DS2251T(1995) 데이터 시트보기 (PDF) - Dallas Semiconductor -> Maxim Integrated
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DS2251T Datasheet PDF : 19 Pages
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DS2251T
EXPANDED DATA MEMORY WRITE CYCLE
27
ALE
PSEN
WR
21
15
23
25
3
4
24
PORT 0
A7–A0
(Rn OR DPL)
DATA OUT
22
PORT 2
P2.7–P2.0 OR A15–A8 FROM DPH
A7–A0
(PCL)
INSTR
IN
A15–A8 FROM PCH
AC CHARACTERISTICS (cont’d)
EXTERNAL CLOCK DRIVE
# PARAMETER
28 External Clock High Time @12 MHz
@16 MHz
29 External Clock Low Time @12 MHz
@16 MHz
30 External Clock Rise Time @12 MHz
@16 MHz
31 External Clock Fall Time @12 MHz
@16 MHz
SYMBOL
tCLKHPW
tCLKLPW
tCLKR
tCLKF
(tA = 0°C to70°C; VCC = 5V + 10%)
MIN
MAX
UNITS
20
ns
15
ns
20
ns
15
ns
20
ns
15
ns
20
ns
15
ns
121395 12/19
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