m48t18 STMicroelectronics, m48t18 Datasheet - Page 4
m48t18
Manufacturer Part Number
m48t18
Description
5v, 64kbit 8 Kb X 8 Timekeeper Sram
Manufacturer
STMicroelectronics
Datasheet
1.M48T18.pdf
(30 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
m48t18-100MH1
Manufacturer:
ST
Quantity:
20 000
Part Number:
m48t18-100MH1TR
Manufacturer:
ST
Quantity:
20 000
Company:
Part Number:
m48t18-100PC1
Manufacturer:
INTEL
Quantity:
101
Part Number:
m48t18-100PC1
Manufacturer:
ST
Quantity:
20 000
Company:
Part Number:
m48t18-150PC1
Manufacturer:
STMicroelectronics
Quantity:
135
Part Number:
m48t18-150PC1
Manufacturer:
ST
Quantity:
20 000
List of figures
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Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
DIP connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SOIC connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Read mode AC waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Write enable controlled, write AC waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Chip enable controlled, write AC waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Crystal accuracy across temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Clock calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Supply voltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
AC testing load circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Power down/up mode AC waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
PCDIP28 – 28-pin plastic DIP, battery CAPHAT, package outline . . . . . . . . . . . . . . . . . . . 23
SOH28 – 28-lead plastic small outline, 4-socket battery SNAPHAT, package outline . . . . 24
SH – 4-pin SNAPHAT housing for 48mAh battery & crystal, package outline . . . . . . . . . . 25
SH – 4-pin SNAPHAT housing for 120mAh battery & crystal, package outline . . . . . . . . . 26