CDP1879 Intersil Corporation, CDP1879 Datasheet - Page 16

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

Dynamic Electrical Specifications
NOTE:
Read Cycle Times (See Figure 17)
Data Access from Address
Read Pulse Width
Data Access from Read
Address Hold after Read
Output Hold after Read
Chip Select Setup to TPA
1. Time required by a limit device to allow for the indicated function.
FIGURE 15. CDP1800 SERIES INPUT/OUTPUT MAPPING TIMING WAVEFORMS WITH OUTPUT INSTRUCTION
FIGURE 16. CDP1800 SERIES INPUT/OUTPUT MAPPING TIMING WAVEFORMS WITH INPUT INSTRUCTION
PARAMETER
REAL-TIME CLOCK
TO REAL-TIME CLOCK
DATA FROM MEMORY
TO MEMORY
DATA FROM
TPB/WR
N LINES
t
t
t
t
t
t
DA
RD
DR
RH
DH
CS
TPA
RD
N LINES
TPB/WR
at T
TPA
A
RD
CDP1879, CDP1879C-1
-40
V
(V)
10
10
10
10
10
10
DD
5
5
5
5
5
5
o
C to +85
o
(NOTE 1)
OUTPUT DRIVERS ENABLED
C
4-119
,
MIN
270
160
VALID DATA
50
40
50
30
Input t
0
0
-
-
-
-
CDP1879
VALID DATA
R
, t
F
= 10ns, C
MAX
400
190
375
170
230
130
-
-
-
-
-
-
LIMITS
L
OUTPUT DRIVERS
DISABLED
= 50pF
DATA LATCHED
(NOTE 1)
MIN
270
50
50
0
-
-
-
-
-
-
-
-
CDP1879C-1
MAX
400
375
230
-
-
-
-
-
-
-
-
-
UNITS
ns