TLK2521 Datasheet, PDF (12/19 Pages) Texas Instruments – 1 to 2.5 Gbps TRANSCEIVER

TLK2521
1 to 2.5 Gbps TRANSCEIVER
SLLS574B − JULY 2003 − REVISED JANUARY 2004
TTL output switching characteristics over recommended operating conditions (unless otherwise
noted)
VOH
VOL
tr(slew)
tf(slew)
PARAMETER
High-level output voltage
Low-level output voltage
Magnitude of RX_CLK, RXD slew rate (rising)
Magnitude of RX_CLK, RXD slew rate (falling)
tsu
RXD setup to ↑ RX_CLK
th
RXD hold to ↑ RX_CLK
TEST CONDITIONS
IOH= −1 mA, VDD = MIN
IOL= 1 mA, VDD = MIN
0.8 V to 2 V, C = 5 pF, See Figure 10
0.8 V to 2 V, C = 5 pF, See Figure 10
50% voltage swing, GTX_CLK = 50 MHz,
See Figure 7
50% voltage swing, GTX_CLK = 125 MHz,
See Figure 7
50% voltage swing, GTX_CLK = 50 MHz,
See Figure 7
50% voltage swing, GTX_CLK = 125 MHz,
See Figure 7
MIN
2.1
GND
0.5
0.5
8
3
8
3
TYP MAX UNIT
2.3
V
0.25 0.5 V
V/ns
V/ns
ns
ns
ns
ns
RX_CLK
tr(slew)
2V
0.8 V
0V
tf(slew)
RXD(0−17)
2V
tf(slew)
tsu
th
tr(slew)
0.8 V
0V
Figure 7. TTL Data Output Valid Levels for AC Measurements
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