collector Current (Single
Output)
High-Voltage Outputs . . . 50 V
Output Clamp Diodes
Inputs Compatible With Various Types of
Logic
Relay Driver Applications
Compatible with ULN2800A Series
description/ordering information
The ULN2803A is a high-voltage, high-current
Darlington transistor array. The device consists of
eight npn Darlington pairs that feature
high-voltage outputs with common-cathode
clamp diodes for switching inductive loads. The
collector-current rating of each Darlington pair is
500 mA. The Darlington pairs may be connected
in parallel for higher current capability.
Applications include relay drivers, hammer drivers, lamp drivers, display drivers (LED and gas discharge), line
drivers, and logic buffers. The ULN2803A has a 2.7-kΩ series base resistor for each Darlington pair for operation
directly with TTL or 5-V CMOS devices.
absolute maximum ratings at 25°C free-air temperature (unless otherwise noted)†
Collector-emitter voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 V
Input voltage (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 V
Continuous collector current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 mA
Output clamp diode current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 mA
Total substrate-terminal current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −2.5 A
Package thermal impedance, θJA (see Notes 2 and 3): DW package . . . . . . . . . . . . . . . . . . . . . . . 73.14°C/W
N package . . . . . . . . . . . . . . . . . . . . . . . . . 62.66°C/W
Operating virtual junction temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltage values, unless otherwise noted, are with respect to the emitter/substrate terminal GND.
2. Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable
ambient temperature is PD = (TJ(max) − TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.
3. The package thermal impedance is calculated in accordance with JESD 51-7.
Click here to download Texas Instruments ULN2803A pdf datasheet
DatasheetDoc-All pdf datasheet download
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