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參數(shù)資料
| 型號(hào)： | UR5HC703 |
| 廠商： | Semtech Corporation |
| 英文描述： | Extremely Low-Power Keyboard Encoder(極低功耗的鍵盤譯碼器) |
| 中文描述： | 極低功耗鍵盤編碼器（極低功耗的鍵盤譯碼器） |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 68K |
| 代理商： | UR5HC703 |
SerialCoder
TM
UR5HC703-600
Extremely Low-Power Keyboard
Encoder Interfaces RS-232
SerialCoder is a trademark of Semtech
Corporation. All other trademarks belong to their
respective companies.
Copyright 1999-2001 Semtech Corporation
DOC5-703-600-DS-105
www.semtech.com
1
HID & SYSTEM MANAGEMENT PRODUCTS, H/PC IC FAMILY
DESCRIPTION
FEATURES
1
9
16
8
25
32
24
17
UR5HC703-600-FG
LQFP
C2
C1
C0
C14
C13
TxD
C12
R7
OSCIN
_OSCOUT
VSS
C7
C8
C9
C10
C11
C
C
C
C
V
_
V
V
C
R
R
R
R
R
R
R
8 x 16 matrix encoding
9600 Baud 8N1 serial data format
IC is independent of the
keyboard layout
Extremely low-power operation,
transparent to the host
Average current consumption of
less than 1 μA at room
temperature; 10 μA at 85°C
Customized versions available
TTL/CMOS output-only
asynchronous serial interface
to the host (direct connection to
the UART)
Very simple serial protocol — two-
byte identification string on power-
up; single-byte matrix-position for
each key-press or key-release
Robust algorithm for ghost-key
elimination
The SerialCoder
TM
UR5HC703 is an
extremely low-power, “off-the-shelf”
serial keyboard encoder. Robust,
tiny and flexible, the IC is a good
match for any application where the
use of complicated keyboard
protocols are not required and
where asynchronous serial interface
hardware is available.
The SerialCoder
TM
provides
unprecedented power consumption
minimization, making it ideal for use
in add-on keyboards for handheld
and cellular / web phones and
single-board systems designed for
portable applications. The IC
provides extremely low-power
operation, transparent to the host.
Power consumption is reduced to
just the circuit’s leakage when all
keys are released. The average
current consumption is less than 1
μA at room temperature and 10 μA
at 85°C.
If a single key or groups of keys are
stuck in the depressed position, the
IC will enter a total shutdown after a
10-minute wait — to protect against
unintended and unnecessary
discharge of the batteries in the
host.
Custom versions of the
SerialCoder
TM
are available with
hardware handshaking for the
communication channel, support for
extra-low-power operations of the
host, various baud rates and full-
duplex I/O, etc. The SerialCoder
TM
is
simple to implement. It requires few
external components and utilizes a
tiny, low-profile 32-pin LQFP
package that measures 7mm x
7mm.
APPLICATIONS
Built-in keyboards for Palm and
H/PC devices
Add-on accessory keyboards for
Palm and H/PC devices
Portable personal computers
Instrumentation
Remote control
Cellular phones
PIN ASSIGNMENTS
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UR5HC703-600 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SerialCoder 600 - Serial-interface keyboard encoder for accessory keyboards for hand-held devices |
| UR5HC703-600-FG | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:USAR SerialCoderTM Low-Power Keyboard Encoder interfaces RS-232 |
| UR5HC703-600-FQ | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:USAR SerialCoderTM Low-Power Keyboard Encoder interfaces RS-232 |
| UR5HC703-700 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SerialCoder 700 - Very low-power serial-interface keyboard encoder for hand-held devices |
| UR5HC703-IR20 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SerialCoder IR - Very low-power serial-infrared-interface keyboard encoder for accessory keyboards for PCs |
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