CDP1854A3 Просмотр технического описания (PDF) - Intersil
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CDP1854A3 Datasheet PDF : 12 Pages
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CDP1854A/3, CDP1854AC/3
Dynamic Electrical Specifications tR, tF = 15ns, VIH = VDD, VIL = VSS, CL = 100pF, (See Figure 3)
PARAMETER
VDD
(V)
LIMITS
-55oC, +25oC
+125oC
MIN
MAX
MIN
MAX
CPU INTERFACE - WRITE TIMING - MODE 1
Pulse Width
TPB
tTT
5
125
-
165
-
10
70
-
80
-
Setup Time
RSEL to Write
tRSW
5
20
-
10
-
10
25
-
25
-
Data to Write
tDW
5
65
-
75
-
10
45
-
50
-
Hold Time
RSEL after Write
tWRS
5
-10
-
-20
-
10
5
-
5
-
Data after Write
tWD
5
95
10
55
-
105
-
-
55
-
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
TPB
(NOTE 1)
RSEL
T BUS 0-
T BUS 7
CS3, CS1
(NOTE 1)
tRSW
tTT
tWRS
tDW
tWD
RD/WR, CS2
(NOTE 1)
NOTE:
1. Write is the overlap of TPB, CS1, CS3 = 1 and CS2, RD/WR = 0.
FIGURE 3. MODE 1 CPU INTERFACE (WRITE) TIMING DIAGRAM
6
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