Texas Instruments Dual/Single Socket CardBus and UntraMedia Controller PCI7621 - Manual (Page 295)

14−5
14.4 Electrical Characteristics Over Recommended Ranges of Operating Conditions
(unless otherwise noted)
14.4.1 Device
PARAMETER TEST CONDITION MIN MAX UNIT
VTH Power status threshold, CPS input† 400-k Ω resistor† 4.7 7.5 V
VO TPBIAS output voltage At rated IO current 1.665 2.015 V
II Input current (PC0−PC2 inputs) VCC = 3.6 V 5 µ A
† Measured at cable power side of resistor.
14.4.2 Driver
PARAMETER TEST CONDITION MIN MAX UNIT
VOD Differential output voltage 56 Ω , See Figure 14−1 172 265 mV
IDIFF Driver difference current, TPA+, TPA−, TPB+, TPB− Drivers enabled, speed signaling off −1.05† 1.05† mA
ISP200 Common-mode speed signaling current, TPB+, TPB− S200 speed signaling enabled −4.84‡ −2.53‡ mA
ISP400 Common-mode speed signaling current, TPB+, TPB− S400 speed signaling enabled −12.4‡ −8.10‡ mA
VOFF Off state differential voltage Drivers disabled, See Figure 14−1 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.
TPAx+
TPBx+
TPAx−
TPBx−
56 Ω
Figure 14−1. Test Load Diagram
14.4.3 Receiver
PARAMETER TEST CONDITION MIN TYP MAX UNIT
ZID Differential impedance Drivers disabled
4 7 k Ω
ZID Differential impedance Drivers disabled
4 pF
ZIC Common-mode impedance Drivers disabled
20 k Ω
ZIC Common-mode impedance Drivers disabled
24 pF
VTH−R Receiver input threshold voltage Drivers disabled −30 30 mV
VTH−CB Cable bias detect threshold, TPBx cable inputs Drivers disabled 0.6 1.0 V
VTH+ Positive arbitration comparator threshold voltage Drivers disabled 89 168 mV
VTH− Negative arbitration comparator threshold voltage Drivers disabled −168 −89 mV
VTH−SP200 Speed signal threshold TPBIAS−TPA common mode
voltage, drivers disabled 49 131 mV
VTH−SP400 Speed signal threshold
TPBIAS−TPA common mode
voltage, drivers disabled
314 396 mV