DS1251Y-70+ Maxim Integrated Products, DS1251Y-70+ Datasheet - Page 11

• Manufacturer Part Number: DS1251Y-70+
• Description: IC NVSRAM 4MBIT 70NS 32DIP
• Manufacturer: Maxim Integrated Products

Specifications of DS1251Y-70+

• Format - Memory: RAM
• Memory Type: NVSRAM (Non-Volatile SRAM)
• Memory Size: 4M (512K x 8)
• Speed: 70ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 32-DIP Module (600 mil), 32-EDIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PHANTOM CLOCK AC ELECTRICAL CHARACTERISTICS
(T
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
(T
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
A
A
= Over the operating range.) (5V)
= Over the operating range.) (3.3V)
Slew from V
Slew from V
Slew from V
= +25°C)
(CE at V
IH
IH
(CE at V
before Power-Down
after Power-Up
PARAMETER
PARAMETER
PARAMETER
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
t
t
ODO
t
t
t
COE
OEE
REC
RST
WC
WR
CW
t
CO
OD
WP
DH
t
DR
RC
OE
RR
DS
PD
FB
R
F
11 of 21
MIN
MIN
MIN
300
10
1.5
65
10
65
55
10
30
60
65
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