BQ2022A_17 Datasheet, PDF (19/37 Pages) Texas Instruments – 1K-Bit Serial EPROM with SDQ Interface

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8 Application and Implementation
bq2022A
SLUS724E – SEPTEMBER 2006 – REVISED MARCH 2016
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
A typical application consists of a microcontroller that is configured to be a SDQ communication host device and
the bq2022A being the SDQ slave device. The host and slave have open drain functionality for which a pull-up
resistor (typically 10 kΩ) is required connected to a pull-up voltage in the range of 2.65 V to 5.5 V.
8.2 Typical Application
No additional capacitance is needed on the SDQ line and may result in a communication failure.
VPU
bq2022 A
SDQI
SDQ
1
Communications
Controller
CPU
SDQO
VSS
3
VSS
2
HOST
8.2.1 Design Requirements
Figure 18. Typical Application Circuit
DESIGN PARAMETER
Pull-up voltage
Operating free-air temperature
Pull-up resistor
Table 4. Design Parameters
EXAMPLE VALUE
2.65 V to 5.5 V
–20°C to 70°C
10 kΩ typ
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