PRL-444LV, 4 Channel TTL/CMOS to LVDS Level Translator and Line Driver

SKU:

$ 1,075.00

Quantity

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:

TTL to LVDS Logic Level Translation
Conversion of Single-Ended TTL Signals to Differential Signals for Driving Long Lines
Mini Modular Instrument for interfacing with High Speed Data Communications Equipment

Features:

250 MHz Typical Maximum Clock Rate
4 Single Ended Inputs with Selectable 50 Ω or 1 kΩ Termination
4 LVDS Outputs for Driving 50 Ohm or Cat 7 Cables into 100 Ω Floating Loads
SMA or RJ45 I/O Connectors
Single Supply, +7.5 VDC to +12 VDC, operation
Ready-to-Use 1.3 x 2.9 x 2.9-in. Module includes a ±8.5 V/1.4 A AC/DC Adapter

Description

The PRL-444LV is a 4 Channel TTL to LVDS translator module. The input resistance of the inputs can be selected to be either 50 Ω or 1 kΩ by a common toggle switch. The 1 kΩ inputs are desirable when interfacing with low power circuits. The four pairs of complementary outputs are designed for driving floating 100 Ω loads, normally the configuration used in LVDS input circuits. The output swing is typically 300 mV with a common mode voltage of 1.0 V.

All I/Os are DC coupled and have SMA or RJ45 connectors, as part numbers PRL-444LV-SMA and PRL-444LV-RJRJ, respectively. A block diagram showing the equivalent input and output circuits are shown in Figs. 1 and 2. Cat7 or better cabling is recommended for RJ45 models, as the double shielding improves the impedance control. See our case studies on single-ended impedance and differential impedance of standard, off-the-shelf network cabling.

The modules are housed in a 1.3 x 2.9 x 2.9-in. extruded aluminum enclosure and supplied with a ±8.5 V/±1.4 A, auto-switching AC/DC Adapter. Either model may also be ordered without the power supply by appending “-OEM” to the part number, e.g. PRL-444LV-SMA-OEM. A maximum of four units can share one PRL-760D-120/220 AC/DC adapter, using additional units of cable #88000102-4. If mounting is desired, a pair of the #35001420 mounting brackets can accommodate any two PRL modules of the same length. Please refer to the Accessories section for more detail.

A complementary product, the PRL-425QLT, performs the opposite conversion of 4 LVDS signals to 4 TTL signals, and the PRL-RJ45-SMA adapter can be used to adapt Cat7 network cabling to SMA or the reverse.

Fig. 1: PRL-444LV-SMA Block Diagram

Fig. 2: PRL-444LV-RJRJ Block Diagram

SPECIFICATIONS: (0° C ≤ T_A ≤ 35° C)*

SYMBOL	PARAMETER	Min	Typ	Max	UNIT	Comment
R_IN1	Input Resistance	49.5	50.0	50.5	Ω
R_IN2	Input Resistance	990	1000	1010	V
V_IL	TTL input Low Level	-0.5	0.0	0.5	V
V_IH	TTL input High Level	2.0	2.4	5.0	V
V_DC	DC Input Voltage	7.5	8.5	12.0	V
V_AC1	AC/DC Adapter Input Voltage, 120	103	115	127	V
V_AC1	AC/DC Adapter Input Voltage, 220	206	230	254	V
I_DC1	DC Input Current @ 50 MHz		65	85	mA
I_DC2	DC Input Current @ 250 MHz			125	mA
V_OPP	Output Differential Voltage, peak-to-peak	250	300	450	mV
V_CMO	Output Common mode voltage¹		1.0	1.2	V
t_PLH	Propagation Delay to output ↑		2	3	ns
t_PHL	Propagation Delay to output ↓		2	3	ns
t_r/t_f1	Rise/Fall Times (10%-90%)¹		1.0	1.8	ns	Note 1
f_MAX	Max Clock Frequency	200	250		MHz	Note 1
t_SKEW	Skew between any 2 outputs		300	750	ps
DTY	Duty Cycle @ 50 MHz		45/55
	Size	1.3 x 2.9 x 2.9			in.
	Weight	5			Oz
	Shipping Weight	3			lbs

¹-SMA model only. f_max and t_r/t_f for RJ45 models are pending.

While we believe these models to be accurate, no representations are made as to accuracy or suitability for any application:

PRL-444LV-SMA:

PRL-444LV, 4 Channel TTL/CMOS to LVDS Level Translator and Line Driver

Applications:

Features:

Description

SPECIFICATIONS: (0° C ≤ TA ≤ 35° C)*

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SPECIFICATIONS: (0° C ≤ T_A ≤ 35° C)*