Technical Note
8/11
BU90LV048
www.rohm.com
2011.12 - Rev.
© 2011 ROHM Co., Ltd. All rights reserved.
●Switching Characteristics
V
CC
= +3.3V ±0.3V, T
opr
= -40℃ to +85℃.
Parameter Symbol Conditions Min Typ Max Units
Differential Propagation Delay High to Low t
PHLD
C
L
= 15pF
V
ID
= 200mV
(Fig.4 and Fig.5)
1.2 2.0 3.7 ns
Differential Propagation Delay Low to High t
PLHD
1.2 1.9 3.7 ns
Differential Pulse Skew |t
PHLD
– t
PLHD
| t
SKD1
0 0.1 0.4 ns
Differential Channel-to-Channel Skew;
same device
t
SKD2
0 0.15 0.5 ns
Differential Part to Part Skew t
SKD3
- - 1.0 ns
Differential Part to Part Skew t
SKD4
- - 1.5 ns
Rise Time t
TLH
- 0.5 1.5 ns
Fall Time t
THL
- 0.5 1.5 ns
Disable Time High to Z t
PHZ
R
L
= 2kΩ
C
L
= 15pF
(Fig.6 and Fig.7)
- 8 14 ns
Disable Time Low to Z t
PLZ
- 8 14 ns
Enable Time Z to High t
PZH
- 3 14 ns
Enable Time Z to Low t
PZL
- 9 14 ns
Maximum Operating Frequency f
Max
All Channels Switching 250 - - MHz
Fig.4. Receiver Propagation Delay and Transition Time Test Circuit
R
RIN+
Receiver ENABLED
Generator
50Ω
RIN-
CL
ROUT
50Ω