Datasheet > UR5HC703-IR20

UR5HC703-IR20

更新时间： 2024-11-27 23:40:43

品牌	Logo	应用领域
其他 - ETC		电脑编码器 PC
页数	文件大小	规格书
10页	86K
描述
SerialCoder IR - Very low-power serial-infrared-interface keyboard encoder for accessory keyboards for PCs

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UR5HC703-IR20 数据手册

SerialCoder™ IR UR5HC703-IR20

Extremely Low-Power Keyboard

Encoder Interfaces IrDA

HID & SYSTEM MANAGEMENT PRODUCTS, KEYCODER™ FAMILY

PRELIMINARY

DESCRIPTION

FEATURES

The SerialCoder™ IR UR5HC703-

IR20 is an extremely low-power, “off-

the-shelf” infrared serial keyboard

encoder. Robust, tiny and flexible,

the IC is a good match for any

application where a low-cost

• 8 x 16 Matrix Encoding

• IC is independent of the keyboard

layout

• Extremely low-power operation,

transparent to the host

• Typical current consumption of

less than 1µA at room

temperature; 10µA at 85°C

• Robust algorithm for ghost-key

elimination

• CMOS output-only asynchronous

serial interface to the host using

standard IrDA

• 9600 Baud 8N1 serial data format

• Very simple serial protocol — two-

byte identification string on

power-up; single-byte matrix-

position for each key-press or

key-release

wireless keyboard is attractive and

an IrDA host is available.

The IC provides extremely low-

poweroperation, transparent to the

host. Power consumption is

reduced to just the circuit’s leakage

when all keys are released. The

typical current consumption is less

than 1µA at room temperature and

10µA at 85°C.

• Low-cost wireless keyboard

solution

APPLICATIONS

• Infrared wireless keyboards

• Personal digital assistant (PDA)

keyboard

• Remote control

• Home entertainment or

automation

• Instrumentation

If a key or group of keys stays in the

depressed position for ten minutes

(with no other keyboard activity), the

IC shuts down to save power.

PIN ASSIGNMENTS

The SerialCoder™ IR is simple to

implement. It requires few external

components and utilizes a tiny, low-

profile 32-pin LQFP package that

measures 7mm x 7mm.

ROW6

ROW5

ROW4

ROW3

ROW2

ROW1

ROW0

COL15

COL3

COL4

COL5

COL6

VDD2

RESET

VSS2

VDD

UR5HC703-IR20-FG

LQFP

SerialCoder is a trademark of Semtech

Corporation. All other trademarks belong to their

respective companies.

DOC5-703-IR20-DS-101

www.semtech.com

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