Model Information: UM3221EEUE

General Description

The UM3221EEUE is a fail-safe, single-supply RS-232 transceiver designed for portable or hand-held applications. It features low power consumption, high data-rate capability, and enhanced ESD protection. The device is powered by a 3.3V supply and includes one driver and one receiver. It is ideal for applications requiring reliable RS-232 communication with minimal power usage.

Features

• Low Power Consumption: Suitable for battery-powered and low-power systems.
• High Data Rate: Supports data rates greater than 250kbps.
• Enhanced ESD Protection: ±15kV Human Body Mode, ±15kV IEC61000-4-2 Air Discharge, ±8kV IEC61000-4-2 Contact Discharge.
• Fail-Safe and Hot Swap: Ensures reliable operation even when hot swapping or during ESD events.
• Small Footprint: Saves board space with a compact TSSOP16 package.
• Compatibility: Fully compatible with 3.3V-only systems, mixed 1.8V and 3.3V systems, mixed 3.3V and 5.0V systems, and 5.0V-only systems.
• Low Power Shutdown Mode: Reduces power consumption to less than 1μA in shutdown mode.

Applications

• Industrial Automation Equipment
• Battery-Powered Equipment
• Hand-Held Equipment
• POS Terminals

Ordering Information

• Part Number: UM3221EEUE
• Temperature Range: -40°C to +85°C
• Package Type: TSSOP16
• Shipping Quantity: 3000pcs/13 Inch Tape & Reel

Pin Configuration (Top View)

Absolute Maximum Ratings

• Supply Voltage (VCC): -0.3V to +6V
• Voltage on V+: (VCC-0.3) to +7.5V
• Voltage on V-: -7.5V to +0.3V
• Voltage on T_IN: -0.3V to (VCC+0.3)V
• Voltage on R_IN: ±30V
• Voltage on T_OUT: (V--0.3) to (V++0.3)V
• Voltage on R_OUT: -0.3V to (VCC+0.3)V
• Short-Circuit Duration (T_OUT): Continuous
• Power Dissipation (TA=70°C): 754mW (TSSOP16)
• Operating Temperature Range: -40°C to +85°C
• Storage Temperature Range: -65°C to +165°C
• Lead Temperature for Soldering (10s): +300°C

Electrical Characteristics (VCC=+3.0V to +5.5V, C1-C4=0.1μF, TA=TMIN to TMAX)

• DC Characteristics:Supply Current (ICC): 1.5mA (VCC=3.3V, No Load)Shutdown Supply Current (ISHDN): 1μA (SHDN=GND)
• Logic Inputs:Input Leakage Current: ±1μAInput Threshold Low (VIL): 0.8V (VCC=3.3V), 0.8V (VCC=5.0V)Input Threshold High (VIH): 1.6V (VCC=3.3V), 2.2V (VCC=5.0V)
• Transmitter Input Hysteresis: 0.2V (VCC=3.3V), 0.15V (VCC=5.0V)
• Receiver Outputs:Output Voltage Low (VOL): 0.8V (VCC=3.3V, IOUT=10mA), 0.8V (VCC=5.0V, IOUT=10mA)Output Voltage High (VOH): 2.8V (VCC=3.3V, IOUT=-3.0mA), 4.4V (VCC=5.0V, IOUT=-3.0mA)
• Receiver Inputs:Input Voltage Range: -30V to +30VInput Threshold Low: 0.8V to 1.15V (VCC=3.3V), 0.8V to 1.55V (VCC=5.0V)Input Threshold High: 1.35V to 2V (VCC=3.3V), 1.75V to 2V (VCC=5.0V)Input Hysteresis: 0.2VInput Resistance: 3kΩ to 7kΩ

Detailed Description

• Dual Charge-Pump Voltage Converter: The internal power supply consists of a regulated dual charge pump providing output voltages of +7V and -7V over the +3.0V to +5.5V VCC range.
• RS-232 Transmitters: Inverting level translators that convert TTL/CMOS inputs to EIA/TIA-232 output levels, guaranteeing a 250kbps data rate under full load conditions.
• RS-232 Receivers: Convert RS-232 signals to CMOS output levels, accepting inputs up to ±30V and presenting a 3kΩ to 7kΩ input impedance.
• Low Power Shutdown Mode: Reduces supply current to less than 1μA, disabling charge pumps and transmitter outputs.
• ESD Protection: All pins include ESD protection structures, with RS-232 pins surviving up to ±15kV ESD events.
• Hot Swap and Fail-Safe: Ensures logic-high receiver output when receiver inputs are shorted to GND or open, or connected to a line with no driver enabled.

Package Information

• TSSOP16 Outline Drawing:Dimensions:A: 1.20mm (Max)A1: 0.05mm to 0.15mmA2: 0.80mm to 1.05mmb: 0.19mm to 0.30mmc: 0.09mm to 0.20mmD: 4.86mm to 5.10mmE: 4.30mm to 4.50mmE1: 6.20mm to 6.60mme: 0.65mm (BSC)L: 0.45mm to 0.75mmL1: 1.00mm (REF)L2: 0.25mm (BSC)θ1: 0° to 8°θ2: 10° to 14°θ3: 10° to 14°

Green Compliance

• RoHS Compliance: All Union components are compliant with the RoHS directive, supporting customers in their compliance with environmental directives.