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부품번호 UM232E
기능 (UM202E / UM232E) Single Supply RS-232 Transceivers
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UM232E 데이터시트, 핀배열, 회로
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Union Microsystems, Inc.
UM202E/232E
High ESD-Protected,Fail-Safe, Single Supply RS-
232 Transceivers
General Description
The UM202E/232E series are low power single supply RS232 interface. The device consists of two line
drivers, two line receivers, and a dual charge pump circuit. The device meets the requirements of TIA/
EIA-232 standard and provides the electrical interface between an asynchronous communication controller
and the serial-port connector.
The on chip charge pump and four small external capacitors act as onboard DC to DC converter, allow
chip operated from single 5V supply, eliminating the need for +/- 10V power supplies, reduce cost and
board space. Chip power supply current is specified at 6.0 mA maximum, making the device ideal for
battery and power conscious applications.
The device operates at data signaling rates over 120 Kb/s. The slew rate of driver is set internally less than
30V/µs and the receivers feature internal noise filtering, eliminating the need for external slew rate and
filter capacitors for reliable operation. The driver inputs and receiver outputs are TTL and CMOS
compatible.
UM202E/232E comes in 16 pin DIP, SOP and SSOP packages, operating over the commercial and industrial
temperature ranges.
The ESD tolerance has been upgraded on these devices to over +/- 15KV for both Human Body Model
and IEC1000-4-2 Air Discharge Method, without latchup. These devices are pin-to-pin compatible with
MAX202/232 devices as well as other popular industry standards.
Applications
Notebook, Subnotebook
Palmtop Computers
Battery-Powered Equipment
Hand-Held Equipment
POS terminal
Network Communication Equipment
Features
ESD Protection for RS-232 Bus Pins up to +/- 15kV Human Body Model
Meets or Exceeds the Requirements of TIA/EIA-232-F and ITU V.28 Standards
Single +5V power supply
Low power, ICC 6.0 mA maximum
Operates up to 120 Kbit/s
BiCMOS Technology
Receiver Noise Filter
Latch-Up Performance Exceeds 200 mA
Pin compatible with industry standard MAX232, ICL232
UM202/232 Datasheet Rev. 0.1 , July 2005
Page 1 of 6
Datasheet pdf - http://www.DataSheet4U.net/




UM232E pdf, 반도체, 판매, 대치품
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Union Microsystems, Inc.
Typical Operating Characteristics
(Typical Operating Circuits, VCC = +5V, TA = +25oC, unless otherwise noted.)
Test Circuits
Figure 1. Transition Slew-Rate Circuit
UM202/232 Datasheet Rev. 0.1 , July 2005
Page 4 of 6
Datasheet pdf - http://www.DataSheet4U.net/

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