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PDF UTRS485 Data sheet ( Hoja de datos )
| Número de pieza | UTRS485 | |
| Descripción | RS-485 / RS-422 TRANSCEIVERS | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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UNISONIC TECHNOLOGIES CO., LTD
UTRS485
Preliminary
FAIL-SAFE, 2.5MBPS, RS-485 /
RS-422 TRANSCEIVERS WITH
±15KV ESD-PROTECTED
CMOS IC
DESCRIPTION
The UTC UTRS485 is a half-duplex transceiver designed for
RS-485 data bus network, which contains one transmitter and one
receiver. The UTC UTRS485 features a fail-safe receiver, which
guarantees the receiver to output high when the receiver inputs are
open, short or idle.
The UTC UTRS485 also features a hot-swap glitch free protection
circuits which guarantee outputs of both the transmitter and the
receiver in a high impedance state during the power up period. So that
the large short current from power to ground will be disable by glitch
free function, which will save the power and enhance the efficiency of
the power up.
The UTC UTRS485 is optimized for signal rates up to 2.5Mbps
with differential voltage of 2.3V. The UTC UTRS485 also has the
thermal shutdown function when the temperature is over 150℃ and
the protection of the current limitation in the transmitter to protect the
itself from the damage by the system-fault conditions during normal
operation.
SOP-8
FEATURES
* Meet the requirements of the EIA/TIA-485 standards.
* 5.0V single power supply.
* True fail-safe receiver while maintaining EIA/TIA-485 compatibility.
* Hot-Swap glitch free protection on control inputs.
* Up to 256 transceivers on the bus.
* Driver short circuit current limit.
* Thermal shutdown for overload protection.
ORDERING INFORMATION
Ordering Number
UTRS485G-S08-R
Package
SOP-8
Packing
Tape Reel
UTRS485G-S08-R
(1)Packing Type
(2)Package Type
(3)Green Package
(1) R: Tape Reel
(2) S08: SOP-8
(3) G: Halogen Free and Lead Free
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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UTRS485
Preliminary
CMOS IC
SWITCHING CHARACTERISTICS
(VCC=+5.0V ±5%, TA=TMIN to TMAX, unless otherwise noted.) (Note 1, 2)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
Driver Input to Output
tPLH
tPHL
Fig.3 and 5, RDIFF=54Ω, CL1=CL2=100pF
10 50 100 ns
10 50 100 ns
Driver Output Skew to Output
Driver Rise or Fall Time
tSKEW Fig.3 and 5, RDIFF=54Ω, CL1=CL2=100pF
tDR, tDF Fig.3 and 5, RDIFF=54Ω, CL1=CL2=100pF
10 ns
3 15 40 ns
Driver Enable to Output High
Driver Enable to Output Low
tZH Fig.4 and 6, CL=100pF, S2 Closed
tZL Fig.4 and 6, CL=100pF, S1 Closed
80 150
80 150
ns
ns
Driver Disable Time from Low
Driver Disable Time from High
tLZ Fig.4 and 6, CL=15pF, S1 Closed
tHZ Fig.4 and 6, CL=15pF, S2 Closed
80 150
80 150
ns
ns
Receiver Input to Output
|tPLH - tPHL| Differential
Receiver Skew
tPLH,
tPHL
tSKD
Fig.3 and 7, RDIFF=54Ω, CL1=CL2=100pF
Fig.3 and 7, RDIFF=54Ω, CL1=CL2=100pF
20 500 1000 ns
100 ns
Receiver Enable to Output Low
Receiver Enable to Output High
tZL Fig.2 and 8, CRL=15pF, S1 Closed
tZH Fig.2 and 8, CRL=15pF, S2 Closed
30 60
30 60
ns
ns
Receiver Disable Time from Low tLZ Fig.2 and 8, CRL=15pF, S1 Closed
Receiver Disable Time from
High
tHZ Fig.2 and 8, CRL=15pF, S2 Closed
30 60
30 60
ns
ns
Notes: 1. All currents into the device are positive; all currents out of the device are negative. All voltages are
referenced to device ground unless otherwise specified.
2. All typical specifications are given for VCC=5V and TA=+25°C
3. Supply current specification is valid for loaded transmitters when DE=0V
4. Applies to peak current
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R113-011.c
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| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet UTRS485.PDF ] | |
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