DS1248Y-70 Maxim Integrated Products, DS1248Y-70 Datasheet - Page 11

• Manufacturer Part Number: DS1248Y-70
• Description: Real Time Clock
• Manufacturer: Maxim Integrated Products

Specifications of DS1248Y-70

• Function: Clock, Calendar, NV Timekeeping RAM, Battery Backup
• Rtc Memory Size: 131072 B
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: Through Hole
• Rtc Bus Interface: Phantom Clock, Parallel
• Package / Case: eDIP
• Time Format: HH:MM:SS:hh
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PHANTOM CLOCK AC ELECTRICAL CHARACTERISTICS
Over the Operating Range (5V)
Read Cycle Time
CE Access Time
OE Access Time
CE to Output Low-Z
OE to Output Low-Z
CE to Output High-Z
OE to Output High-Z
Read Recovery
Write Cycle Time
Write Pulse Width
Write Recovery
Data Setup Time
Data Hold Time
CE Pulse Width
RST Pulse Width
POWER-DOWN/POWER-UP TIMING
Over the Operating Range (3.3V)
CE at V
V
V
V
V
V
CE at V
(T
Expected Data-Retention Time
Warning: Under no circumstances are negative undershoots of any amplitude allowed when device
is in battery-backup mode.
CC
PF(min)
CC
CC
PF(min)
A
= +25°C)
Slew from V
Slew from V
Slew from V
( CE at V
(CE at V
IH
IH
PARAMETER
PARAMETER
PARAMETER
before Power-Down
after Power-Up
PF
PF
PF(max)
PF(min)
PF(max)
)
)
to V
to
to
SO
SYMBOL
SYMBOL
SYMBOL
t
t
t
t
t
t
t
t
t
t
t
t
t
t
ODO
t
t
COE
t
t
t
OEE
REC
RST
WC
WR
CW
OD
WP
DH
t
RC
CO
OE
RR
t
DR
DS
PD
FB
R
F
11 of 18
MIN
MIN
MIN
300
1.5
65
10
65
55
10
30
60
65
10
10
5
5
0
0
0
TYP
TYP
TYP
MAX
MAX
MAX
2.5
55
55
25
25
UNITS
UNITS
UNITS
years
ms
s
s
s
s
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTES
NOTES
NOTES
10
5
5
3
4
4
9