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BQ4802YPW Datasheet(PDF) 4 Page - Texas Instruments

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Part # BQ4802YPW
Description  PARALLEL REAL-TIME CLOCK WITH CPU SUPERVISOR
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

BQ4802YPW Datasheet(HTML) 4 Page - Texas Instruments

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bq4802Y
bq4802LY
SLUS464C – AUGUST 2000 – REVISED JUNE 2002
www.ti.com
4
AC TEST CONDITIONS, INPUT PULSE LEVELS VI = 0 V to 3.0 V, tR = tF = 5 NS, VREF = 1.5 V
Figure 1. Output Load A
3 V
100 pF
DOUT
510
962
Figure 2. Output Load B
3 V
5 pF
DOUT
510
962
OPERATING CHARACTERISTICS
READ CYCLE (TA = TOPR, VCC = 5 V)
PARAMETER
TEST CONDITIONS
MIN
MAX
UNIT
tRC
Read cycle time
200
ns
tAA
Address access time
Output load A
100
ns
tACS
Chip select access time
Output load A
100
ns
tOE
Output enable to output valid
Output load A
100
ns
tCLZ
Chip select to output low Z
Output load B
8
ns
tOLZ
Output enable until output low Z
Output load B
0
ns
tCHZ
Output enable until output high Z
Output load B
0
45
ns
tOHZ
Output disable until output high Z
Output load B
0
45
ns
tOH
Output hold from address change
Output load A
10
ns
READ CYCLE (TA = TOPR, VCC = 3.3 V)
PARAMETER
TEST CONDITIONS
MIN
MAX
UNIT
tRC
Read cycle time
300
ns
tAA
Address access time
Output load A
150
ns
tACS
Chip select access time
Output load A
150
ns
tOE
Output enable to output valid
Output load A
150
ns
tCLZ
Chip select to output low Z
Output load B
15
ns
tOHL
Output enable until output low Z
Output load B
0
ns
tCLH
Output enable until output high Z
Output load B
0
60
ns
tOLZ
Output disable until output high Z
Output load B
0
60
ns
tOH
Output hold from address change
Output load A
18
ns


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