參數(shù)資料
型號(hào): BQ4285Q
廠商: TEXAS INSTRUMENTS INC
元件分類: XO, clock
英文描述: 1 TIMER(S), REAL TIME CLOCK, PQCC28
封裝: PLASTIC, LCC-28
文件頁(yè)數(shù): 10/26頁(yè)
文件大小: 1079K
代理商: BQ4285Q
18
Jan. 1999 D
Power-Down/Power-Up Timing (TA =TOPR)
Symbol
Parameter
Minimum
Typical
Maximum
Unit
Conditions
tF
VCC slew from 4.5V to 0V
300
-
s
tR
VCC slew from 0V to 4.5V
100
-
s
tCSR
CS at VIH after power-up
20
-
200
ms
Internal write-protection
period after VCC passes VPFD
on power-up.
tWPT
Write-protect time for
external RAM
10
6
30
s
Delay after VCC slews down
past VPFD before SRAM is
write-protected.
tCER
Chip enable recovery
time
tCSR
-tCSR
ms
Time during which external
SRAM is write-protected after
VCC passes VPFD on power-up.
tCED
Chip enable propagation
delay to external SRAM
-
7
10
ns
Caution:
Negative undershoots below the absolute maximum rating of -0.3V in battery-backup mode
may affect data integrity.
Power-Down/Power-Up Timing
bq4285
相關(guān)PDF資料
PDF描述
BRN1-09P-TA1 9 CONTACT(S), MALE, D NANOMINIATURE CONNECTOR, SOLDER, PLUG
BRN1-09P-TA2 9 CONTACT(S), MALE, D NANOMINIATURE CONNECTOR, SOLDER, PLUG
BRN1-09P-TA3 9 CONTACT(S), MALE, D NANOMINIATURE CONNECTOR, SOLDER, PLUG
BRN1-09P-TA4 9 CONTACT(S), MALE, D NANOMINIATURE CONNECTOR, SOLDER, PLUG
BRN1-09P-TB1 9 CONTACT(S), MALE, D NANOMINIATURE CONNECTOR, SOLDER, PLUG
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