2 Ch. Translator, TTL to Differential TTL

SKU:

$ 1,293.75

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

Converting TTL/CMOS signals to Differential TTL Signals
Converting TTL/CMOS Signals to RS-422 Signals
High Speed Digital Communications system testing
1 PPS/IRIG-B Line Driver
Differential Line Drivers

Features:

f_MAX > 300 MHz
1.1 ns Typical t_r
50 Ω TTL/CMOS Input
1.5 V or 1.0 V Selectable Input Threshold
Complementary 50 Ω TTL Outputs
BNC Input/SMA Output Connectors
DC-Coupled I/Os
Self-contained 1.3 x 2.9 x 3.9-in. units including AC/DC Adapters

Description

The PRL-420TD is a dual channel single-ended input, differential output TTL Line Driver. Each channel has a 50 Ω TTL/CMOS compatible input and a pair of differential 50 Ω outputs for driving long lines with or without 50 Ω terminations. The input threshold voltage can be selected between 1.5 V and 1.0 V using a front panel switch. The 1.0 V threshold is useful when dealing with weak signals.

The PRL-420TD is intended for use in testing and interfacing of high speed digital communication circuits, where conversion from single-ended TTL/CMOS level signals to differential signals is often required. The differential TTL outputs can also drive RS-422 input circuits. It is an ideal building block that complements other PRL Level Translators, such as the PRL-450ND, PRL-450PD and PRL-460NPD, in systems integration applications where interconnections of signals having different logic levels are often necessary.

The PRL-420TD is a ready-to-use functional module housed in a 1.3 x 2.2 x 2.9-in. extruded aluminum enclosure and is supplied with a ±8.5 V AC/DC Adapter. BNC input and SMA output connectors are provided. A block diagram showing the equivalent input and output circuits of the PRL-420TD is shown in Fig. 1.

The PRL-420TD may be ordered without a power supply as "PRL-420TD-OEM" or with a NRTL-approved power supply (equivalent to PRL-765-1) as "PRL-420TD-NRTL".

Fig. 1, PRL-420TD Block Diagram

(0° C ≤ T_A ≤ 35° C)*

Symbol	Parameter	PRL-420TD			Unit
Symbol	Parameter	Min	Typ	Max	Unit
R_IN	Input Resistance	49.5	50.0	50.5	Ω
R_OUT	Output Resistance	49.5	50.0	50.5	Ω
V_TOSH	Input Threshold Voltage (high)	1.4	1.5	1.6	V
V_TOSL	Input Threshold Voltage (low)	0.9	1.0	1.1	V
V_IL	TTL input Low Level	-0.5	0.0	0.5	V
V_OL	TTL Output Low Level	-0.1	0.0	0.5	V
V_OH	TTL Output High Level	2.0	2.5	2.6	V
I_DC1	DC Input Current, +8.5 V		340	360	mA
I_DC2	DC Input Current, -8.5 V	-360	-340		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 ↑		2		ns
t_PHL	Propagation Delay to output ↓		2		ns
t_r/t_f⁽¹⁾	Rise/Fall Times (10%-90%)		1.2	1.4	ns
t_SKEW	Skew between any 2 outputs		150	400	ps
f_MAX	Max Clock Frequency	250	300		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.

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