Datasheet

TLK3101
2.5 Gbps to 3.125 Gbps TRANSCEIVER
SCAS649B − AUGUST 2000 − REVISED JANUARY 2008
16
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TTL input electrical characteristics over recommended operating free-air temperature range
(unless otherwise noted)
TTL signals: TXD0 ..TXD15, GTX_CLK, LOOPEN, LCKREFN, PRBS_PASS
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
IH
High-level input voltage See Figure 10 1.7 3.6 V
V
IL
Low-level input voltage See Figure 10 0.80 V
I
IH
Input high current V
DD
= MAX, V
IN
= 2 V 40 µV
I
IL
Input low current V
DD
= MAX, V
IN
= 0.4 V −40 µV
C
I
0.8 V to 2 V 4 pF
t
r
Rise time, GTX_CLK, TX_EN, TX_ER, TXD 0.8 V to 2 V, C = 5 pF, See Figure 10 1 ns
t
f
Fall time, GTX_CLK, TX_EN, TX_ER, TXD 2 V to 0.8 V, C = 5 pF, See Figure 10 1 ns
t
su
TXD, TX_EN, TX_ER setup to ↑ GTX_CLK See Figure 10 1.5 ns
t
h
TXD, TX_EN, TX_ER hold to ↑ GTX_CLK See Figure 10 0.4 ns
TXD(0−15)
2.0 V
0.8 V
2.0 V
0.8 V
GTX_CLK
TX_ER, TX_EN,
t
su
t
h
t
f
t
r
0 V
3.6 V
0 V
3.6 V
t
r
t
f
Figure 10. TTL Data Input Valid Levels for AC Measurements