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PDF UT3223 Data sheet ( Hoja de datos )
| Número de pieza | UT3223 | |
| Descripción | MULTICHANNAEL RS-232 LINE DRIVERS/RECEIVERS | |
| Fabricantes | UNISONIC TECHNOLOGIES | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de UT3223 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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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
1 of 9
QW-R502-A91.b
1 page  
UT3223
Preliminary
CMOS IC
ELECTRICAL CHARACTERISTICS(Cont.)
(VCC=+3.0V~+5.5V, C1~C4=0.1µF (Note 2), TA = TMIN to TMAX, Unless Otherwise Specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
Receiver Positive or
Negative Threshold to
INVALID
High
Low
tINVH
tINVL
Fig.2
TYP MAX UNIT
1.0 µs
30 µs
RECEIVER INPUTS
Input Voltage Range
Input Threshold Low
Input Threshold High
Input Hysteresis
Input Resistance
VRR
VRINL
TA=25°C
VRINH TA=25°C
VRINHYS
VRINRES TA=25°C
VCC=3.3V
VCC=5.0V
VCC=3.3V
VCC=5.0V
-25 25 V
0.6 1.2
0.8 1.5
V
1.5 2.4
1.8 2.4
V
0.5 V
3 5 7 kΩ
TRANSMITTER OUTPUTS
Output Voltage Swing
VTOUTSW
All transmitter outputs loaded with 3kΩ to
ground
±5.0
±5.4
V
Output Resistance
Output Short-Circuit Current
Output Leakage Current
VTOUTRES
VCC= V+=V-=0V,
Transmitter output=±2V
ITSC
ITOUT(LK)
VCC=3.0V~5.0V, VOUT=±12V,
Transmitters disabled
300 10M
Ω
±35 ±60 mA
±25 µA
TIMING CHARACTERISTICS
Maximum Data Rate
Receiver Propagation Delay
Receiver Output Time
Transmitter Skew
Receiver Skew
Enable
Disable
Transition-Region Slew Rate
DR
tPHL
tPLH
tR(EN)
tR(DIS)
tTS
tRS
SR
RL=3kΩ, CL=1000pF,
switching
one
transmitter 250
Receiver input to receiver output,
CL=150pF
Normal operation
|tPHL – tPLH|
|tPHL – tPLH|
VCC=3.3V, TA=25°C,
RL=3kΩ~7kΩ,
measured from
+3V CL=220pF~1000pF
~ -3V or -3V~+3V
5
0.15
0.15
200
200
100
50
kbps
µs
ns
ns
ns
ns
35 V/µs
Notes: 1. Typical values are at TA=25°C.
2. C1~C4=0.1µF, measured at 3.3V±10%. C1=0.047µF, C2~C4=0.33µF, measured at 5.0V ±10%.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 9
QW-R502-A91.b
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet UT3223.PDF ] | |
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