TLK2501

1.5 TO 2.5 GBPS TRANSCEIVER

SLLS427D − AUGUST 2000 − REVISED JULY 2003

16

POST OFFICE BOX 655303

TTL output switching characteristics over recommended operating conditions (unless otherwise

noted)

PARAMETER

TEST CONDITIONS

MIN

NOM

MAX

UNIT

VOH

High-level output voltage

IOH = −1 mA,

VDD = MIN

2.10

2.3

V

VOL

Low-level output voltage

IOL = 1 mA,

VDD = MIN

GND

0.25

0.5

V

tr(slew)

Slew rate (rising), magnitude of

RX_CLK, RX_ER, RX_DV/LOS, RXD

0.8 V to 2 V,

C = 5 pF, See Figure 11

0.5

V/ns

tf(slew)

Slew rate (falling), magnitude of

RX_CLK, RX_ER, RX_DV/LOS, RXD

0.8 V to 2 V,

C = 5 pF, See Figure 11

0.5

V/ns

RXD, RX_DV/LOS, RX_ER

50% voltage swing,

GTX_CLK = 125 MHz

3

tsu

RXD, RX_DV/LOS, RX_ER

setup to

↑ RX_CLK

50% voltage swing,

See Figure 11

GTX_CLK = 100 MHz

4

ns

tsu

setup to

↑ RX_CLK

See Figure 11

GTX_CLK = 75 MHz

5.4

ns

RXD, RX_DV/LOS, RX_ER

50% voltage swing,

GTX_CLK = 125 MHz

3

th

RXD, RX_DV/LOS, RX_ER

hold to

↑ RX_CLK

50% voltage swing,

See Figure 11

GTX_CLK = 100 MHz

4

ns

th

hold to

↑ RX_CLK

See Figure 11

GTX_CLK = 75 MHz

5.4

ns

RXD(0−15)

2.0 V

0.8 V

2.0 V

0.8 V

RX_CLK

RX_DV, RX_ER,

tsu

th

tf(slew)

tr(slew)

0 V

2.7 V

0 V

tr(slew)

tf(slew)

2.7 V

Figure 11. TTL Data Output Valid Levels for AC Measurements