DS2406 Dual Addressable Switch Plus 1Kb Memory www.maxim-ic.com FEATURES PIN ASSIGNMENT TO-92 6-PIN TSOC PACKAGE Open drain PIO pins are controlled and their logic level can be determined over 1-Wire 1 6 DALLAS bus for closed-loop control DS2406 2 5 3 4 Replaces and is fully compatible with TOP VIEW DS2407 but no user-programmable power-on settings and no Hidden Mode SIDE VIEW PIO channel A sink capability of 50mA at 0.4V with soft turn-on channel B 8mA at See Mech. Drawings 0.4V 1 2 3 Section Maximum operating voltage of 13V at BOTTOM VIEW 1 2 3 PIO-A, 6.5V at PIO-B 1024 bits user-programmable OTP EPROM User-programmable status memory to PIN DESCRIPTION control the device TO-92 TSOC Multiple DS2406s can be identified on a Pin 1 Ground Ground common 1-Wire bus and be turned on or off Pin 2 Data Data Pin 3 PIO-A PIO-A independently of other devices on the bus Pin 4 --- V Unique, factory-lasered and tested 64-bit cc Pin 5 --- NC registration number (8-bit family code + Pin 6 --- PIO-B 48-bit serial number + 8-bit CRC tester) assures error-free selection and absolute ORDERING INFORMATION identity because no two parts are alike DS2406+ TO-92 Package On-chip CRC16 generator allows detection DS2406+T&R TO-92 Package, Tape & Reel of data transfer errors DS2406P+ 6-pin TSOC Package Built-in multidrop controller ensures DS2406P+T&R TSOC Package, Tape & Reel compatibility with other 1-Wire net products Reduces control, address, data, programming + Indicates lead-free compliance. and power to a single data pin Directly connects to a single port pin of a microprocessor and communicates at up to 15.4 kbits/s Supports Conditional Search with user- selectable condition V bondout for optional external supply to cc the device (TSOC package only) 1-Wire communication operates over a wide voltage range of 2.8V to 6.0V from -40C to +85C Low cost TO-92 and 6-pin TSOC packages 1 of 32 033109 DS2406 ADDRESSABLE SWITCH DESCRIPTION The DS2406 Dual Addressable Switch Plus Memory offers a simple way to remotely control a pair of open drain transistors and to monitor the logic level at each transistors output via the 1-Wire bus for closed loop control. Each DS2406 has its own 64-bit ROM registration number that is factory lasered into the chip to provide a guaranteed unique identity for absolute traceability. The devices 1024 bits of EPROM can be used as electronic label to store information such as switch function, physical location, and installation date. Communication with the DS2406 follows the standard Dallas Semiconductor 1-Wire protocol and can be accomplished with minimal hardware such as a single port pin of a microcontroller. Multiple DS2406 devices can reside on a common 1-Wire network and be operated independently of each other. Individual devices will respond to a Conditional Search command if they qualify for certain user-specified conditions, which include the state of the output transistor, the static logic level or a voltage transition at the transistors output. DS2406 BLOCK DIAGRAM Figure 1 PARASITE POWER V INT VDD CC 64-BIT 1-WIRE BUS DATA 1-WIRE LASERED ROM FUNCTION CONTROL PROGRAM MEMORY 8-BIT VOLTAGE FUNCTION SCRATCHPAD DETECT CONTROL CRC16 GENERATOR DATA MEMORY 1024-BIT EPROM (4 PAGES OF 32 BYTES EACH) STATUS MEMORY 5 BYTES EPROM 1 BYTE SRAM PIO-A PIO CONTROL PIO-B 2 of 32