2 Ch. Translator, NECL to PECL, 2 GHz

SKU:

$ 1,236.25

Item	Description
88000102-4	Cable, triple voltage, with modular plugs, Length in ft.
88000103-4	Cable, triple voltage, with modular plug and pig tail leads, Length in ft.

Product Description
Diagrams
Applications
Specifications
Documents

Applications:

Converting Single Ended or Differential LVPECL Signals to Differential NECL Signals
High Speed Digital Communications systems Testing
High Speed SONET Clock Level Translation

Features:

fmax > 1.25 GHz
750 ps t_r
50 Ω/V_TT Input Terminations
Single Ended or Differential Inputs
Complementary NECL Outputs drive 50 Ω/-2V Terminations, AC-coupled or Floating 50 Ω Loads
DC coupled I/O's with SMA Connectors
Self-contained 1.3 x 2.9 x 2.9-in. unit including an AC/DC Adapter

Description

The PRL-460ALPND is a dual channel LVPECL to NECL Logic Level Translator module, intended for operation from DC to the GHz range. Maximum clock frequency is typically 1.5 GHz. These modules can receive either single-ended or differential input signals, to be selected by a switch.

The complementary outputs of these modules are designed for driving 50 Ω loads terminated to -2 V, and they can also drive AC coupled or floating 50 Ω loads. These high speed translator modules facilitate testing and integration of high speed digital communications circuits and systems, where conversion of signals from LVPECL to NECL logic families is often required.

The PRL-460ALPND inputs are designed to interface with LVPECL circuits operating with a +3.3 V supply. In the differential input mode, both inputs D and D are terminated into 50 Ω/V_TT, where V_TT is +1.3V for LVPECL. In this mode, either one or both inputs can accept AC-coupled signals as well. In the single-input mode, signals should be connected to the D inputs only. Inputs D are switched internally to V_BB, nominally +2 V for LVPECL, and termination resistors R_T's for the D input channels are changed to 62 Ω. A block diagram of the PRL-460ALPND is shown in Fig. 1.

The PRL-460ALPND is supplied with a ±8.5 V AC/DC Adapter and housed in a 1.3 x 2.9 x 2.9-in. extruded aluminum enclosure.

Fig. 1 PRL-460ALPND Block Diagram

(0° C ≤ T_A ≤ 35° C)*

Symbol	Parameter	PRL-460ALPND			Unit
Symbol	Parameter	Min	Typ	Max	Unit
R_in	Input Resistance	49.5	50	50.5	Ω
R_out	Output Resistance (NPN emitter with 200 Ω pulldown)		N/A		Ω
V_TT	"D" Input Termination Voltage (fixed)	1.18	1.30	1.43	V
V_T	"D" Input Termination Voltage (variable)	1.18/ 1.8	1.3/ 2.0	1.43/ 2.2	V
V_oL	Output Low Level	-1.85	-1.7	-1.55	V
V_oH	Output High Level	-1.0	-0.8	-0.7	V
V_op-p	Output Voltage Swing, f ≤ 700 MHz Output Voltage Swing, f ≤ 550 MHz		500 750		mV
I_DC	DC Input Current		+90 -120	+100 -135	mA
V_DC	DC Input Voltage	±7.5	±8.5	±12	V
V_AC	AC/DC Adapter Input Voltage	103	115	127	V
t_PLH	Propagation Delay to output ↑		1.25		ns
t_PHL	Propagation Delay to output ↓		1.25		ns
t_r/t_f	Rise/Fall Times (20% - 80%)*		750	950	ps
t_SKEW	Skew between any 2 outputs		50	120	ps
f_max	Max Clock Frequency	1.25	1.5		GHz
	Size	1.3 x 2.9 x 2.9			in.
	Weight	7			Oz

* An unused complementary output must be either terminated into 50 Ω/V_TT or AC coupled into a 50 Ω load; otherwise, output waveform distortion and rise time degradation will occur. Use the PRL-ACT-50 dual channel AC coupled 50 Ω Termination for terminating unused complementary outputs and the PRL-SC-104 DC Block or PRL-ACX-12dB AC coupled attenuator for connection of NECL signals to 50 Ω input oscilloscopes, if DC information is not needed. Otherwise, use the PRL-550NQ4X four channel NECL Terminators for the 50 Ω/V_TT termination and for connection of NECL signals to 50 Ω input oscilloscopes.

2 Ch. Translator, NECL to PECL, 2 GHz

Applications:

Features:

Description

(0° C ≤ TA ≤ 35° C)*

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(0° C ≤ T_A ≤ 35° C)*