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OTP 2.4GHz SoCs tailored for low-cost market

Posted: 14 Oct 2009     Print Version  Bookmark and Share

Keywords:wireless SoC  on-time programmable memory  OTP memory 


Nordic Semiconductor has introduced the nRF24LE1 OTP and nRF24LU1+ OTP the target price-sensitive consumer segments of the ultra low-power (ULP) wireless market that do not require flash memory.

Except for a flash-replacing OTP memory, the nRF24LE1 OTP and nRF24LU1+ OTP have the same key features as the existing nRF24LE1 and nRF24LU1+ products. The pair of low-cost one time programmable (OTP) variants target high volume consumer segments such as entry-level wireless PC peripherals (mice and keyboards), remote controls and toys.

In addition, fierce price constraints for low-end products in these sectors that currently do employ wireless connectivity have restricted manufacturers to 27MHz transceivers.

Based on the same technology platform as the nRF24LE1 and nRF24LU1+ flash products, the devices still feature a high-performance ULP nRF24L01+ transceiver core, a enhanced 8051 MCU, lower power oscillators, hardware AES security, and a wide range of application peripherals and interfaces.

Both the devices integrate 16kBytes of program OTP and 1kByte of data OTP. With a fully integrated charge pump the OTP is writable from the chip's MCU enabling the data OTP to be used for emulating non-volatile memory when required.

The nRF24LE1 OTP and nRF24LU1+ OTP inherit the ULP operating characteristics of their flash-based sister products enabling extended operation from small capacity batteries such as AAA or coin cell types.

For example, current consumption of the nRF24LE1+ OTP while transmitting is just 11.1mA (at 0dBm output power) and peak receive current is 13.3mA (at 2Mbps). Average current is in the microampere range (for a typical low duty cycle operation).

Production samples of nRF24LU1+ OTP, plus 5mm x 5mm and 7mm x 7mm nRF24LE1 OTP are available today. The 4mm x 4mm nRF24LE1 OTP will be available in late October.

- Julien Happich
EE Times Europe

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