AN2014 datasheet(35/65 Pages) STMICROELECTRONICS

Part #	AN2014

Description	How a designer can make the most of STMicroelectronics serial EEPROMs

PDF	65 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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35 / 65 page

DocID10701 Rev 10

35/65

AN2014

Hardware considerations

4.3.6

Recommended MICROWIRE EEPROM connections

Recommended MICROWIRE EEPROM connections are shown in Figure 30 and Figure 31.

Note that for both circuits:

A decoupling capacitor (10 nF min) must be placed as close as possible to the package

pins VCC and VSS.

A 50 Ohm resistor can be connected to VCC if extra filtering on VCC is needed or if an

identified latchup risk is to be minimized.

Figure 30. Recommended MICROWIRE connections - safe design

Figure 31. Recommended MICROWIRE connections - robust design

Table 8. Calculating external pull-up and pull-down resistors in MICROWIRE products

Recommended

connection

EEPROM input pins (S, C, D, W, ORG)

EEPROM output pin Q

RPD

RPD > VIH EE / IOH master

RPD > VIH master / IOH EE

RPU

RPU > (VCC −VIL EE) / IOL master

RPU > (VCC −VIL master) / IOL EE

AN2014 Datasheet(PDF) 35 Page - STMicroelectronics