DS14285-DS14287 DALLAS [Dallas Semiconductor], DS14285-DS14287 Datasheet - Page 18

• Manufacturer Part Number: DS14285-DS14287
• Description: Real Time Clock with NV RAM Control
• Manufacturer: DALLAS [Dallas Semiconductor]

AC ELECTRICAL CHARACTERISTICS
AC TEST CONDITIONS
Input Pulse Level: 0 to 3.0V
Input Rise/Fall Times: 5 ns
Input and Output Timing Reference Levels: 1.5V
OUTPUT LOAD Figure 5
PARAMETER
Cycle
Pulse Width, DS/E Low or RD/
High
Pulse Width, DS/E Low or RD/
Low
Input Rise and Fall Time
R/
R/
Chip Select Setup Time Before DS,
Chip Select Hold Time
Read Data Hold Time
Write Data Hold Time
Muxed Address Valid Time to AS/ALE
Fall
Muxed Address Hold Time
Delay Time DS/E to AS/ALE Rise
Pulse Width AS/ALE High
Delay Time, AS/ALE to DS/E Rise
Output Data Delay Time From DS/E or
Data Setup Time
Reset Pulse Width
RD
IRQ
IRQ
WR
W
W
, or
Release from DS
Release from
Hold Time
Setup Time Before DS/E
RD
RESET
WR
WR
SYMBOL
PW
PW
PW
t
t
t
t
t
t
t
t
t
t
t
t
t
t
ASED
t
R
DHW
RWH
t
DSW
RWL
IRDS
CYC
RWS
t
DHR
DDR
AHL
ASD
ASL
IRR
CH
CS
, t
ASH
EH
EL
F
18 of 25
Over the operating range
MIN
225
115
80
10
10
20
10
30
10
20
60
35
10
60
0
0
5
TYP
MAX
DC
30
50
75
2
2
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
s
s
s
DS14285/DS14287
NOTES
9