Datasheet


   

SLLS423I − JUNE 2000 − REVISED MARCH 2005
17
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251−1443
electrical characteristics over recommended ranges of operating conditions (unless otherwise
noted)
driver
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
OD
Differential output voltage 56 Ω, See Figure 1 172 265 mV
I
(DIFF)
Driver difference current, TPA+, TPA−, TPB+, TPB−
Drivers enabled, speed
signaling off
−1.05
†
1.05
†
mA
I
(SP200)
Common mode speed signaling current, TPB+, TPB− S200 speed signaling enabled −4.84
‡
−2.53
‡
mA
I
(SP400)
Common mode speed signaling current, TPB+, TPB− S400 speed signaling enabled −12.4
‡
−8.1
‡
mA
V
(OFF)
Off state differential voltage Drivers disabled, See Figure 1 20 mV
†
Limits defined as algebraic sum of TPA+ and TPA− driver currents. Limits also apply to TPB+ and TPB− algebraic sum of driver currents.
‡
Limits defined as absolute limit of each of TPB+ and TPB− driver currents
receiver
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
z
id
Differential impedance
Drivers disabled
4 7 kΩ
z
id
Differential impedance Drivers disabled
4 pF
z
ic
Common-mode impedance
Drivers disabled
20 kΩ
z
ic
Common-mode impedance Drivers disabled
24 pF
V
(TH−R)
Receiver input threshold voltage Drivers disabled −30 30 mV
V
(TH−CB)
Cable bias detect threshold, TPB cable inputs Drivers disabled 0.6 1 V
V
(TH+)
Positive arbitration comparator threshold
voltage
Drivers disabled 89 168 mV
V
(TH−)
Negative arbitration comparator threshold
voltage
Drivers disabled −168 −89 mV
V
(TH−SP200)
Speed signal threshold
TPBIAS−TPA common-mode voltage,
drivers disabled
49 131 mV
V
(TH−SP400)
Speed signal threshold
TPBIAS−TPA common-mode voltage,
drivers disabled
314 396 mV