2 Ch. TTL to LVDS Translator

SKU:

$ 1,305.25

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:

Converting TTL signals to LVDS
High Speed Digital Communications systems Testing
High Speed SONET Clock Level Translation

Features:

f_max > 300 MHz
1.1 ns Typical Output Rise & Fall Times
Switchable 1.5 V/1.0 V input threshold (TTL)
Complementary 50 Ω LVDS Outputs
BNC Input Connectors, SMA Output Connectors
Triax Output Connector Option
Two channels for CLK/DATA translation
Self-contained 1.3 x 2.9 x 3.9-in. unit includes ±8.5 V/1.8 A AC/DC Adapter

Description

The PRL-426T is a TTL-to-LVDS Logic Level Translator. The PRL-426T input is single-ended, and a toggle switch controls the input threshold (1.5 V or 1.0 V into 50 Ω). The input connectors on the PRL-426T are BNC.

The differential outputs are 50 Ω back-terminated and are designed for driving floating 100 Ω loads, normally the configuration used in LVDS input circuits. The output swing is typically 600 mV with a common mode voltage of 1.2 V. Models with the "TR" suffix, e.g. PRL-426TTR, have Triax output connectors instead of the SMA connectors. These high speed translators facilitate testing of high speed digital communications circuits where conversion of TTL clock and data signals to LVDS level signals is often required.

The PRL-426T is designed to interface with TTL circuits. In cases where the signal source cannot drive TTL voltages into 50 Ω, the input threshold switch can be used to lower the triggering voltage to 1.0 V.

Each unit is supplied with a ±8.5 V/1.8 A AC/DC Adaptor and housed in a 1.3 x 2.9 x 3.9-in. extruded aluminum enclosure. Available accessories include voltage distribution modules for mounting multiple units.

Fig. 1: PRL-426T Dual Ch. TTL to LVDS Translator, SMA Outputs

Fig. 2: PRL-426TTR Dual Ch. TTL to LVDS Translator, Triax Outputs

(0° C ≤ T_A ≤ 35° C)*

Symbol	Parameter	PRL-426T			UNIT
Symbol	Parameter	Min	Typ	Max	UNIT
R_IN	Input Resistance	49.5	50	50.5	Ω
R_OUT	Output Resistance	49.5	50	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	Output Low Level		0.9		V
V_OH	Output High Level		1.5		V
V_CMV	Common Mode Voltage¹		1.2		V
I_DC1	DC Input Current, +8.5 V		100	110	mA
I_DC1	DC Input Current, -8.5 V		-205	-215	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	Rise/Fall Times² (10%-90%)		1.00	1.25	ns
t_SKEW	Skew between any two outputs		200	500	ps
f_MAX	Maximum Clock Frequency	250	300		MHz
	Size	1.3 x 2.9 x 3.9			in.
	Weight, excluding AC adapter	7			Oz
	Shipping weight, including AC adapter	4			lb.

Notes:

(1) V_CMV = (V_OH-V_OL)/2

(2) Rise and Fall times are measured with SMA output connector units only and with ground-referenced 50 Ω loads.

(3) fmax is measured using a PRL-425N with the corresponding input connectors as the receiver. The NECL outputs of the PRL-425N are measured. f_max for the PRL-426T is currently limited by the lack of high frequency TTL drivers.

Units with the Trompeter CBBJR79 Triax ouput connectors are tested using the PRL-425NTR, Universal Differential Receiver (Triax) with Differential NECL outputs, and the Trompeter PCGOW10PCG-36 shielded twisted pair cables.

All PRL products with Triax connectors use Trompeter P/N CBBJR79, Right Angle Circuit Board Bulkhead Jack, 3-lug (Numbered page 10, document page 11 of 142). Any Trompeter 70-series Triax Cable Plug with 3 lugs (e.g. PL75-9, 3-lug) will mate with CBBJR79.

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

PRL-426T: