TLK2501IRCPR datasheet(17/25 Pages) TI

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TLK2501

1.5 TO 2.5 GBPS TRANSCEIVER

SLLS427D − AUGUST 2000 − REVISED JULY 2003

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

transmitter/receiver characteristics

PARAMETER

TEST CONDITIONS

MIN

NOM

MAX

UNIT

V(ODp)

Vodp = |VTXP−VTXN|,

preemphasis VOD, direct

840

1050

1260

VOD(pp_P)

Differential, peak-to-peak output voltage

with preemphasis

Rt = 50 Ω, RREF = 200 Ω, dc-coupled,

1680

2100

2520

mVp-p

VOD(d)

Vodd = |VTXP−VTXN|,

deemphasis VOD, direct

Rt = 50 Ω, RREF = 200 Ω, dc-coupled,

See Figure 12

760

950

1140

VOD(pp_d)

Differential, peak-to-peak output voltage

with deemphasis

1520

1900

2280

mVp-p

V(term)

Transmit termination voltage range

Rt = 50 Ω, dc coupled, See Figure 15

VDD

V(term)

Transmit termination voltage range

Rt = 50 Ω, ac coupled, See Figure 16

1500

VDD−VID/2

VID

Differential receiver input voltage

requirement, VID=|VRXP − V RXN|

200

V(cmr)

Receiver common mode voltage range,

(VRXP + VRXN)/2

1500

VDD−VID/2

Ilkg(R)

Receiver input leakage current

−10

µA

Receiver input capacitance

Serial data total jitter (peak-to-peak)

Differential output jitter at 2.5 Gbps,

random + deterministic, PRBS pattern

0.15

UI†

Serial data total jitter (peak-to-peak)

Differential output jitter at 1.5 Gbps,

random + deterministic, PRBS pattern

0.15

UI†

tr, tf

Differential output signal rise, fall time

(20% to 80%)

RL = 50 Ω, CL = 5 pF, See Figure 12

100

150

Jitter tolerance

Differential input jitter, random +

determinisitc, PRBS pattern at zero

crossing

0.60

UI†

td(Tx latency)

Tx latency

See Figure 3

bits

td(Rx latency) Rx latency

See Figure 5

107

bits

† UI is the time interval of one serialized bit.

V(ODd)

V(ODp)

V(term)

V(ODp)

V(ODd)

Bit

Time

Bit

Time

VOD(pp_d)

VOD(pp_p)

Figure 12. Differential and Common-Mode Output Voltage Definitions

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