PRL-444RS, 4 Channel TTL/CMOS to RS422 Level Translator and Line Driver

SKU:

$ 1,236.25

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 RS422 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:

40 MHz Typical Maximum Clock Rate
4 Single Ended Inputs with Selectable 50 Ω or 1 kΩ Termination
4 RS422 Outputs for Driving 50 Ohm Cables into 124 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. or 1.3 x 2.9 x 3.9-in Module includes a ±8.5 V/1.8 A AC/DC Adapter

Description:

The PRL-444RS is a 4 Channel TTL to RS422 translator module, available with either SMA or RJ45 I/O connectors.

The input resistance of the PRL-444RS 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 124 Ω loads, normally the configuration used in RS422 input circuits. The output swing is typically 1.40 V with a common mode voltage of 1.5 V.

All I/Os are DC coupled. A block diagram showing the equivalent input and output circuits of the PRL-444RS-SMA is shown in Fig. 1.

The PRL-444RS-SMA is housed in a 1.3 x 2.9 x 2.9-in. extruded aluminum enclosure with SMA I/Os, while the The PRL-444RS-RJRJ is housed in a 1.3 x 2.9 x 3.9-in. enclosure with RJ45 I/Os. Both are supplied with a ±9.0 V/±1.7 A AC/DC Adapter. A future model is planned with SMA inputs and RJ45 outputs (PRL-444RS-SRJ), although no availability date is guaranteed at this time.

The PRL-444RS may also be ordered without the power supply as by appending "-OEM," e.g. PRL-444RS-SMA-OEM. A maximum of four units can share the included 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.

A complementary product, the PRL-425QRT, performs the opposite conversion of 4 RS422 signals to 4 TTL signals.

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

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

PRELIMINARY SPECIFICATIONS: (0° C ≤ T_A ≤ 35° C)*

SYMBOL	PARAMETER	Min	Typ	Max	UNIT
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	103	115	254	V
I_DC1	DC Input Current @ 20 MHz	194	220	246	mA
I_DC2	DC Input Current @ 40 MHz			290	mA
V_OPP	Output Differential Voltage, peak-to-peak		1.40		V
V_CMO	Output Common mode voltage¹	1.48	1.50	1.52	V
t_PLH	Propagation Delay to output ↑		TBD		ns
t_PHL	Propagation Delay to output ↓		TBD		ns
t_r/t_f1	Rise/Fall Times (10%-90%)¹	1.4	2.0	2.6	ns
f_MAX	Max Clock Frequency	40	44		MHz
t_SKEW	Skew between any 2 rising edges		TBD		ps
t_SKEW	Skew between any 2 rising/falling edges		250		ps
DTY	Duty Cycle @ 40 MHz		45/55
	Size	1.3 x 2.9 x 2.9			in.
	Weight	5			Oz
	Shipping Weight	4			lbs

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

PRL-444RS-SMA:

PRL-444RS, 4 Channel TTL/CMOS to RS422 Level Translator and Line Driver

Applications:

Features:

Description:

PRELIMINARY SPECIFICATIONS: (0° C ≤ TA ≤ 35° C)*

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PRELIMINARY SPECIFICATIONS: (0° C ≤ T_A ≤ 35° C)*