ATA5771_09 Datasheet, PDF (1/287 Pages) ATMEL Corporation – Microcontroller with UHF ASK/FSK Transmitter

General Features
• Complete Key Fob IC Consisting of an AVR^® Microcontroller and RF Transmitter PLL in
a Single QFN24 5 mm × 5 mm Package (Pitch 0.65 mm)
– f₀ = 310 MHz to 350 MHz (ATA5773)
– f₀ = 429 MHz to 439 MHz (ATA5774)
– f₀ = 868 MHz to 928 MHz (ATA5771)
• Automotive Qualified
• Temperature Range –40° C to +85° C
• ESD Protection: HBM 2500V, MM 100V, CDM 1000V
• Supply voltage 2.0V to 4.0V for Single Li-cell Power Supply
• Low Power Consumption
– Active Mode: Typical 9.8 mA at 3.0V and 4 MHz Microcontroller-clock
– Power-down Mode: Typical 200 nA at 3.0V
• Modulation Scheme ASK/FSK
• Integrated PLL Loop Filter
• High Output Power (8 dBm at 315 MHz/7.5 dBm at 433 MHz/ 5.5 dBm at 868 MHz)
• High Performance, Low Power AVR 8-bit Microcontroller
• Advanced RISC Architecture
• Non-volatile Program and Data Memories
– 4 KByte of In-system Programmable Program Memory Flash
– 256 Bytes In-system Programmable EEPROM
– 256 Bytes Internal SRAM
• Peripheral Features
– Two Timer/Counter, 8- and 16-bit Counters with Two PWM Channels on Both
– 10-bit ADC
– Programmable Watchdog Timer with Separate On-chip Oscillator
– Universal Serial Interface (USI)
• Special Microcontroller Features
– debugWIRE On-chip Debug System
– In-system Programmable via SPI Port
– External and Internal Interrupt Sources
– Pin Change Interrupt on 12 Pins
– Enhanced Power-on Reset Circuit
– Programmable Brown-out Detection Circuit
– Internal Calibrated Oscillator
– On-chip Temperature Sensor
• 12 Programmable I/O Lines
Microcontroller
with
UHF ASK/FSK
Transmitter
ATA5771
ATA5773
ATA5774
1. General Description
The ATA5771/ATA5773/ATA5774 is a single key fob IC containing the AVR microcon-
troller ATtiny44V and the UHF PLL transmitters T5750/53/54 build-up using a stacked
die technique supplied in a QFN24 5 mm × 5 mm package. These devices have been
specially developed for the demands of RF low-cost data transmission systems with
data rates of up to 32 kBit/s. Its main applications are in the areas of Remote Key-
less-Entry (RKE), Passive Entry Go (PEG), and Remote Start. It can be used in the
frequency range of f₀ = 310 MHz to 350 MHz, f₀ = 429 MHz to 439 MHz or
f₀ = 868 MHz to 928 MHz for ASK or FSK data transmission.
9137B–RKE–02/09