DS17485S-5/T&R Maxim Integrated Products, DS17485S-5/T&R Datasheet - Page 4
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DS17485S-5/T&R
Manufacturer Part Number
DS17485S-5/T&R
Description
IC RTC 5V 4K NV RAM 24-SOIC
Manufacturer
Maxim Integrated Products
Type
Clock/Calendar/NVSRAMr
Datasheet
1.DS17285S-5.pdf
(31 pages)
Specifications of DS17485S-5/T&R
Memory Size
32K (4K x 8)
Time Format
HH:MM:SS (12/24 hr)
Date Format
YY-MM-DD-dd
Interface
Parallel
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
24-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Real-Time Clocks
AC ELECTRICAL CHARACTERISTICS
(V
4
Cycle Time
Pulse Width, RD or WR Low
Pulse Width, RD or WR High
Input Rise and Fall
Chip-Select Setup Time Before
RD or WR
Chip-Select Hold Time
Read-Data Hold Time
Write-Data Hold Time
Address Setup Time to ALE Fall
Address Hold Time to ALE Fall
RD or WR High Setup to ALE
Rise
Pulse Width ALE High
Delay Time ALE Low to RD Low
Output Data Delay Time from RD
Data Setup Time
IRQ Release from RD
CC
_____________________________________________________________________
= +2.7V to +3.7V, T
AD0–AD7
WRITE
PARAMETER
WR
AS
RD
CS
A
= Over the operating range, unless otherwise noted.) (Note 2)
t
t
ASD
ASD
SYMBOL
t
PW
PW
ASL
PW
t
t
t
t
t
t
t
t
t
ASED
t
DHW
DSW
t
R
t
DHR
DDR
CYC
t
AHL
ASD
ASL
IRD
PW
CH
CS
RWH
RWL
, t
ASH
ASH
F
PW
RWH
(Note 8)
t
CS
t
ASED
t
AHL
CONDITIONS
t
CYC
PW
t
DSW
RWL
MIN
360
200
150
20
10
40
10
30
40
30
20
70
0
0
TYP
Write Timing
t
t
CH
DHW
MAX
200
DC
30
90
2
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs