TLK1521

500 Mbps to 1.3 Gbps TRANSCEIVER

SLLS591A− OCTOBER 2003 − REVISED JANUARY 2004

12

POST OFFICE BOX 655303

TTL output switching characteristics over recommended operating conditions (unless otherwise

noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VOH

High-level output voltage

IOH= −1 mA, VDD = MIN

2.1

2.3

V

VOL

Low-level output voltage

IOL= 1 mA, VDD = MIN

GND

0.25

0.5

V

tr(slew)

Magnitude of RX_CLK, RXD slew rate (rising)

0.8 V to 2 V, C = 5 pF, See Figure 10

0.5

V/ns

tf(slew)

Magnitude of RX_CLK, RXD slew rate (falling)

0.8 V to 2 V, C = 5 pF, See Figure 10

0.5

V/ns

tsu

RXD setup to

↑ RX_CLK

50% voltage swing, GTX_CLK = 25 MHz,

See Figure 7

19

ns

tsu

RXD setup to

↑ RX_CLK

50% voltage swing, GTX_CLK = 65 MHz,

See Figure 7

6.7

ns

th

RXD hold to

↑ RX_CLK

50% voltage swing, GTX_CLK = 25 MHz,

See Figure 7

19

ns

th

RXD hold to

↑ RX_CLK

50% voltage swing, GTX_CLK = 65 MHz,

See Figure 7

6.7

ns

RXD(0−17)

2 V

0.8 V

2 V

0.8 V

RX_CLK

tsu

th

tf(slew)

tr(slew)

0 V

0 V

tr(slew)

tf(slew)

Figure 7. TTL Data Output Valid Levels for AC Measurements