ST40RA datasheet(44/94 Pages) STMICROELECTRONICS

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ADCS 7260755H

STMicroelectronics

44/94

ST40RA

7 Electrical specifications

7.1.2

Operating conditions

Symbol

Parameter

Min

Typical

Max

Units

Notes

VDDCORE

Core positive supply voltage

1.65

1.8

1.95

a. Either the I/O ring (VDDIO) or the core (VDDCORE) may be powered up first.

VDDIO

I/O positive supply voltage

3.0

3.3

3.6

VDDRTC

RTC positive supply voltage

1.65

1.8

1.95

VDDMM

VDD mismatch

0.3

b. VDDCORE - VDDRTC

LVREF

1.15

VDDLMI / 2

1.35

VDDLMI

3.0

2.3

3.3

2.5

3.6

2.7

c. When in SDRAM mode

d. When in DDR-SDRAM mode

VIH

LVTTL input logic 1 voltage

2.0

VDD + 0.6

VIH1

LVTTL input 1 logic voltage EMODE

pins

2.4

VDD + 0.6

VIL

LVTTL input login 0 voltage

-0.5

0.8

VIHs

SSTT_2 input login 1 voltage

LVREF + 0.18

VDDLMI + 0.3

VILs

SSTT_2 input login 0 voltage

-0.3

LVREF - 0.18

VOH

LVTTL output logic 1 voltage

2.4

e. For specified output loads see

Table 24.

VOL

LVTTL output logic 0 voltage

0.4

VOHs

SSTT_2 output logic 1 voltage

2.1

VOLs

SSTT_2 output logic 0 voltage

0.3

IIN

Input current (input pin)

+-10

0 <= VI <= VDD

IOZ

Offstate digital output current

+- 50

IWP

Input weak pull-up or pull-down

current

110

CIN

Input capacitance (input pins)

CIO

Input capacitance (bidirectional

pins)

715

Table 22: Operating conditions

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