SP 3224 and SP 3225 3 3 V

SP 3224 and SP 3225 3. 3 V or 5 V RS-232 Transceivers with Auto On-Line® Plus

Features & Benefits • Basic serial port • 2 drivers, 2 receivers • SP 3224 E at 250 Kbps data rate REA • SP 3225 E at 1 Mbps data rate DY • Power-saving Auto On-Line® Plus • • Automatically enters 1μA mode when idle STATUS output detects cable plug/unplug Automatic wakeup on signal activity READY pin indicates valid Tx voltage • ± 15 k. V ESD (IEC 1000 -4 -2) • Small, Pb-free packages • 20 pin TSSOP, SSOP Company Confidential 2 SP 3224 E SP 3225 E

Auto On-Line® Plus Saves Power • Ordinary RS 232 transceivers consume power • Drivers are always on and driving into a 5 kΩ load impedance • Load impedance is not very high • Charge pumps running continually • Auto On-Line® Plus: Exar’s most advanced automatic shutdown/wakeup saves power • Automatically shuts down drivers/pumps and sends transceiver into 1 n. A sleep mode when idle • Automatically wakes-up to transmit data if it sees a data transition on receiver input or driver input • No user intervention or software required Company Confidential 3

Target Applications • Power-saving RS 232 transceiver: • SP 3224 in most consumer and general embedded applications • SP 3225 for high speed applications like instrumentation and POS • Synch cables/cradles for handhelds • Use in conjunction with low-voltage UARTs or microcontrollers • Cross with MAX 3224/5, ICL 3224/5 Company Confidential 4

Typical RS 232 Port with SP 3224 Ideal for general serial port applications that do not require the full set of modem/hand-shaking signals Company Confidential 5

SP 3224 Competitive Overview Vendor Part Number Cross-Type Direct Equivalents Maxim MAX 3224 Drop-In Intersil ICL 3224 Drop-In Similar Devices (without Auto On-Line Plus) Exar SP 3223 EB Pin-compatible Maxim MAX 3223 Pin-compatible Intersil ICL 3223 Pin-compatible TI MAX 3223 Pin-compatible Company Confidential 6

SP 3225 Competitive Overview Vendor Part Number Cross-Type Direct Equivalents Maxim MAX 3225 Drop-In Intersil ICL 3225 Drop-In Similar Devices (without Auto On-Line Plus) Exar SP 3223 EU Pin-compatible TI SN 65 C 3223 Pin-compatible Company Confidential 7

SP 3224 Selection Guide Part Number Temp. Package Ro. HS SP 3224 ECA-L 0 to +70°C 20 pin SSOP Y SP 3224 ECY-L 0 to +70°C 20 pin TSSOP Y SP 3224 EEA-L -40 to 85°C 20 pin SSOP Y SP 3224 EEY-L -40 to 85°C 20 pin TSSOP Y Company Confidential 8

SP 3225 Selection Guide Part Number Temp. Package Ro. HS SP 3225 ECA-L 0 to +70°C 20 pin SSOP Y SP 3225 ECY-L 0 to +70°C 20 pin TSSOP Y SP 3225 EEA-L -40 to 85°C 20 pin SSOP Y SP 3225 EEY-L -40 to 85°C 20 pin TSSOP Y Company Confidential 9

Value Proposition • Auto On-line® Plus automatically enter a low power shutdown if idle and "wake-up" upon detecting activity • Saves power by shutting down the drivers/pumps when not needed to transmit data • This power saving feature functions without system intervention or modifications to software or drivers • Equivalent to other automatic power-saving features • Maxim “Auto Shutdown Plus” • Texas Instruments “Auto-Powerdown Plus” • Intersil “Enhanced Automatic Powerdown” Company Confidential 10 BATT 100%