DS2438Z+ Maxim Integrated Products, DS2438Z+ Datasheet - Page 22

• Manufacturer Part Number: DS2438Z+
• Description: IC MONITOR SMART BATTERY 8-SOIC
• Manufacturer: Maxim Integrated Products

Specifications of DS2438Z+

• Function: Fuel, Gas Gauge/Monitor
• Battery Type: Smart Batteries
• Voltage - Supply: 2.4 V ~ 10 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Operating Supply Voltage: 2.4 V to 10 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Charge Safety Timers: No
• Mounting Style: SMD/SMT
• Temperature Monitoring: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

NOTES:
1. Temperature conversion takes up to 10 ms.
2. A/D conversion takes up to 4 ms.
3. EEPROM writes take up to 10 ms.
SAMPLE COMMAND SEQUENCE Table 12
Example: Bus Master enables the ICA, CCA, and DCA on a single DS2438 and configures it such that
the CCA/DCA information is shadowed to EEPROM. The voltage A/D is configured such that the
DS2438 will perform voltage measurements on the battery (VDD) voltage.
MASTER MODE
RX
RX
RX
RX
RX
RX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
DATA (LSB FIRST)
<9 data bytes>
Read Slots
Presence
Presence
Presence
Presence
BEh00h
4Eh00h
48h00h
Reset
Reset
Reset
Reset
CCh
CCh
CCh
0Fh
22 of 29
Skip ROM
Skip ROM
Read scratchpad data and CRC
Skip ROM
DS2438 returns a “1” when Copy SP is complete
Read pulse
Presence pulse
Issue Write SP 00h command
Sets ICA, CA, EE, AD Bits active
Reset pulse
Presence pulse
Issue Read SP 00h command
Reset pulse
Presence pulse
Issue Copy SP 00h command
Reset pulse
Presence Pulse, done
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