SN260 datasheet(12/88 Pages) STMICROELECTRONICS

12 / 88 page

Electrical characteristics

SN260

12/88

4.5

Digital I/O specifications

Table 6 contains the digital I/O specifications for the SN260. The digital I/O power (named

VDD_PADS) comes from three dedicated pins (pins 13, 19, and 24). The voltage applied to

these pins sets the I/O voltage.

Table 6.

Digital I/O specifications

Parameter

Name

Min.

Typ.

Max.

Unit

Voltage supply

VDD_PADS

2.1

3.6

Input voltage for logic 0

VIL

0.2 x VDD_PADS

Input voltage for logic 1

VIH

0.8 x VDD_PADS

VDD_PADS

Input current for logic 0

IIL

-0.5

Input current for logic 1

IIH

0.5

Input pull-up resistor value

RIPU

Input pull-down resistor value

RIPD

Output voltage for logic 0

VOL

0.18 x VDD_PADS

Output voltage for logic 1

VOH

0.82 x VDD_PADS

VDD_PADS

Output source current (standard current

pad)

IOHS

4mA

Output sink current (standard current

pad)

IOLS

4mA

Output source current (high current pad:

pins 33, 34, and 35)

IOHH

8mA

Output sink current (high current pad:

pins 33, 34, and 35)

IOLH

8mA

Total output current (for I/O pads)

IOH + IOL

Input voltage threshold for OSCA

0.2 x VDD_CORE

0.8 x VDD_PADS

Output voltage level (TX_ACTIVE)

0.18 x VDD_CORE

0.82 x VDD_CORE

Output source current (TX_ACTIVE)

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