Union Semiconductor

UM3243EEUS

Transceiver 3V~5.5V 250Kbps TSSOP-28 Drivers, Receivers, Transceivers RoHS

TSSOP-28ROHS CompliantActive

Low Supply Current, 3V to 5.5V, 250kbps, 3-Driver/5-Receiver, Enhanced ESD Protection Smart RS-232 Transceivers

Manufacturer: Union Semiconductor
Manufacturer part #: UM3243EEUS
Store part #: C7542892
Package / case: TSSOP-28
Category: Drivers, Receivers, Transceivers
Packaging: Tape & Reel (TR)

Datasheet (PDF)

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3,000 in stock

#C7542892

Stock & price checked 6 days ago

Quantity	Unit price	Pack price
1+	₹79.14	₹79.14
10+	₹66.35	₹663.50
30+	₹60.06	₹1,801.80
100+	₹53.78	₹5,378.00
500+	₹49.88	₹24,940.00
1,000+	₹47.92	₹47,920.00

Quantity (min 1)

1 × ₹79.14

₹79.14

excl. GST

₹93.39 incl. 18% GST

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Dispatch in 7–10 working days
GST invoice with every order
Standard pack: 3,000 per reel

UM3243EEUS

₹79.14 for 1 + GST

Specifications

Type: Transceiver
Voltage - Supply: 3V~5.5V
Data Rate: 250Kbps
Operating Temperature: -40℃~+85℃
ESD Protect: ±15kV
charge pump: Yes
Number of Drivers: 3
Features: Low-power mode;Wake-up function
Number of Receivers: 5
Quiescent Supply Current: 1mA

Packaging & compliance

RoHS: ROHS Compliant
Lifecycle: Active
Packaging: Tape & Reel (TR)
Standard pack: 3,000 / Reel
Sold per: Piece
Minimum order: 1
Unit weight: 0.261 g

Overview

The UM3243 series are 3-driver/5-receiver 3V-5.5V powered RS-232 transceivers featuring Auto Power-Off and low supply current, when no valid RS-232 level signal is sensed on any receiver inputs, the charge pump circuit and drivers will be powered off. Disconnection of the RS-232 cable or poweroff of the transmitters of the attaching peripherals will lead to Power-Off mode. When a valid level is applied to any RS-232 receiver inputs, the chip will turn on again. The Auto Power-Off mode helps to save power without changing the existing system. The UM3243 transceivers have a regulated discontinuous mode dual charge pump power supply and low-dropout transmitters, which combine to deliver true RS-232 performance from a single +3V to +5.5V supply. Data rate of 250kbps is guaranteed. The UM3243 needs only four 0.1μF capacitors in 3.3V operation, and can operate from input voltages ranging from +2.7V to +5.5V. They are ideal for 3.3V-only systems, mixed 3.3V and 5.0V systems, or 5.0V-only systems that require true RS-232 performance or EIA/TIA-562 levels of ±3.7V with supply voltages as low as 2.7V. The UM3243 includes one complementary always-active receiver. This receiver can monitor an external device (such as a modem) in Power-Off. The UM3243 also includes an always-active INVALID output which indicates valid RS-232 signal levels on any receiver inputs. It is usually used in UART wakeup. The UM3243 also features enhanced ESD protection with ±15kV for human body mode and ±8kV for IEC61000-4-2 contact discharge mode.

Applications

Industrial Controllers and Instruments
Notebooks, Palmtop PCs and Laptops
Networking Routers and Switches
Peripherals Printers, PDAs and POS

Key features

Meets True EIA/TIA-232-F Standards from a +3.0V to +5.5V Power Supply
Meets EIA/TIA-562 Levels of ±3.7V with Supply Voltages as Low as 2.7V
Auto Power-Off Feature to Disable Driver Outputs when No Valid RS-232 Signal is Sensed
250kbps Minimum Transmission Rate
0.1μA (Typ) Low Power-Off Current
Accepts 5V Logic Input with 3.3V Supply
Latch-Up Performance Exceeds 200mA
Enhanced ESD Specifications for RS-232 Pins: ±15kV Human Body Mode ±8kV IEC61000-4-2 Contact Discharge Mode
Available in SSOP28, TSSOP28, SOP28 and QFN32 Packages

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