DS2703G+T&R Maxim Integrated Products, DS2703G+T&R Datasheet - Page 16

• Manufacturer Part Number: DS2703G+T&R
• Description: IC BATT AUTHENTICAT SHA-1 8-TDFN
• Manufacturer: Maxim Integrated Products

Specifications of DS2703G+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-TDFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 7. All Function Commands
Write Challenge
Compute MAC
without ROM_ID and
return MAC
Compute MAC
with ROM_ID and
return MAC
Load Secret
Compute Next Secret
without ROM ID
Compute Next Secret
with ROM ID
Lock Secret
Set Overdrive
Clear Overdrive
Activate Thermistor
Reset
Table 8. Guide to Function Command Requirements
Write Challenge
Compute MAC
Compute Next Secret
Lock Secret,
Set/Clear Overdrive
Load Secret
Reset
COMMAND
COMMAND
STRONG PULLUP
HEX
8D
BB
0C
5A
6A
8B
A9
36
35
30
33
ON DQ
X
X
Writes 64-bit challenge for SHA-1 processing. Required prior to all Compute
MAC and Compute Next Secret commands.
Computes hash of W0-W15 with logical 1’s in place of the ROM_ID.
Computes hash of W0-W15 with the ROM_ID.
Writes the 64-bit Secret to supplied data. Requires programming voltage on
DQ.
Generates new global secret. Requires programming pulse.
Generates new unique secret. Requires programming pulse.
Sets lock bit to prevent changes to the Secret. Requires programming pulse.
Sets 1-Wire interface timings to OVERDRIVE. Requires programming pulse.
Sets 1-Wire interface timings to STANDARD. Requires programming pulse.
Activates the THM output for thermistor measurement. Activation occurs within
50µs of command completion and continues until the VB capacitor is
discharged.
Resets DS2703 (Software POR).
BEFORE READ
ISSUE 00h
16 of 20
X
FUNCTION
Write: 64
Read: up to 160
Write: 64
READ/WRITE
TIME SLOTS
PROGRAMMING
PULSE
X
X
X