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BQ4842YMA-85 Datasheet(PDF) 2 Page - Texas Instruments

Part # BQ4842YMA-85
Description  RTC Module With 128Kx8 NVSRAM
Download  18 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

BQ4842YMA-85 Datasheet(HTML) 2 Page - Texas Instruments

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Functional Description
Figure 1 is a block diagram of the bq4842Y. The follow-
ing sections describe the bq4842Y functional operation,
including memory and clock interface, data-retention
modes, power-on reset timing, watchdog timer activa-
tion, and interrupt generation.
2
Figure 1. Block Diagram
VCC
CE
OE
WE
Mode
DQ
Power
<VCC (max.)
VIH
X
X
Deselect
High Z
Standby
VIL
XVIL
Write
DIN
Active
>VCC (min.)
VIL
VIL
VIH
Read
DOUT
Active
VIL
VIH
VIH
Read
High Z
Active
<VPFD (min.) > VSO
X
X
X
Deselect
High Z
CMOS standby
≤ VSO
X
X
X
Deselect
High Z
Battery-backup mode
Truth Table
Sept. 1996 C
bq4842Y


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