CDP1879 Intersil Corporation, CDP1879 Datasheet - Page 17

• Manufacturer Part Number: CDP1879
• Description: CMOS Real-Time Clock
• Manufacturer: Intersil Corporation

Dynamic Electrical Specifications
NOTE:
Write Cycle Times (See Figure 18)
Address Setup to Write
Write Pulse Width
Data Setup to Write
Address Hold after Write
Data Hold after Write
Chip Select Setup to TPA
1. Time required by a limit device to allow for the indicated function.
ADDRESS/CHIP SELECT
DATA TO CPU
PARAMETER
READ
TPA
t
t
t
t
t
t
AS
WR
DS
AH
WH
CS
FIGURE 17. READ CYCLE TIMING WAVEFORMS
at T
A
CDP1879, CDP1879C-1
-40
V
(V)
10
10
10
10
10
10
DD
5
5
5
5
5
5
o
C to +85
t
DA
t
CS
o
(NOTE 1)
C, Input t
4-120
MIN
225
110
150
150
70
65
30
80
50
30
0
0
CDP1879
t
DR
t
R
RD
, t
F
= 10ns, C
MAX
-
-
-
-
-
-
-
-
-
-
-
-
LIMITS
L
= 50 pF
t
RH
(NOTE 1)
t
MIN
225
150
150
DH
65
50
0
-
-
-
-
-
-
CDP1879C-1
MAX
-
-
-
-
-
-
-
-
-
-
-
-
UNITS
ns