BU21072MUV_16 Datasheet, PDF (1/40 Pages) Rohm – Capacitive Switch Controller ICs

Capacitive Controller ICs
Capacitive Switch Controller ICs
BU21072MUV / BU21078MUV / BU21078FV
General Description
BU21072MUV/BU21078MUV/BU21078FV
is a capacitive sensor controller for switch operation.
In addition to a regular simple switch, support matrix
switches which are arranged in the matrix sensors. If
external noise and temperature drift are detected, the
automatic self-calibration is operated.
Include LED controller with PWM function.
Features
■ 10 capacitive sensor ports.
(BU21072MUV)
12 capacitive sensor ports.
(BU21078MUV / BU21078FV)
■ Supported Matrix switches.
Maximum 16 switches.
(BU21072MUV)
Maximum 36 switches.
(BU21078MUV / BU21078FV)
■ Automatic self-calibration.
■ Continued touch detection.
■ LED controller with PWM function.
■ Inform the detected result of switch operation by
interrupt.
■ 2-wire serial bus interface.
■ Single power supply.
■ Built-in Power-On-Reset and Oscillator.
Applications
■ Appliance that require multiple switches.
■ Information appliance as printer.
■ AV appliance as digital TV and HDD recorder.
■ Notebook PC.
Typical Application Circuit
VDD
VDD
VDD
VDD
Key Specifications
■ Input voltage range
■ Operating temperature range
■ Operating current
3.0 to 5.5V
-20 to 85°C
3.5mA (Typ.)
■ Scan rate
Packages
BU21072MUV :
VQFN024V4040
BU21078MUV :
VQFN028V5050
BU21078FV :
SSOP-B28
16msec (Typ.)
4.00 ㎜×4.00 ㎜×1.00 ㎜
5.00 ㎜×5.00 ㎜×1.00 ㎜
10.00 ㎜×7.60 ㎜×1.35 ㎜
VQFN024V4040
VQFN028V5050
SSOP-B28
21
22
SIN7 (*2)
SIN6
SIN13
SIN5
SIN14
SIN4
SIN3
28
1
BU21078
TOP VIEW
15
14
LED0
INT
SDA
SCL
TEST
VSS
DVDD _1.0uF
8
7
VDD
VDD
HOST
(*1) Unused LED pin are OPEN.
(*2) Unused SIN pin are OPEN.
Recommended DT number : DTC143ZE
Figure 1. Typical Application Circuit
○Product structure：Silicon monolithic integrated circuit
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TSZ22111・14・001
○This product is not designed protection against radioactive rays
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TSZ02201-0L5L0F300640-1-2
14.Jul.2016 Rev.004