參數(shù)資料
型號: DS1511W
英文描述: Y2K-Compliant Watchdog Real-Time Clocks
中文描述: 千年蟲的看門狗實(shí)時(shí)時(shí)鐘
文件頁數(shù): 6/20頁
文件大?。?/td> 265K
代理商: DS1511W
DS1501/DS1511 Y2KC Watchdog Real-Time Clocks
6 of 20
Figure 4. Burst Mode Timing Waveform
A0–A4
DQ0–DQ7
OE
,
WE
,
OR
CE
13h
PW
HIGH
PW
LOW
POWER-UP/DOWN CHARACTERISTICS
PARAMETER
CE
or
WE
at V
IH
Before Power-Fail
V
CC
Fall Time: V
PF(MAX)
to V
PF(MIN)
SYMBOL
t
PF
t
F
CONDITIONS
MIN
0
TYP
MAX
UNITS
s
300
s
V
CC
Fall Time: V
PF(MIN)
to V
SO
t
FB
10
s
V
CC
Rise Time: V
PF(MIN)
to V
PF(MAX)
t
R
0
s
V
PF
to
RST
High
t
REC
35
200
ms
(T
A
= +25°C)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Expected Data-Retention Time
(Oscillator On)
t
DR
(Note 9)
10
Years
CAPACITANCE
(T
A
= +25°C)
PARAMETER
SYMBOL
C
IN
CONDITIONS
MIN
TYP
MAX
10
UNITS
pF
Capacitance on All Input Pins
Capacitance on
IRQ
,
PWR
,
RST
, and DQ
Pins
C
IO
10
pF
AC TEST CONDITIONS
OUTPUT LOAD
INPUT PULSE
LEVELS
0V to 3.0V for 5V
operation
TIMING MEASUREMENT
REFERENCE LEVELS
Input: 1.5V
Output: 1.5V
INPUT PULSE RISE
AND FALL TIMES
(Y) 50pF + 1TTL Gate
(W) 25pF + 1 TTL Gate
5ns
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