1FEATURES
• RF section
– Single-Chip 2.4-GHz RF Transceiver and
MCU
– Data Rates and Modulation Formats:
– 2-Mbps GFSK, 320-kHz Deviation
– 2-Mbps GFSK, 500-kHz Deviation
– 1-Mbps GFSK, 160-kHz Deviation
– 1-Mbps GFSK, 250-kHz Deviation
– 500-kbps MSK
– 250-kbps GFSK, 160-kHz Deviation
– 250-kbps MSK
– Excellent Link Budget, Enabling Long
Range Without External Front-Ends
– Programmable Output Power up to 4 dBm
– Excellent Receiver Sensitivity (–88 dBm at
2 Mbps)
– Suitable for Systems Targeting Compliance
With Worldwide Radio Frequency
Regulations: ETSI EN 300 328 and EN 300
440 Category 2 (Europe), FCC CFR47 Part
15 (US), and ARIB STD-T66 (Japan)
– Accurate RSSI Function
• Layout
– Few External Components
– Reference Designs Available
– 32-pin 5-mm × 5-mm QFN (8 General I/O
Pins) Package
• Low Power
– Active Mode RX: 22.5 mA
– Active Mode TX (0 dBm): 27 mA
– Power Mode 1 (4-μs Wake-Up): 1 mA
– Wide Supply-Voltage Range
– 3.3V LDO Output
– Supply Range: 2 V–3.6 V
– USB 5-V Regulator: 4 V–5.45 V
• Microcontroller
– High-Performance and Low-Power 8051
Microcontroller Core With Code Prefetch
– 32-KB Flash Program Memory
– 2 KB SRAM
– Hardware Debug Support
– Extensive Baseband Automation, Including
Auto-Acknowledgement and Address
Decoding
• Peripherals
– Full Speed USB 2.0
– 6 Endpoints (Endpoint 0 and 5 IN/OUT
Endpoints)
– Internal Pullup for D+
– 5-V to 3.3-V Regulator
– Powerful Two-Channel DMA
– General-Purpose Timers (One 16-Bit, Two
8-Bit)
– Radio Timer, 40-Bit
– IR Generation Circuitry
– Several Oscillators:
– 32-MHz XOSC
– 16-MHz RCOSC
– 32-kHz RCOSC
– 32-kHz Sleep Timer With Capture
– AES Security Coprocessor
– UART/SPI Serial Interface
– 8 General-Purpose I/O pins (6 × 4-mA and 2
× 20-mA Drive Strength)
– Watchdog Timer
– True Random-Number Generator

APPLICATIONS
• Proprietary 2.4-GHz Systems
• Human Interface Devices (USB Dongle)
• Consumer Electronics

DESCRIPTION
The CC2544 is an optimized system-on-chip (SoC) solution for USB applications with datarates upto 2Mbps built
with low bill-of-material cost. The CC2544 combines the excellent performance of a leading RF transceiver with a
single-cycle 8051 compliant CPU, 32-KB in-system programmable flash memory, up to 2-KB RAM, and many
other powerful features.
The CC2544 is compatible with the CC2541/CC2543/CC2545. It comes in a 5-mm × 5-mm QFN32 package, with
SPI/UART/USB interface. The CC2544 comes complete with reference designs from Texas Instruments.
The devices target wireless consumer and HID applications. The CC2544 is ideal for USB dongle applications.