PRL-454T, 1:4 TTL to LVDS Translator and Fanout Buffer

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 TTL Input to LVDS Outputs
Conversion of Single-Ended TTL Signals to Differential Signals for Driving Long Lines
Distributing Clock/Data Signals

High Speed Digital Communications Systems Testing
Satellite Telemetry/Ground Station System Integration

Features:

f_max > 400 MHz for 50 Ω input and > 250 MHz for 1 k Ω input
1 kΩ or 50 Ω TTL Input, selectable by a switch
500 ps Typical Output Rise & Fall Times
4 LVDS Outputs for Driving 50 Ohm Cables into 100 Ω Floating Loads
300 ps Channel to Channel skew, typical
SMA I/O Connectors
Operates from single +8 to +12 VDC power supply with only 150 mA max.
Self-contained 1.3 x 2.9 x 2.9-in. unit includes ±8.5 V/1.8 A AC/DC Adapter

Description

The PRL-454T-SMA is a 1:4 digital signal fanout buffer and level translator with one TTL input and four LVDS outputs.

The TTL input has a 1 kΩ or 50 Ω input impedance, selectable by a toggle switch. The 1 kΩ input setting is used most often for receiving signals from digital I/O boards. These DIO boards are generally not designed for driving 50 Ω loads. For this type of application, it is recommended that the interconnecting cable length be limited to no more than 18 inches. For applications exceeding this length, pre-buffering the TTL signal with a PRL-444, High Input Impedance Line Driver, may be required.

When switched to the 50 Ω input position, f_max can be increased beyond 400 MHz. Since very few affordable TTL clock generators can run beyond 250 MHz, we recommend that the PRL-177A-500 be used for testing the PRL-454T-SMA. The PRL-454T-SMA has a 5 V tolerant input and can be driven by the PRL-177A-500 directly.

The PRL-454T-SMA is supplied with a PRL-760E ±9.0 V/1.8 A AC/DC adapter and housed in a 1.3 x 2.9 x 2.9-in. extruded aluminum enclosure. The PRL-454T-SMA may also be ordered without the power supply as part number PRL-454T-SMA-OEM. A maximum of four units can share the included PRL-760E 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.

Fig. 1: PRL-454T Block Diagram

(0° C ≤ T_A ≤ 35° C)*

SYMBOL	PARAMETER	Min	Typ	Max	UNIT
R_IN1	Input Resistance Low Range	49.5	50.0	50.5	Ω
R_IN2	Input Resistance High Range	990	1000	1010	Ω
R_OUT	Output Resistance (current source)		N/A
V_IL	TTL Input Low Level	-0.5	0.0	0.8	V
V_IH	TTL Input High Level	1.6	2.0	5.0
V_OL	LVDS Output Low Level		1.05		V
V_OH	LVDS Output High Level		1.35		V
V_CMO	Output Common mode voltage¹		1.20		V
I_DC	DC Input Current			150	mA
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_AC2	AC/DC Adapter Input Voltage, 220	206	220	254	V
t_PLH	Propagation Delay to output ↑		2.7		ns
t_PHL	Propagation Delay to output ↓		2.7		ns
t_r/t_f	Rise/Fall Times (10%-90%)		500	700	ps
t_SKEW	Skew between any 2 outputs		300	550	ps
f_MAX1	Max Clock Frequency, R_IN= 50 Ω	350	400		MHz
f_MAX2	Max Clock Frequency, R_IN= 1k Ω	200	250		MHz
	Size	1.3 x 2.9 x 2.9			in
	Weight	5			Oz
	Shipping Weight	4			lbs

Notes:

V_CMO = (V_OH+V_OL)/2
Rise and Fall times are measured using a PRL‑425NCML LVDS receiver and a PRL-860D-SMA inline signal monitor
f_MAX is measured using the PRL-177A-500 as the driver and the PRL-425NCML as the as the receiver.

PDF Datasheet

PRL-454T, 1:4 TTL to LVDS Translator and Fanout Buffer

Applications:

Features:

Description

(0° C ≤ TA ≤ 35° C)*​

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(0° C ≤ T_A ≤ 35° C)*