GS3281 datasheet(11/97 Pages) SEMTECH

11 / 97 page

GS3281

Final Data Sheet

Rev.7

PDS-061453

January 2019

11 of 97

Semtech

Proprietary & Confidential

www.semtech.com

SDO Output Common



Mode Voltage

VCMOUT

Single Ended

—

VCCO -

VSDO/2

——

DDI Input Termination

Differential

—

100

—

SDO Output Termination

Between SDO and GND

—

Input Voltage - Digital Pins

(CS, SDIN, SCLK, GPIO[0:1])

VIH

0.65*

VDD

—VDD

—

VIL

0—

0.35*

VDD

V—

Input Voltage - Digital Pins



(GPIO[2:3])

VIH

0.65*

VCC_CORE

—VCC_CORE

—

VIL

0—

0.35*

VCC_CORE

V—

Output Voltage - Digital Pins



(SDOUT, GPIO[0:1])

VOH

IOH = -5mA

VDD -

0.45

——

—

VOL

IOL = +5mA

——

0.45

—

Output Voltage - Digital Pins



(GPIO[2:3])

VOH

IOH = -5mA

VCC_CORE

-0.45

——

—

VOL

IOL = +5mA

——

0.45

—

Notes:

1. Pre-emphasis is disabled.

2. 0.94V is when trace EQ is DC coupled to upstream driver running from 1.2V supply, and 2.525V is when trace EQ is DC coupled to upstream driver

running from 2.5V supply.

3. Applies to both SDO0 and SDO1.

4. The specifications provided are per symbol, not a combined value.

5. Current listed is an increase to ICC_CORE when stated condition is true.

6. Selected clock source = VCO free running.

Table 2-2: DC Electrical Characteristics (Continued)

TA = -40°C to +85°C, unless otherwise shown.

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Notes

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