© 2004 Fairchild Semiconductor Corporation www.fairchildsemi.com
USB1T20 • Rev. 1.0.2 6
USB1T20 — Universal Serial Bus Transceiver
AC Electrical Characteristics D+/D- Pins, Full Speed
Over the recommended range of supply voltage and operating free air temperature unless otherwise noted.
VCC = 3.0V to 3.6V; CL = 50pF; RL = 1.5kΩ on D+ to VCC.
TA=-40 to +85°C
Symbol Parameter Conditions
Min. Typ. Max.
Units
Driver Characteristics
tR, tF Rise and Fall Time 10 and 90%, Figure 3 4 20 ns
tRFM Rise/Fall Time Matching tr / tf 90 110 %
VCRS Output Signal Crossover Voltage 1.3 2.0 V
Driver Timings
tPLH Driver Propagation Delay
(VPO,VMO/FSEO to D+D-) Figure 4 18 ns
tPHZ, tPLZ Driver Disable Delay (/OE to D+/D-) Figure 6 13 ns
tPZH, tPZL Driver Enable Delay (/OE to D+/D-) Figure 6 17 ns
Receiver Timings
tPLH 16 ns
tPHL Receiver Propagation Delay
D+/D- to RVC Figure 5 19 ns
tPLH, tPHL Single-ended Receiver Delay
(D+,D- to VP, VM) Figure 5 8 ns
AC Electrical Characteristics D+/D- Pins, Low Speed
Over the recommended range of supply voltage and operating free air temperature unless otherwise noted.
VCC = 3.0V to 3.6V; CL = 200pF to 600pF; RL = 1.5kΩ on D- to VCC.
TA=-40 to +85°C
Symbol Parameter Conditions
Min. Typ. Max.
Units
Driver Characteristics
tLR, tLF Rise and Fall Time 10 and 90%, Figure 3 75 300 ns
tRFM Rise/Fall Time Matching tr / tf 80 120 %
VCRS Output Signal Crossover Voltage 1.3 2.0 V
Driver Timings
tPLH, tPHL Driver Propagation Delay
(VPO,VMO/FSEO to D+D-) Figure 4 300 ns
tPHZ, tPLZ Driver Disable Delay (/OE to D+/D-) Figure 6 13 ns
tPZH, tPZL Driver Enable Delay (/OE to D+/D-) Figure 6 205 ns
Receiver Timings
tPLH, tPHL Receiver Propagation Delay
(D+/D- to RVC) Figure 5 18 ns
tPLH, tPHL Single-ended Receiver Delay
(D+,D- to VP, VM) Figure 5 28 ns