m48t86 STMicroelectronics, m48t86 Datasheet - Page 13

• Manufacturer Part Number: m48t86
• Description: 5v Pc Real Time Clock
• Manufacturer: STMicroelectronics

Table 2.
1. Valid for ambient operating temperature: T
2. See
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
RWH
DHW
t
RWS
DHR
ASW
t
PI
CYC
DSH
t
t
t
t
DAS
ASD
BUC
t
DSL
DW
CS
CH
AH
OD
UC
AS
(2)
Table 4 on page
Cycle time
Pulse width, data strobe low or R/W high
Pulse width, data strobe high or R/W low
R/W hold time
R/W setup time
Chip select setup time
Chip select hold time
READ data hold time
WRITE data hold time
Address setup time
Address hold time
Delay time, data strobe to address strobe
rise
Pulse width address strobe high
Delay time, address strobe to data strobe
rise
Output data delay time from data strobe
rise
WRITE setup time
Delay time before update cycle
Periodic interrupt time interval
Time of update cycle
AC characteristics
18.
Parameter
(1)
A
= 0 to 70°C; V
CC
= 4.5 to 5.5V (except where noted).
Min
160
80
55
10
20
10
30
35
30
0
5
0
0
0
5
–
M48T86
Typ
244
–
1
Max
25
50
–
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
µs
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