On April 18, 2017, Dalian United Holdings, a leading semiconductor component distributor dedicated to the Asia-Pacific market, announced that its subsidiary has launched the Betterlife BF3290 fingerprint identification chip solution for smartphones. , tablets and computer peripherals, GPS navigators, etc.

The fingerprint recognition function of smartphones is hot, on the one hand, the widespread popularity of smartphones and related applications based on smartphone authentication are exploding. On the other hand, with the birth of the global mobile payment market, the fingerprint identification chip solution has set off a boom in the field of fingerprint payment. Needless to say, fingerprint recognition has become the standard for smartphones.

The Betterlife BF3290/BF3291 fingerprint identification chip solution launched by Dalian Dayou is a push-type fingerprint recognition sensor based on radio frequency detection technology. The detection sensitivity is high, and a high-quality fingerprint image is obtained by detecting the texture of the inner layer of the finger. The BF3290/BF3291 is surface-level injection-molded and can be cut at a size of 9.0-11.5 mm. It has excellent antistatic, abrasion and corrosion resistance. The chip has built-in oscillator circuit, power-on reset circuit and uses SPI interface to support surface coating process, support 360° touch recognition in any direction, meet the needs of mobile terminals, and enhance user experience.

Figure 1 - Functional framework of the Betterlife BF3290/BF3291 fingerprint identification chip solution launched by Dalian Dayou

Function description:

The BF3290/BF3291 is built with a fully customizable digital-to-analog hybrid circuit with built-in oscillator circuitry and power-on reset circuitry to significantly save BOM cost and further reduce the board space required for the overall solution. Provides easy-to-use standard SPI Slaver interface with CPOL=0, CPHA=0 mode (MODE=0), SPICS (chip select signal, “low” level active), SCLK (clock), MOSI (master output slave) Input), MISO (master input slave output) communicates with the outside, and the host computer can easily configure the sensor and read the image data.

Main features:

* 4.8 mm & TImes; 5.6 mm acquisition area;

* Surface flattened LGA plastic package, can be cut in any round/square size at 9.0-11.5mm, Ø39.5mm for BF3290 standard, 9.5mm*9.5mm for BF3291 standard;

* Support decorative Ring ring design;

* 96 x 112 pixels sensor array;

* 508 DPI resolution, 8bit grayscale;

* 50 frames / sec fast acquisition speed @ 8MHz SPI speed;

* Support surface CoaTIng coating process;

* Built-in maximum 66MHz oscillator;

* Built-in power-on reset circuit;

* SPI Slaver interface;

* ESD performance: air > ± 15KV;

* Support cold screen wake-up function;

* Supply voltage:

AVDD: 2.8V (2.6~3.6)

VDDIO: 1.8V (1.6~3.6)

Figure 2 - Photo of Betterlife BF3290/BF3291 Fingerprint Identification Chip Solution Development Board

For more product and program information, please contact the Betterlife Technician of Better Friends Group: Betterlife. Or refer to the official website of the General Assembly, and welcome to pay attention to the official Weibo (@大联大) and the United Nations General WeChat platform: (search for "big league" or micro-signal wpg_holdings plus attention).

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