BU1851GUW | GPIO ICs | Analog Switches / Logics ICs | ICs

Key Encoder IC

BU1851GUW

Data Sheet

Data Sheet (283K)

Technical Data

Package

RoHS

Application notes

Design Model

Quality information

FAQ

[ Product description ]

Key Encoder IC can monitor up to 8×8 matrix (64 keys), which means to be adaptable to Qwerty keyboard. We adopt the architecture that the information of the only key which status is changed, like push or release, is encoded into the 8 bits data. This can greatly reduce the CPU load which tends to become heavier as the number of keys increase.
(Previously, all key's status is stored in the registers.)
Furthermore, auto sleep function contribute to low power consumption, when no keys are pressed. It is also equipped with the various functions such as ghost key rejection, N-key Rollover, Built-in power on reset and oscillator.

Specifications
Supply voltage (V)	2.20 to 3.60
Num. of GPIO	-
Serial I/F	Original
Power ON Reset	Yes
Num. of Slave Address	-
Output Format	-
Num. of IO VDD	1
Keyencode Function	Yes(max.64keys)
Package size(mm)	4.0×4.0×0.8

[ Pin Configuration ]

Features

・Monitor up to 64-matrix keys
・Under 5uA Stand-by Current
・Built-in Power On Reset
・Ghost key rejection

*The contents described here are just outline for introduction.
Please obtain the specification sheets from us for thorough check before use.

Status Product

Part No.	Package (PDF)	Status *	RoHS	Constitution materials list	Packing Type	Unit Quantity	Minimum Packaging Quantity	Sales	Distribution Inventory
BU1851GUW-E2	VBGA035W040	Active	Yes		Embossed Tape And Reel	2500	2500	Inquiry