DS2703U+T&R Maxim Integrated Products, DS2703U+T&R Datasheet - Page 19

• Manufacturer Part Number: DS2703U+T&R
• Description: IC BATT AUTHENTICATE SHA-1 8UMAX
• Manufacturer: Maxim Integrated Products

Specifications of DS2703U+T&R

• Function: Battery Authentication
• Battery Type: Lithium-Ion (Li-Ion)
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -20°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DS2703 SHA-1 Battery Pack Authentication IC
COMPUTATION AND PROGRAMMING
The Compute Next Secret operation waveform is shown in Figure 11. The user issues a 1-Wire reset followed by a
Skip ROMID command, Match ROMID plus the ROMID, Search or Read Net, followed by the Compute Next Secret
command. The system host must connect the low impedance source to the DQ line within time t
and for a duration
D
of time t
. The DQ line is then pulled to V
for t
milliseconds and then returned to nominal voltage. The fast
SHA
PP
PPW
rise and fall time requirements for the programming pulse are required to prevent damage during the transition
between normal communication mode and programming mode.
Figure 11. Compute Next Secret Function Command
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