Company Profile. Union Semiconductor.

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2 Company Profile Who We Are Founded in 001, is a fabless integrated circuit design company, engaged in inventing, designing and marketing high performance linear and mixed-signal integrated circuits (ICs) for use in a variety of electronic equipment. s products bridge the analog real world and digital world by detecting, measuring, amplifying, converting power supply and providing protection for electronic circuits. Corporate Mission s mission is to continuously develop high quality and innovative mixed signal IC solutions that add value to customers electronics equipment worldwide. Products and Applications Our products include power supplies, power management circuits, analog switches, interface circuits, ESD protection ICs and EMI filters. markets over 180 analog ICs for uses in a wide variety of electronic equipment. These include PCs and their peripherals, portable devices, instrumentation, test equipments and digital consumer electronics. Contact Us, Incorporated. Add: Room 0, No. 570 Shengxia Road, Zhangjiang Hi-Tech Park, Shanghai Zip Code: 0110 Tel: Fax: Website:

3 Table of Contents RS485 Interface 1 RS4 Interface 1 RS3 Interface 1 Level Shifters Appendix Sales Contact

4 Product Selection Guide RS485 Interface Part Number Description Data Rate (Mbps) (Min) Fail Safe Transceivers on Bus Contact ESD (kv) Air Package UM3085EE 5V Supply, 1TX/1RX RS485 Interface 0.5 Yes 5 ±8 ±15 UM3088EE 5V Supply, 1TX/1RX RS485 Interface.5 Yes 5 ±8 ±15 UM3483EE 3.3V to 5.0V Supply, 1TX/1RX RS485 Interface 0.5 Yes 5 ±8 ±15 UM348EE 3.3V to 5.0V Supply, 1TX/1RX RS485 Interface.5 Yes 5 ±8 ±15 UM335EE 5V Supply, 1TX/1RX RS485 Interface 0.5 Yes 5 ±8 ±15 *UM3087EE *UM3487EE 5V Supply, 1TX/1RX RS485 Interface Auto Polarity Reversal 3.3V to 5.0V Supply, 1TX/1RX RS485 Interface Auto Polarity Reversal 0.5 Yes 5 ±8 ± Yes 5 ±8 ±15 RS4 Interface Part Number Description Data Rate (Mbps) (Min) Fail Safe Transceivers on Bus Contact ESD (kv) Air Package UM491EE 5V Supply, 1TX/1RX RS4 Interface.5 Yes 5 ±8 ±15 UM3491EE 3.3V to 5.0V Supply, 1TX/1RX RS4 Interface 10 Yes 5 ±8 ±15 *UM488EE 5V Supply, 1TX/1RX RS4 Interface.5 Yes 5 ±8 ±15 *UM3488EE 3.3V to 5.0V Supply, 1TX/1RX RS4 Interface 10 Yes 5 ±8 ±15 SOP14 DIP14 SOP14 DIP14 RS3 Interface Part Number Description Data Rate (kbps) Operating Temperature ( ) Fail Safe Contact ESD (kv) Air Package UM0EESE Single 5V Powered TX/RX 10-40~85 Yes ±8 ±15 SOP1 UM0EEPE Single 5V Powered TX/RX 10-40~85 Yes ±8 ±15 DIP1 UM0EEUE Single 5V Powered TX/RX 10-40~85 Yes ±8 ±15 TSSOP1 UM3ECSE Single 5V Powered TX/RX 10 0~70 Yes ±8 ±15 SOP1 UM3ECPE Single 5V Powered TX/RX 10 0~70 Yes ±8 ±15 DIP1 UM3ECUE Single 5V Powered TX/RX 10 0~70 Yes ±8 ±15 TSSOP1 UM3EESE Single 5V Powered TX/RX 10-40~85 Yes ±8 ±15 SOP1 UM3EEPE Single 5V Powered TX/RX 10-40~85 Yes ±8 ±15 DIP1 UM3EEUE Single 5V Powered TX/RX 10-40~85 Yes ±8 ±15 TSSOP1 UM33EEUE 3V~5.5V Powered TX/RX 50-40~85 Yes ±8 ±15 TSSOP1 UM33EESE 3V~5.5V Powered TX/RX 50-40~85 Yes ±8 ±15 SOP1 UM33EEAE 3V~5.5V Powered TX/RX 50-40~85 Yes ±8 ±15 SSOP1 UM33EEPE 3V~5.5V Powered TX/RX 50-40~85 Yes ±8 ±15 DIP1 UM3EEUE 3V~5.5V Powered TX/RX with Enable and Shutdown Control 50-40~85 Yes ±8 ±15 TSSOP0 UM31EExx 3V~5.5V Powered 1TX/1RX TSSOP ~85 Yes ±8 ±15 with Enable and Shutdown Control SSOP1 *UM343EExx 3V~5.5V Powered 3TX/5RX 50-40~85 Yes ±8 ±15 TSSOP8 SSOP8 SOP8 QFN

5 Product Selection Guide Level Shifters Part Number Description UM Bit Auto Direction Detect, UM330H -Bit Auto Direction Detect, UM Bit Auto Direction Detect, UM3304Q 4-Bit Auto Direction Detect, UM3304QT 4-Bit Auto Direction Detect, UM Bit Auto Direction Detect, UM30H UM30Q UM30A UM304H 4-Bit Auto Direction Detect, for UM304Q 4-Bit Auto Direction Detect, for UM304UE 4-Bit Auto Direction Detect, for UM31M8 UM31DA UM00U8 UM00S8 UM001P 1-Bit Auto Direction Detect, for Max Data Rate (Mbps) (V) (V) =3.3V ESD (kv) Package (B Port) SOT3-1.~3. 1.5~ ±15 SOT33 DFN ~3. 1.5~ ±15 CSP8 1.~3. 1.5~ ±4 CSP1 1.~3. 1.5~ ±4 QFN ~3. 1.5~ ±4 QFN ~3. 1.5~ ±15 CSP0 1.5~3..3~5.5 4Mbps (Push-Pull) ±15 CSP8 1.5~3..3~5.5 4Mbps (Push-Pull) ±15 DFN ~3..3~5.5 4Mbps (Push-Pull) ±15 QFN ~3..3~5.5 4Mbps (Push-Pull) ±5 CSP1 1.5~3..3~5.5 4Mbps (Push-Pull) ±5 QFN ~3..3~5.5 4Mbps (Push-Pull) ±5 TSSOP14 1.0~ ~ Mbps (Max) ±4 M 1.0~ ~ Mbps (Max) ±4 DFN ~ ~ Mbps (Max) ±4 TS 1.0~ ~ Mbps (Max) ±4 1.0~ ~ Mbps (Max) ±4 SOT33 *: Future product, contact factory.

6 Product Selection Guide ±1V ESD-Protected, Slew-Rate-Limited, High-Speed and Fail-Safe RS485 Transceiver UM3085E/UM3483E Key Features ESD Protection for RS-485 I/O Pins ±1V Human Body Model ±1V IEC , Air Discharge True Fail-Safe Protection Low Current Shutdown Mode -7V to 1V Common-Mode Input Voltage Range Allows up to 5 Transceivers on the Bus Current Limiting for Driver Overload Protection UM3085: 5.0V Powered UM3483: 3.0V to 5.5V Powered The UM3085E, UM3483E are ±1V electrostatic discharge (ESD)-protected, high-speed transceivers for RS-485 communication that contain one driver and one receiver. These devices feature fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open, shorted or idle. This means that the receiver output will be logic high if all transmitters on a terminated bus are disabled (high impedance). RO UM3085/3483 Pin Configurations 1 R 8 V CC Applications RS-485 Transceivers Level Translators Transceivers for EMI-Sensitive Applications Industrial-Control Local Area Networks RE DE DI D 5 B A Fail-Safe, Single Supply Transceiver UM33E/UM3E Key Features Meets True EIA/TIA-3-F Standards from a 3.0V to 5.5V Power Supply Enhanced ESD Specifications: ±1V Human Body Mode ±1V IEC Air Discharge ±8kV IEC Contact Discharge 1μA Low Power Shutdown (UM3E) 50 kbps Minimum Transmission Rate Guaranteed 30V/μs Max Slew Rate Compatible with 1.8V V CC=3.3V Applications Notebooks and Palmtop Computers Battery-Powered Equipments Hand-Held Equipments POS Terminals The UM3E/UM33E is dual driver, dual receiver transceiver solutions intended for portable or hand-held applications. The UM3E features a 1μA shutdown mode that reduces power consumption in battery-powered portable systems. The UM3E and UM33E are pin, package, and functionally compatible with the industry standard products pin out, respectively. 3.3V C5 TTL/CMOS C1 C 1 VCC C1 3 C1-4 C 5 C- 3.3V T1IN TIN 400k 3.3V 400k 1 UM33E C3 V C4 V- T1OUT TOUT V C5 TTL/CMOS C1 C VCC C1 4 C1-5 C C- 3.3V 13 1 T1IN TIN 400k 3.3V 400k 19 UM3E C3 3 V C4 7 V- T1OUT TOUT R1OUT R1IN R1OUT R1IN 1 TTL/CMOS 9 ROUT RIN 8 TTL/CMOS 10 ROUT RIN 9 1 EN 0 SHDN UM33E/UM3E Typical Operating Circuits 3

7 Product Selection Guide 3V to 5.5V, 3-Driver/5-Receiver Transceiver with Auto Shutdown UM343 Key Features Meets True EIA/TIA-3-F Standards from a 3.0V to 5.5V Power Supply Enhanced ESD Specifications: ±1V Human Body Mode ±1V IEC Air Discharge ±8kV IEC Contact Discharge 1μA Low Power Shutdown 50kbps Minimum Transmission Rate Guaranteed 30V/μs Max Slew Rate Latch-Up Performance Exceeds 00mA Hot Swap and Fail-Safe I/O Logic Compatible with 1.8V V CC=3.3V SOP8, SSOP8, TSSOP8 and QFN Packages The UM343 is a 3-driver/5-receiver transceiver with auto shutdown and low supply current. When the UM343 does not sense a valid signal level on their receiver inputs, the on-board power supply and drivers shut down. The UM343 requires only 4 0.1μF capacitors in 3.3V operation, and can operate from input voltages ranging from 3.0V to 5.5V. It is ideal for 3.3V-only systems, mixed 3.3V and 5.0V systems, or 5.0V-only systems that require true performance. 3.3V 0.1µF C1 0.1µF C 0.1µF C1 C C1- C- T1IN VCC UM343 V V- T1OUT C3 0.1µF C4 0.1µF Applications Battery-Powered Systems PDAs Notebooks Laptops Palmtop PCs Hand-Held Equipments TTL/ CMOS TTL/ CMOS TIN T3IN ROUTB R1OUT ROUT R3OUT TOUT T3OUT R1IN RIN R3IN R4OUT R4IN R5OUT R5IN FORCEON VCC TO POWER MANAGEMENT UNIT FORCEOFF INVALID UM343 Typical Operating Circuit 4

8 Product Selection Guide /4-Bit Bidirectional Voltage-Level Translator for Open-Drain and Push-Pull Applications UM30/UM304 Key Features Max Data Rates: 4Mbps (Push-Pull), -Bit for UM30 4-Bit for UM304 Bidirectional, No Direction Control Required 1.5V to 3.V on A Port and.3v to 5.5V on B Port (V CCA V CCB) ±V ESD Protection on B Port No Power-Supply Sequencing Required V CCA or V CCB Can be Ramped First The UM30/304 is /4 channel ESD-protected level translator provide the level shifting necessary to allow data transfer in a multi-voltage system. Externally applied voltages, V CCB and V CCA, set the logic levels on either side of the device. A low-voltage logic signal present on the V CCA side of the device appears as a high-voltage logic signal on the V CCB side of the device, and vice-versa. PU1 ONE-SHOT BLOCK GATE BIAS ONE-SHOT BLOCK PU Applications SPI, MICROWIRE and I C Level Translation Low-Voltage ASIC Level Translation Portable POS Systems Portable Communication Devices Low-Cost Serial Interfaces Cell-Phones GPS Telecommunications Equipments DFN I/O VA_ I/O VB_ N Block Diagram of UM30/UM304 I/O Cell QFN A B1 A 4 9 B OE NC NC CSP8 QFN A 4 5 A1 CSP1 3 OE 7 B 1 8 B1 UM30Q UM30A UM30H UM304H UM304Q 1//4/8-Bit Bidirectional Voltage-Level Translator with Auto Direction Sensing UM3301/UM330/UM3304/UM3308 Key Features Max Data Rates: 100Mbps 1-Bit for UM3301, -Bit for UM330 4-Bit for UM3304, 8-Bit for UM3308 Bidirectional, No Direction Control Required 1.V to 3.V on A Port and 1.5V to 5.5V on B Port (V CCA V CCB) Enhanced ESD Protection on B Ports V CC Isolation Feature: If Either V CC Input is at, All Outputs are in the High-Impedance State OE Input Circuit Referenced to V CCA Low Power Consumption Applications Low-Voltage ASIC Level Translation Portable POS Systems Portable Communication Devices Low-Cost Serial Interfaces Cell-Phones Telecommunications Equipments 1 SOT53 DFN UM3301/UM330/UM3304/UM3308 is level translator with auto direction sensing and enhanced ESD protection. This non-inverting translator uses two separate configurable power-supply rails. The A port is designed to track V CCA. V CCA accepts any supply voltage from 1.V to 3.V. The B port is designed to track V CCB. V CCB accepts any supply voltage from 1.5V to 5.5V. A CSP A1 OE I/O A CSP1 P One Shot 4K N One Shot P One Shot 4K N One Shot Block Diagram of UM3304 I/O Cell QFN I/O B QFN CSP0 5 OE 5 OE 7 A 3 4 B A 3 4 B B 1 8 B1 UM3301B UM3301DA UM330H UM3304 UM3304Q UM3304QT UM3308 5

9 Sales Contact Sales Office, Inc. Add: 501 Great America Pkwy, Suite 30, Santa Clara, CA Tel: (Shanghai) Ltd. Add: Room 0, No. 570 Shengxia Road, Zhangjiang Hi-Tech Park, Shanghai Tel: (8) Fax: (8) (Shenzhen) Ltd. Add: Room 10, Anhui Building, No. 007 Shennan Road, Futian District, Shenzhen Tel: (8) / / Fax: (8) (HK) Ltd. Add: Unit 0, No.8 Science Park West Avenue, Hong Kong Science & Technology Park, NT, Hong Kong Tel: (85)10700 Fax: (85)834311, Beijing Office Tel: (8) , Qingdao Office Tel: (8)

10 Add:Unit 0,No.570 Shengxia Road,Zhangjiang Hi-Tech Park,Shanghai Zip Code:0110 Tel: Fax: Website: