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UT3223 の電気的特性と機能

UT3223のメーカーはUNISONIC TECHNOLOGIESです、この部品の機能は「MULTICHANNAEL RS-232 LINE DRIVERS/RECEIVERS」です。


製品の詳細 ( Datasheet PDF )

部品番号 UT3223
部品説明 MULTICHANNAEL RS-232 LINE DRIVERS/RECEIVERS
メーカ UNISONIC TECHNOLOGIES
ロゴ UNISONIC TECHNOLOGIES ロゴ 




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UT3223 Datasheet, UT3223 PDF,ピン配置, 機能
UNISONIC TECHNOLOGIES CO., LTD
UT3223
Preliminary
+3.0V TO +5.5V POWER SUPPLY,
250KBPS, MULTICHANNAEL
RS-232 LINE
DRIVERS/RECEIVERS
DESCRIPTION
The UTC UT3223 consists of 2 drivers and 2 receivers. It meets
ElA/TIA-232 and V.28/V.24 specifications, it intended for notebook
computer applications. A high-efficiency, dual charge-pumps power supply
and a low-dropout transmitter combine to deliver true RS-232 performance
from a single +3.0V~+5.5V power supply. A guaranteed data rate of
250kbps provides compatibility with popular software for communicating
with PCs.
The UTC UT3223 achieves 1µA supply current in shutdown condition.
When the UT3223 doesn’t detect a valid signal level on its receiver inputs,
the on-board power supply and drivers will shutdown, and when a valid
level is applied to any RS-232 receiver input, then the system turns on
again. Therefore, the system saves power without changes to the existing
BIOS or operating system.
The UTC UT3223 requires only 0.1µF capacitors in 3.3V operation, and
can operate from input voltages ranging from +3.0V ~+5.5V. It is ideal for
3.3V-only systems, 5.0V-only systems, or mixed 3.3V and 5.0V systems
that require true RS-232 performance.
FEATURES
* Operates With 3.0V~5.5V Power Supply
* Two Drivers and Two Receivers
* Operates Up To 250 kbps
* Designed to Transmit at a Data Rate of 250 kbps
* Low Standby Current (1µA Typical)
* External Capacitors (4*0.1µF)
* Accepts 5.0V Logic Input With 3.3V Supply
* Serial-Mouse Drivability
* Exceeds ±8KV ESD Protection(HBM) for RS-232 I/O Pins
ORDERING INFORMATION
Ordering Number
UT3223G-P20-R
Package
TSSOP-20
CMOS IC
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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UT3223 pdf, ピン配列
UT3223
BLOCK DIAGRAM
Preliminary
CMOS IC
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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UT3223 電子部品, 半導体
UT3223
Preliminary
CMOS IC
DETAILED DESCRIPTION
Charge-Pump Voltage Converter
The UTC UT3223 consists of a regulated dual charge pumps that provide output voltages of +5.5V and -5.5V,
regardless of the input voltage (VCC) changing from +3.0V to +5.5V.
The charge pumps operate in a discontinuous mode: if the output voltages are less than 5.5V, the charge pumps
are enabled; if the output voltages exceed 5.5V, the charge pumps are disabled.
Each charge pump requires a flying capacitor (C1, C2) and a reservoir capacitor (C3, C4) to generate the V+ and
V- supplies, refer to application circuit.
RS-232 Transmitters
UTC UT3223’s transmitters are inverting level translators that convert CMOS-logic levels to 5.0V EIA/TIA-232
levels. They guarantee a 250kbps data rate with worst-case loads of 3kin parallel with 1000pF, providing
compatibility with PC-to-PC communication software.
Transmitters can be paralleled to drive multiple receivers or mouse. When FORCEOFF is driven to ground, or
shutdown circuitry senses invalid voltage levels at all receiver inputs, the transmitters are disabled and the outputs
are forced into a high-impedance state.
RS-232 Receivers
The UTC UT3223’s receivers convert RS-232 signals to CMOS-logic output levels. All receivers have one
inverting three-state output. In shutdown or in autoshutdown, the UT3223’s receivers are active. Drive EN high to
place the receiver in a high-impedance state.
Table 1. EN Control Truth Table
EN R_OUT
0 Active
1 High-Z
Shutdown Function
A 1µA supply current is achieved with shutdown feature, which operates when FORCEON is low and
FORCEOFF is high. When the UTC UT3223 senses no valid signal levels on all receiver inputs for 30µs, the
on-board power supply and drivers are shut off, reducing supply current to 1µA. This occurs if the RS-232 cable is
disconnected or the connected peripheral transmitters are turned off. The system turns on again when a valid level is
applied to any RS-232 receiver input. As a result, the system saves power without changes to the existing BIOS or
operating system. INVALID indicates the receiver inputs’ condition, when using shutdown function, the INVALID
output is high when the device is on and low when the device is shut down.
Table 2. Shutdown Logic Control Truth Table
OPERATION STATUS
Normal Operation (Forced On)
Normal Operation (AutoShutdown)
Normal Operation (AutoShutdown)
Shutdown (Forced Off)
FORCEOFF
INPUT
H
H
H
L
FORCEON
INPUT
H
L
L
X
INVALID
OUTPUT
X
H
L
X
T_OUT
Active
Active
High-Z
High-Z
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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共有リンク

Link :


部品番号部品説明メーカ
UT3222

3V TO 5.5V MULTICHANNEL RS-232 LINE TRANSCEIVERS

UNISONIC TECHNOLOGIES
UNISONIC TECHNOLOGIES
UT3223

MULTICHANNAEL RS-232 LINE DRIVERS/RECEIVERS

UNISONIC TECHNOLOGIES
UNISONIC TECHNOLOGIES


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