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DS1248 Datasheet(PDF) 10 Page - Dallas Semiconductor

Part # DS1248
Description  1024k NV SRAM with Phantom Clock
PDF  21 Pages
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Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS1248 Datasheet(HTML) 10 Page - Dallas Semiconductor

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DS1248/DS1248P
10 of 21
PHANTOM CLOCK AC ELECTRICAL CHARACTERISTICS
Over the operating range (5V)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS NOTES
Read Cycle Time
tRC
65
ns
CE
Access Time
tCO
55
ns
OE
Access Time
tOE
55
ns
CE
to Output Low-Z
tCOE
5ns
OE
to Output Low-Z
tOEE
5ns
CE
to Output High-Z
tOD
25
ns
5
OE
to Output High-Z
tODO
25
ns
5
Read Recovery
tRR
10
ns
Write Cycle Time
tWC
65
ns
Write Pulse Width
tWP
55
ns
3
Write Recovery
tWR
10
ns
10
Data Setup Time
tDS
30
ns
4
Data Hold Time
tDH
0ns
4
CE
Pulse Width
tCW
60
ns
RESET
Pulse Width
tRST
65
ns
POWER-DOWN/POWER-UP TIMING
Over the operating range (3.3V)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS NOTES
CE
at VIH before Power-Down
tPD
0
ms
VCC Slew from VPF(max) to
VPF(min)( CE at VPF)
tF
300
ms
VCC Slew from VPF(min) to VSO
tFB
10
ms
VCC Slew from VPF(max) to
VPF(min)( CE at VPF)
tR
0
ms
CE
at VIH after Power-Up
tREC
1.5
2.5
ms
(TA = +25°C)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS NOTES
Expected Data Retention Time
tDR
10
years
9
Warning: Under no circumstances are negative undershoots of any amplitude allowed when device is in
battery-backup mode.



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