TTSV02622 STS-24 Backplane Transceiver
Data Sheet
June 2003
(continued)
LVDS Receiver Buffer Capabilities
A disabled or unpowered LVDS receiver can withstand a driving LVDS transmitter over the full range of driver oper-
ating range, for an unlimited period of time, without being damaged. Table 16 illustrates LVDS driver dc data,
Table 14. LVDS Receiver dc Data*
Parameter
Input Voltage Range, V
IA
or V
IB
(Common-Mode Voltage)
Input Differential Threshold
(Differential-Mode Voltage)
Input Differential Hysteresis
Receiver Differential Input Impedance
Symbol
V
I
V
IDTH
V
HYST
R
IN
Conditions
|V
GPD
| < 925 mV
dc – 1 MHz
|V
GPD
| < 925 mV
800 MHz
(+V
IDTHH
) – (–V
IDTHL
)
With Build-In Termination,
Center-Tapped
Min
0
–100
—
80
Typ
1.2
—
—
100
Max
2.4
100
—
†
120
Unit
V
mV
mV
Ω
* V
DD
= 3.1 V—3.5 V, 0 °C—125 °C, slow—fast process.
† Buffer will not produce output transition when input is open-circuited.
Table 15. LVDS Receiver ac Data*
Parameter
Rise Time (20%—80%)
Fall Time (80%—20%)
* V
DD
= 3.1 V—3.5 V, 0 °C—125 °C, slow—fast process.
Symbol
t
R
t
F
Conditions
C
L
= 1.5 pF
C
L
= 1.5 pF
Min
50
50
Max
150
150
Unit
ps
ps
52
Agere Systems Inc.
AGERE [ AGERE SYSTEMS ]
