The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.
CC2531 offers 256KB RAM option, lower power, improved sensitivity, and up-to-date software support. CC2531 does not provide on board location feature.
TI does not recommend using this part in a new design. This product continues to be in production to support existing customers.
The CC2431 is a true System-On-Chip (SOC) for wireless sensor networking ZigBee®/IEEE 802.15.4 solutions. The chip includes a location detection hardware module that can be used in so-called blind nodes (i.e. nodes with unknown location) to receive signals from nodes with known locations. Based on this the location engine calculates an estimate of a blind nodes position. The CC2431 enables ZigBee® nodes to be built with very low total bill-of-material costs. The CC2431 combines the excellent performance of the leading CC2420 RF transceiver with an industry-standard enhanced 8051 MCU, 128 KB flash memory, 8 KB RAM and many other powerful features. Combined with the industry leading ZigBee® protocol stack (Z-Stack™) from Texas Instruments, the CC2431 provides the markets most competitive ZigBee® solution.
The CC2431 is highly suited for systems where ultra low power consumption is required. This is achieved by various operating modes. Short transition times between these modes further ensure low power consumption.
Location Engine calculates the location of a node in a network
High performance and low power 8051 microcontroller core.
2.4 GHz IEEE 802.15.4 compliant RF transceiver (industry leading CC2420 radio core.
ZigBee® protocol stack (Z-Stack™) from Texas Instruments includes support for CC2431s location engine.
Excellent receiver sensitivity and robustness to interferers
128 KB in-system programmable flash
8 KB RAM, 4 KB with data retention in all power modes
Powerful DMA functionality
Very few external components
Only a single crystal needed for mesh network systems
Low current consumption (RX: 27mA, TX: 27mA, microcontroller running at 32 MHz)
Only 0.5µA current consumption in power-down mode, where external interrupts or the RTC can wake up the system
0.3µA current consumption in power-down mode, where external interrupts can wake up the system
Very fast transition times from low-power modes to active mode enables ultra low average power consumption in low duty-cycle systems
CSMA/CA hardware support
Wide supply voltage range (2.0V - 3.6V)
Digital RSSI / LQI support
Battery monitor and temperature sensor
ADC with up to eight inputs and configurable resolution
128-bit AES security coprocessor
Two powerful USARTs with support for several serial protocols.
Hardware debug support
One IEEE 802.15.4 MAC Timer, one general 16-bit timer and two 8-bit timers
RoHS compliant 7x7mm QLP48 package
21 general I/O pins, two with 20mA sink/source capability