M48T212V-85MH1(2000) Просмотр технического описания (PDF) - STMicroelectronics

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производитель

M48T212V-85MH1
(Rev.:2000)

5V/3.3V TIMEKEEPER® CONTROLLER

STMicroelectronics 

M48T212Y, M48T212V

Figure 3. Hardware Hookup

A0-A18

5V/3.3V

0.1µF

1N5817 (1)

A0-A3

VCC

VCCSW

MOTOROLA

MTD20P06HDL

A0-Axx

A

VOUT

0.1µF

E

EX

W

E1CON

G

Note 2

E2CON

WDI

RSTIN1

RSTIN2

RST

DQ0-DQ7 IRQ/FT

VSS

M48T212Y/V

VCC

E

CMOS

SRAM

A0-Axx

VCC

E

CMOS

SRAM

Note: 1. See description in Power Supply Decoupling and Undershoot Protection.

2. Traces connecting E1CON and E2CON to external SRAM should be as short as possible.

AI03046

Figure 4. AC Testing Load Circuit

DEVICE

UNDER

TEST

645Ω

Table 5. AC Measurement Conditions

Input Rise and Fall Times

≤ 5ns

Input Pulse Voltages

0 to 3V

Input and Output Timing Ref. Voltages

1.5V

Note that Output Hi-Z is defined as the point where data

is no longer driven.

CL = 100pF or 5pF (1)

CL = 30 pF (2)

1.75V

CL includes JIG capacitance

Note: 1. DQ0-DQ7

2. E1CON and E2CON

4/23

AI03239

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