MIC2550A Micrel, Inc.
M9999-031805 4 March 2005
Symbol Parameter Condition Min Typ Max Units
Transceiver DC Characteristics
I
LO
Hi-Z State Data Line Leakage 0V < V
BUS
< 3.3V, D+, D–, OE# = 1 pins only –10 +10 µA
V
DI
Differential Input Sensitivity |(D+) – (D–)|, V
IN
= 0.8V – 2.5V 0.2 V
V
CM
Differential Common-Mode Range Includes V
DI
range 0.8 2.5 V
V
SE
Single-Ended Receiver Threshold 0.8 2.0 V
Receiver Hysteresis, Note 6 200 mV
V
OL
Static Output Low, Note 5 OE# = 0, R
L
= 1.5kΩ to 3.6V 0.3 V
V
OH
Static Output High, Note 5 OE# = 0, R
L
= 15kΩ to GND 2.8 3.6 V
V
CRS
Output Signal Crossover Voltage 1.3 2.0 V
Note 6
C
IN
Transceiver Capacitance, Note 6 Pin to GND 20 pF
Z
DRV
Driver Output Resistance Steady state drive, Note 6 618Ω
Low-Speed Driver Characteristics, Note 7
t
R
Transition Rise Time C
L
= 50pF 75 ns
C
L
= 600pF 300 ns
t
F
Transition Fall Time C
L
= 50pF 75 ns
C
L
= 600pF 300 ns
t
R
/t
F
Rise and Fall Time Matching T
R
÷ T
F
80 125 %
V
CRS
Output Signal Crossover Voltage 1.3 2.0 V
Full-Speed Driver Characteristics, Note 7
t
R
Transition Rise Time C
L
= 50pF 4 20 ns
t
F
Transition Fall Time C
L
= 50pF 4 20 ns
t
R
/t
F
Rise and Fall Time Matching T
R
÷ T
F
90 111.11 %
V
CRS
Output Signal Crossover Voltage 1.3 2.0 V
Transceiver Timing, Note 7
t
PVZ
OE# to RCVR Tri-state Delay Figure 1 15 ns
t
PZD
Receiver Tri-state to Transmit Delay Figure 1 15 ns
t
PDZ
OE# to DRVR Tri-state Delay Figure 1 15 ns
t
PZV
Driver Tri-state to Receiver Delay Figure 1 15 ns
t
PLH
V+/V– to D+/D– Propagation Delay Figure 4 15 ns
t
PHL
V+/V– to D+/D– Propagation Delay Figure 4 15 ns
t
PLH
D+/D– to RCV Propagation Delay Figure 3 15 ns
t
PHL
D+/D– to RCV Propagation Delay Figure 3 15 ns
t
PLH
D+/D– to V+/D– Propagation Delay Figure 3 8 ns
t
PHL
D+/D– to V+/D– Propagation Delay Figure 3 8 ns
Note 1. Exceeding the absolute maximum rating may damage the device.
Note 2. The device is not guaranteed to function outside its operating rating.
Note 3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
Note 4. Applies to the VP, VM, RCV, OE#, SPD, and SUS pins.
Note 5. Applies to D+, D–.
Note 6. Not production tested. Guaranteed by design.
Note 7. Characterized specification(s), but not production tested.
