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Capacitive Fingerprint Sensor (1000) BM92S2231-1

US$15.20

In stock

Quantity

46 pieces

Product ID

BM92S2231-1

The product is a capacitive fingerprint sensor with a 9.6 x 12.8 mm sensing pad, capable of storing up to 1,000 fingerprints. It integrates the algorithm and supports various commands for fingerprint registration, recognition, template management, image capture, and more. Additionally, it also offers UART interface for communication. It is suitable for applications of electronic door locks, access control systems, security safes, and so on.

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	1-9	-	US$15.20
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FEATURES

Operating voltage: 3.3V~5.0V
Operating current: < 60mA
Standby current: < 12μA
Maximum fingerprint storage capacity: 1000
- Sensing pad dimension: 9.6 x 12.8mm
- Image size: 192 x 256 pixel
- Resolution: 508dpi
Fingerprint template: 180 x N bytes (the max. value of N is 3)
False Acceptance Rate (FAR): ≤0.001%
False Reject Rate (FRR): ≤3%
Recognition time: < 15ms (1:1)
Power-on initialization time: < 100ms
Registration time: < 10 seconds
UART interface (default baud rate: 115200bps)
Product includes: fingerprint sensor BM92S2231-1 x1 | cable x1
Dimension: 33.4 x 20.4 x 6.2 mm
Net weight: 4.5g

DESCRIPTION

The product integrates a touch key designed to detect finger touches. When a finger touches the metal frame surrounding the fingerprint sensor, pin 1 (KeyOut) outputs a high level; otherwise, it remains low when there is no contact. It significantly reduces power consumption.
The product will enter standby mode upon receiving a command and can be awakened by a finger touch.

To register a fingerprint

Users need to enter an ID number between 0 and 1,000 when registering a fingerprint. The product will check if the ID is valid and available. If the ID is usable, users will be prompted to place their fingers on the sensing pad. If no finger is detected within 60 seconds (the default timeout) during the registration process, the registration will automatically terminate, resulting in a registration failure.

Fingerprints recognition angle

	Full angles detection 1	Single angle detection (same as the registration angle)	Three angles detection	Full angle detection 2
0°	✓	✓	✓	✓
90°	✓	X	X	✓
180°	✓	X	✓	✓
270°	✓	X	✓	✓

⬥ Differences between full angles detection 1 and 2: (1) Recognition time: 1 < 2 (2) Recognition performance: 2 > 1

PIN DESCRIPTION

Pin	Name	Function
1	KeyOut	Touch signal output pin ⬥ Outputs high when a touch is sensed ⬥ Outputs low when no touch is sensed
2	5.0V	Power supply: 5.0V
3	3.3V	Power supply: 3.3V
4	USB_DM	USB_DM reserved pin
5	USB_DP	USB_DP reserved pin
6	UART_RX	UART: RX
7	UART_TX	UART: TX
8	GND	Ground

COMPARISON

Part number	BM92S2231-1	BM92S2222-A
Type	Capacitive	Capacitive
Fingerprint storage (max.)	1000	100
Operating voltage	3.3V~5.0V	3.3V~5.5V
Operating current	< 60mA	< 40mA
Sensing pad dimension	9.6 x 12.8 mm	9.6 x 9.6 mm
Image size	192 x 256 pixel	192 x 192 pixel
Resolution	508dpi	508dpi
False Acceptance Rate (FAR)	≤ 0.001%	< 0.001%
False Reject Rate (FRR)	≤ 3%	< 1%
Interface	UART	UART
Dimension	33.4 x 20.4 x 6.2 mm	33 x 20 x 6 mm

RESOURCES

MCU: HT32F49395, 32-Bit Arm® Cortex®-M4 MCU, including datasheet, package information, etc.
Application note: AN0660EN, HT32F49xxx MCU SPIM Application Guidelines