V4082 EMMICRO | Alldatasheet
Document overview
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Technical content
Features
Unique 48-bit silicon serial number gives 1014 combinations Factory lasered and tested, no two parts alike 8-bit cyclic redundancy check ensures error-free reading Presence detect indicates to the system when first contact is made Zero standby power required Custom serial numbers available Pin compatible with DS 2400, DS 2401 in TO-92 and SOT-223
Applications
Socket identification PCB identification Equipment registration Typical Operating Configuration Control Logic + ROM on chip supply Vcc DATA 100 ohm MOSFETVSS RPUP TX RX Cext V4082SYSTEM Fig. 1 Pin Assignment TO - 9 2 View Fla t Fro n t V4082 123 S OT -223 V4082 123 DAT A N.C. V SS ( G N D ) DAT A VS S (GND) N.C. VS S Pin TO92 Pin SOT-223 Name Function VSS DATA NC VSS Ground return Serial data pin Ground return * Internally connected to pin 2 Fig. 2 EM MICROELECTRONIC - MARIN SA
Copyright © 2004, EM Microelectronic-Marin SA 2 www.emmicroelectronic.com Absolute Maximum Ratings Parameter Symbol Conditions Voltage on Data Pin vs VSS V DATA -0.5 to 7.0V Max. injected current into DATA pin Idata -20 to +20 mA Storage Temperature T STD -55 to +125 °C Power Dissipation Pw 10 mW Table 1 Stresses above these listed maximum ratings may cause permanent damages to the device. Exposure beyond specified operating conditions may affect device reliability or cause malfunction. Handling Procedures This device has built-in protection against high static voltages or electric fields; however, anti-static precautions must be taken as for any other CMOS component. Unless otherwise specified, proper operation can only occur when all terminal voltages are kept within the voltage range. Unused inputs must always be tied to a defined logic voltage level. Operating Conditions Parameter Symbol Min Typ Max Unit External pull up voltage V CC 4.5 5.0 5.5 V External pull up resistance R PUP 5 kΩ External capacitance Cext 800 pF Operating temperature T A -40 25 +85 °C Table 2
Electrical Characteristics
Unless otherwise specified: All voltages are referenced to VSS, VDD= 5.0V, TA=-40 to +85°C. Parameter Symbol Test Conditions Min Typ Max Unit DC Characteristics Data Input Logic Low Data Input Logic High Sink Current Output Logic Low Output Logic High Input Resistance Operating Charge (after supply diode) Current consumption VIL VIH IL VOL VOH RIN COP Idata VOUT = 0.4V I = 4mA Modulator FET off Modulator FET on, 72 time slots Modulator FET off -0.2 2.2 4.0 1.2 0.4 V CC 0.4 VCC* V V mA V V MΩ nC μA * Depends on resistive divider RIN / (RPUP+RIN) Table 3 Timing Characteristics Unless otherwise specified: VDD= 5.0V ±10%, TA=-40 to +85°C cf. remarks under "Effect of C ext" Parameter Symbol Test Conditions Min Typ Max Unit Time Slot Period TSLOT 60 120 μs Write 1 Low Time TLOW1 1 15 μs Write 0 Low Time TLOW0 60 120 μs Read Data Valid TRDV 15 μs Read Data Setup TSU 1 μs Frame Sync TSYC 1 μs Reset Low Time TRSTL 480 μs Reset High Time TRSTH 480 μs Presence Detect High TPDH 5 50 μs Presence Detect Low TPDL 60 240 μs Table 4
Copyright © 2004, EM Microelectronic-Marin SA 3 www.emmicroelectronic.com Timing Waveforms RESET PULSE/ PRESEN C E DETEC T tS Y C tR S T L tP DH tPDL tR S T H FIRST BIT OF 1-WIRE PROTOCOL PRESENCE DETECT DRIVEN BY 1-WIRE DEVICE IDLE STATERESET PULSE DRIVEN LOW BY HOST Fig. 3 tSLOT tLOW1 WRITE 1 tSYC 1-WIRE WRITE TIMING tSLOTtSYC tLOW0 WRITE 0 Fig. 4a Fig. 4b
Copyright © 2004, EM Microelectronic-Marin SA 4 www.emmicroelectronic.com tSLOTtSYC tSU tRDV READ 1 1-WIRE READ TIMING READ 0 tSYC tSLOT tSU tRDV Fig. 5a Fig. 5b 1-WIRE PROTOCOL State 1: RESET (from System) State 2: COMMAND WORD (from System) State 3: TYPE IDENTIFIER (to System) State 4: SERIAL NUMBER AND CRC (to System and CRC Value) Fig. 6
Copyright © 2004, EM Microelectronic-Marin SA 6 www.emmicroelectronic.com Custom V4082 Upon special request, the V4082 is available with portions of the 48-bit serial number defined by the customer. These special parts are designated V4082xxx. The custom 48-bit number has two specific subfields of which EM Microelectronic-Marin will assign a customer IC number in the most significant 12 bits. The next most significant 8 bits are selectable by the customer as a starting value, and the least significant 28 bits are non-selectable and will increment by one, starting at 0000h. The type identifier code for a custom V4082 is 81h. The default memory map is as follows (first bit out (LSB) = Bit 0): NNNNNNNNCCCCCCCC 00000000 11111100 0000NNNN 10000001NNNNNNNN NNNNNNNN 63 56 55 48 47 40 39 32 31 24 23 16 15 8 7 0 CRC-Code Customer # (default) incremented number codecust. start value (default) Type ID (81h) MSB LSB LSBMSB Repetitive Read-out of data If the system generates more read time slots than necessary, the V4082 continues to output the ROM code, restarting from zero address. By issuing a reset sequence, this procedure can be stopped. The V4082 will then again issue a presence detect signal and expect the command word from the system.
Copyright © 2004, EM Microelectronic-Marin SA 7 www.emmicroelectronic.com
Package Information
Dimensions of TO-92 Package Dimensions of SOT_223 Package F i g . 7 F i g . 8
Ordering Information
When ordering, please specify the complete Part Number below Part Number Version Package Delivery Form Package Marking V4082V1T03E TO-92 Ammopack 4082 01 V4082V1ST3B V01 SOT-223 Tape & Reel 4082 01 V4082V2T03E TO-92 Ammopack 4082 02 V4082V2ST3B V02 SOT-223 Tape & Reel 4082 02 Note: Version 01 (V01) corresponds to the standard version. Other versions might be available upon request for a minimum order quantity (Please contact EM Microelectronic at http://www.emmicroelectronic.com or info@emmicroelectronic.com) EM Microelectronic-Marin SA (EM) makes no warranty for the us e of its products, other than those expressly contained in the Company's standard warranty which is detailed in EM's G eneral Terms of Sale located on the Company's web site. EM assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of EM are granted in connection with the sale of EM products, expressly or by implications. EM's products are not authorized for use as component s in life support devices or systems. Please note that the V4082 circuits are not to be sold or used in the United States as they may interfere with third party US patent rights. © EM Microelectronic-Marin SA, 11/05, Rev.E