CDP1824 Просмотр технического описания (PDF) - Intersil
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CDP1824 Datasheet PDF : 6 Pages
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CDP1824, CDP1824C
Data Retention Specifications at TA = -40oC to +85oC; See Figure 3
TEST CONDITIONS
PARAMETER
Data Retention Voltage
Data Retention Quiescent Current
Chip Deselect to Data Retention
Time
SYMBOL
VDR
IDD
tCDR
VDR = 2.5V
VDR = 2.5V
Recovery to Normal Operation Time
tRC
VDR = 2.5V
VDD
(V)
-
-
5
10
5
10
LIMITS
CDP1824
CDP1824C
MIN
MAX
MIN
MAX
2.5
-
2.5
-
-
10
-
40
600
-
600
-
300
-
-
-
600
-
600
-
300
-
-
-
UNITS
V
µA
ns
ns
ns
ns
MA4
MA3
MA2 3
MA1 4
MA0 5
21
ADDRESS
DECODER
32 X 8-BIT
ARRAY
SENSE
AMPL
17
MWR
CS 15
I/O BUFFERS
16
MRD
VDD = 18
VSS = 9
6 7 8 10 11 12 13 14
BUS BUS BUS BUS BUS BUS BUS BUS
76543210
FIGURE 4. FUNCTIONAL DIAGRAM
CPU/ROM SYSTEM
ADDRESS
RAM SYSTEM
MA0-MA7
TPA
MRD
MWR
CPU
CDP1802
BUS0-BUS7
MA0-MA7
TPA
MRD
ROM
CE0
BUS0-BUS7
MA0-MA7
MRD
MWR
RAM
CDP1824
CS
BUS0-BUS7
DATA
FIGURE 5. CDP1824 (128 X 8) MINIMUM SYSTEM (128 X 8)
6-41
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