DS14285SN+T&R Maxim Integrated, DS14285SN+T&R Datasheet - Page 18

• Manufacturer Part Number: DS14285SN+T&R
• Description: Real Time Clock
• Manufacturer: Maxim Integrated
• Series: DS14285, DS14287r

Specifications of DS14285SN+T&R

• Rohs: yes
• Function: Clock, Calendar, NV SRAM Control
• Rtc Bus Interface: Multiplexed
• Date Format: DW
• Time Format: HH
• Rtc Memory Size: 114 B
• Supply Voltage - Max: 5.5 V
• Supply Voltage - Min: 4.5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-24

AC ELECTRICAL CHARACTERISTICS
(Over the operating range)
AC TEST CONDITIONS
Input Pulse Level: 0 to 3.0V
Input Rise/Fall Times: 5ns
Input and Output Timing Reference Levels: 1.5V
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
PARAMETER
RESET
WR
WR
SYMBOL
PW
PW
PW
t
t
t
t
t
t
t
t
t
t
t
t
t
t
ASED
R
DHW
t
RWH
IRDS
RWS
t
DHR
DDR
DSW
RWL
CYC
t
AHL
ASD
ASL
IRR
CH
CS
, t
ASH
EH
EL
F
18 of 26
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
µs
µs
µs
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES
9