5V Operation Only 5V 470 pF See Application Note 148 for additional information. VDD VPP POL RXD 1-W 1-Wire Bus DS2480B 62 Ohms TXD DS9503 GND Return With EPROM Programming 12 V VDD VPP UART or C 5V Operation Only 5V Regulator SIN (RXD) RXD 1-W DS9503 TXD DS9503 GND 1 0 VDD VPP POL Optional filter RXD 1-W DS2480B 62 Ohms 470 pF TXD GND * DS9503 Return M Start 1-Wire Bus DS2480B SOUT (TXD) L 5V POL Stop * only one DS950x ESD protection device with 5V Power Stealing DTR 22 F 0.1 F VPP VDD RTS UART POL Optional filter SIN (RXD) RXD or C See Text SOUT (TXD) 1-W DS2480B TXD GND M Start 0 62 Ohms 470 pF DS9503 Return 1 L 1-Wire Bus Stop DTR +12VDC Programming 5V Regulator Power Stealing VPP RTS SIN (RXD) UART or C BSS110 6.8K 4.7V 1 f Start RXD 1-W See Text 1-Wire Bus * DS2480B DS9503 TXD GND DS9503 Return 1 L POL S D 2.7K SOUT (TXD) VDD M 0 * only one DS950x ESD protection device with 5V Stop 5V SIN (RXD) 2.7K 5.1K 5V DC to DC Converter 12 V VDD 5.1K VPP 2.7K DS2480B UART or C RXD HCPL-2300 SOUT (TXD) 1-Wire Bus * DS9503 GND Return M Start 1-W TXD 1 L POL 0 DS9503 Stop * only one DS950x ESD protection device with 5V Power Stealing DTR 5V Regulator RTS UART 1.5K +12VDC Programming 5V HCPL-2202 SIN (RXD) or C DC/DC Convert. 1.5K VPP VDD POL RXD 1-W 1-Wire Bus * DS2480B SOUT (TXD) HCPL-2300 DS9503 TXD 2.7K GND DS9503 1 f Return 1 L Start M 0 Stop * only one DS950x ESD protection device with 5V PACKAGE TYPE PACKAGE CODE DOCUMENT NO. 8 SO S8+5 21-0041 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 (c) Maxim Integrated 32 The Maxim logo and Maxim Integrated are trademarks of Maxim Integrated Products, Inc.