CDCUN1208LP datasheet(6/43 Pages) TI

6 / 43 page

CDCUN1208LP

SCAS928 – MAY 2012

www.ti.com

DIGITAL INPUT ELECTRICAL CHARACTERISTICS – OE (SCL), INSEL, ITTP, OTTP, DIVIDE

(SDA/MOSI), ERC(ADDR/CS), MODE

TA = –40°C to 85°C

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

LVCMOS INPUT

VIL1.8

Low level LVCMOS input voltage

VDD = 1.8 V

0.7

VIH1.8

High level LVCMOS input voltage

VDD = 1.8 V

1.35

VIOPEN1.8

OPEN level LVCMOS input voltage

VDD = 1.8 V

0.9

1.2

VIL2.5

Low level LVCMOS input voltage

VDD = 2.5 V

0.7

VIH2.5

High level LVCMOS input voltage

VDD = 2.5 V

1.71

VIOPEN2.5

OPEN level LVCMOS input voltage

VDD = 2.5 V

1.0

1.6

VIL3.3

Low level LVCMOS input voltage

VDD = 3.3 V

1.0

VIH3.3

High level LVCMOS input voltage

VDD = 3.3 V

2.3

VIOPEN3.3

OPEN level LVCMOS input voltage

VDD = 3.3 V

1.3

1.9

IIL

Low level LVCMOS input current

VDD = VDDmax, VILCMOS = 0 V

–120

μA

IIH

High level LVCMOS input current

VDD = VDDmax, VIHCMOS = 1.9 V

μA

LVCMOS Input capacitance

VIK

Digital input clamp voltage

VDD = 1.7V, II = –18 mA

–1.2

UNIVERSAL INPUT (IN1, IN2) CHARACTERISTICS

VDD = 1.8V, 2.5V, 3.3V, TA = –40°C to 85°C

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SINGLE-ENDED MODE

fIN1,2

Input frequency

Single ended(1)

0.008

250

MHz

VIH

Input voltage - high

250 MHz

0.7 × VDD

VDD

VIL

Input voltage - low

250 MHz

0.2 × VDD

DIFFERENTIAL MODE

fINDIFF

Input frequency

0.008

400

MHz

VDD = 2.5 V, 3.3 V

0.15

1.6

|VIN-DIFF|

Input swing

VDD = 1.8 V

0.15

ITTP = LVDS, VDD = 3.3 V

0.8

2.5

VCM

Input common mode voltage

ITTP = LVDS, VDD = 2.5 V, 1.8 V

0.8

VDD – 0.3

ITTP = HCSL

–0.15

0.75

GENERAL CHARACTERISTICS

IIH

Input current - high

VDD = 3.63 V, VIH = 3.63 V

µA

IIL

Input current - low

VDD = 3.63 V, VIL = 0 V

–30

µA

ΔV/ΔT

Input edge rate

20%–80%

0.75

V/ns

DCIN

Input duty cycle

60%

CIN

Input capacitance

3.5

(1)

When using an input in single-ended mode, ground the negative terminal (IN1N and/or IN2N) and drive the positive terminal (IN1P

and/or IN2P).

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