AN1012

List of figures

Doc ID 6395 Rev 4

5/33

List of figures

Figure 1.

Standard ZEROPOWER, TIMEKEEPER, supervisor, and serial RTC packages. . . . . . . . . 1

Figure 2.

Four-transistor (4T) SRAM cell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 3.

(A) BR1225 discharge rate and (B) BR1632 discharge rate. . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 4.

Predicted battery storage life versus temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 5.

Block diagram of a TIMEKEEPER® device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 6.

M48T02/12 data retention lifetime vs. temperature (120 mAh, 100% battery backup). . . . 14

Figure 7.

M48T08/18 data retention lifetime vs. temperature (120 mAh, 100% battery backup). . . . 15

Figure 8.

M48T58 data retention lifetime vs. temperature (48 mAh, 100% battery backup) . . . . . . . 16

Figure 9.

M48T58 data retention lifetime vs. temperature (120 mAh, 100% battery backup) . . . . . . 16

Figure 10.

M48T35/37V/37Y data retention lifetime vs. temperature (48 mAh, 100% battery backup) 17

Figure 11.

M48T35/37V/37Y data retention lifetime vs. temperature (120 mAh, 100% battery

backup) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17