DLPC3470 datasheet(20/70 Pages) TI1

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+ Vod

- Vod

Vod

Differential Output Signal

(Note Vcm is removed when the signals are viewed differentially)

|Vod|

Vcm

Vcm(ûpp)

Vcm(ûss)

DLPC3470

DLPS110 – APRIL 2018

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(1)

The resistance is dependent on the supply voltage level applied to the I/O.

(2)

An external 8-kΩ pullup or pulldown (if needed) would work for any voltage condition to correctly pull enough to override any associated

internal pullups or pulldowns.

6.7 Internal Pullup and Pulldown Characteristics

see

(1) (2)

INTERNAL PULLUP AND PULLDOWN RESISTOR CHARACTERISTICS

VCCIO

MIN

MAX

UNIT

Weak pullup resistance

3.3 V

kΩ

2.5 V

kΩ

1.8 V

148

kΩ

Weak pulldown resistance

3.3 V

kΩ

2.5 V

101

kΩ

1.8 V

167

kΩ

(1)

Definition of VCM changes:

(2)

Note that VOD is the differential voltage swing measured across a 100-Ω termination resistance connected directly between the

transmitter differential pins. |VOD| is the magnitude of this voltage swing relative to 0. Rise and fall times are defined for the differential

VOD signal as follows:

6.8 High-Speed Sub-LVDS Electrical Characteristics

over operating free-air temperature range (unless otherwise noted)

PARAMETER

MIN

NOM

MAX

UNIT

VCM

Steady-state common mode voltage

0.8

0.9

1.0

VCM (Δpp)

(1)

VCM change peak-to-peak (during switching)

VCM (Δss)

(1)

VCM change steady state

–10

|VOD|

(2)

Differential output voltage magnitude

200

VOD (Δ)

VOD change (between logic states)

–10

VOH

Single-ended output voltage high

1.00

VOL

Single-ended output voltage low

0.80

(2)

Differential output rise time

250

(2)

Differential output fall time

250

tMAX

Max switching rate

1200

Mbps

DCout

Output duty cycle

45%

50%

55%

Txterm

(1)

Internal differential termination

100

120

Txload

100-Ω differential PCB trace

(50-Ω transmission lines)

0.5

inches

DLPC3470 Datasheet(PDF) 20 Page - Texas Instruments

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