(0° C ≤ TA ≤ 35° C)*
Symbol |
Parameter |
PRL-420ND |
Unit |
Min |
Typ |
Max |
Rin
|
Input Resistance |
49.5 |
50 |
50.5 |
Ω |
Rout
|
Output Resistance |
NPN emitter |
Ω |
VTOSH
|
Input Threshold Voltage (High) |
1.4 |
1.5 |
1.6 |
V |
VTOSL
|
Input Threshold Voltage (Low) |
0.9 |
1.0 |
1.1 |
V |
VOL
|
Output Low Level |
-1.85 |
-1.70 |
-1.55 |
V |
VOH
|
Output High Level |
-1.0 |
-0.8 |
-0.7 |
V |
IDC1
|
DC Input Current, +8.5 V |
|
35 |
45 |
mA |
IDC2
|
DC Input Current, -8.5 V |
|
-132 |
-145 |
mA |
VDC
|
DC Input Voltage |
±7.5 |
±8.5 |
±12 |
V |
VAC
|
AC/DC Adapter Input Voltage |
103 |
115 |
127 |
V |
tPLH
|
Propagation Delay to output ↑ |
|
1.5 |
|
ns |
tPHL
|
Propagation Delay to output ↓ |
|
1.5 |
|
ns |
tr/tf(1)
|
Rise/Fall Times (20%-80%) |
|
750 |
850 |
ps |
tSKEW
|
Skew: VO↑↔VO↓ |
|
200 |
500 |
ps |
tSKEW
|
Skew: VO1↑↔ VO2↑ |
|
200 |
500 |
ps |
fMAX(2) VTOSH
|
Max Clock Frequency Input Threshold Voltage (High) |
200 |
300 |
|
MHz |
fMAX(2) VTOSL
|
Max Clock Frequency Input Threshold Voltage (Low) |
300 |
400 |
|
MHz |
|
Size |
1.3 x 2.9 x 3.9 |
in. |
|
Weight, excl. AC adapter |
7 |
Oz |
|
Shipping weight, incl. AC adapter |
4 |
lb. |
*Unless otherwise specified, dynamic measurements are made with all outputs terminated into 50 Ω /-2 V for PRL-420ND.
Notes:
The output rise and fall times are measured with with all inputs terminated into 50 Ω/VTT. For best performance all outputs should be terminated into 50 Ω/VTT or else AC- coupled into 50 Ω loads. If a single output is used, its complement must be terminated; otherwise output waveform distortion will occur. If one pair of complementary outputs is used, the other complementary pair may remain unterminated. Use the PRL-550NQ4X, four channel NECL Terminator, for the 50 Ω/VTT termination and for connection of NECL signals to 50 Ω input oscilloscopes. The PRL-ACT-50, Dual Channel AC-Coupled 50 Ω Terminator, may also be used to provide the 50 Ω/VTT termination. If preservation of DC levels is not required, then the PRL-SC-104, 0.1 µf DC block or a 12 dB AC-coupled attenuator may be used to connect the PECL outputs to 50 Ω input instruments.
(2). fMAX for the PRL-420ND is measured by connecting its inputs to the PRL-450ND, NECL to TTL Logic Level Translator, and its outputs to the ÷2 differential inputs of the PRL-255N NECL frequency divider. The outputs of the PRL- 255N are then measured using the PRL-550NQ4X, four channel NECL Terminator, connected to a 50 Ω input sampling 'scope.