m48t86 STMicroelectronics, m48t86 Datasheet - Page 5

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m48t86

Manufacturer Part Number
m48t86
Description
5v Pc Real Time Clock
Manufacturer
STMicroelectronics
Datasheet

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List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
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Figure 17.
Figure 18.
Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
24-pin DIP connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
28-pin SOIC connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Intel bus read AC waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Intel bus write mode AC waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Motorola bus read/write mode AC waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Address map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Update period timing and UIP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Update-ended/periodic interrupt relationship . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Supply voltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
AC testing load circuit (no IRQ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
AC testing load circuit (with IRQ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Power down/up mode AC waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
PCDIP24 – 24-pin plastic DIP, battery CAPHAT, package outline . . . . . . . . . . . . . . . . . . . 28
SOH28 – 28-lead plastic small outline, 4-socket SNAPHAT, package outline . . . . . . . . . . 29
SH – 4-pin SNAPHAT housing for 48mAh battery and crystal, package outline . . . . . . . . 30
SH – 4-pin SNAPHAT housing for 120mAh battery and crystal, package outline . . . . . . . 31
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