1:4/1:2 TTL Complementary Fanout Line Driver

SKU:

$ 1,144.25

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/CMOS Clock Distribution
1:4 Fanout Line Drivers
Single-ended to Differential Conversion
1 PPS Distribution/IRIG-B Distribution
High Speed Digital Communications System Testing
Mini-Modular Instrument

Features:

f_max > 100 MHz
Drives 100 ft of cable @ 80 MHz
2 ns Typical Output Rise & Fall Times
TTL Compatible 50 Ω or 1 kΩ Input
Four in-phase 50 Ω TTL Outputs
Two invertible outputs for differential conversion
BNC or SMA I/O Connectors
DC Coupled I/O's
Self-contained 1.3 x 2.9 x 2.9-in unit includes an AC/DC Adapter

Description

The PRL-414C is a 1:4 fanout 50 Ω TTL Line Driver. It is intended for distribution of high-speed clock and logic signals to multiple loads via long lines. The 50 Ω back-terminated outputs can drive long lines with or without 50 Ω load terminations; With 50 Ω load terminations, however, all outputs of the PRL-414C can drive 100 ft of 50 Ω cables at clock rates greater than 80 MHz.

The inner two outputs of the PRL-414C can be inverted via a toggle switch to create two differential output channels that are compatible with many differential receivers, including most RS-422 receivers and our own PRL-425 series.

In 1:4 output mode the performance of the PRL-414C is generally similar to that of the PRL-414B, upon which it is based.

The input resistance of the PRL-414C can be selected to be either 50 Ω or 1 kΩ by a switch. The 1 kΩ-input is desirable when interfacing with low power circuits. All I/O’s are DC coupled and have BNC or SMA connectors.

The PRL-414C is housed in a 1.3 x 2.9 x 2.9-in. extruded aluminum enclosure and is supplied with a ±8.5 V/± 1.8 A AC/DC Adapter. A maximum of four units can share a single AC/DC adapter using the PRL-730 voltage distribution module. If mounting is needed, a pair of the #35001420 mounting brackets can accommodate any two PRL modules of the same length.

A block diagram showing the equivalent input and output circuits of the PRL-414C is shown in Fig. 1.

Fig. 1, PRL-414C Block Diagram

Sample Applications and Related Products for PRL-414B

Crystal Clock Sources

PRL-171, Fanout Crystal Clock Source
PRL-172, Four-Phase Crystal Clock Source (f, f/2, f/4, f/8)
PRL-173, Two-Phase Crystal Clock Source (f, f/5)

RF Switches & Scanners

PRL-852A, 2 GHz A/B Switch

Frequency Dividers

PRL-220A, Four Phase Frequency Divider (f/2, f/4, f/8, f/16)
PRL-240A, Two Phase Frequency Divider (f/2, f/10)

Comparators/Sinewave Convertors

PRL-350TTL Dual Channel Output Comparators

Logic Level Translators

PRL-420ND Dual Channel TTL to ECL Translator
PRL-420PD Dual Channel TTL to PECL Translator
PRL-420TD Dual Channel Differential TTL Line Driver (converts single-ended TTL to differential TTL)
PRL-450ND Dual Channel ECL to TTL Translators
PRL-450PD Dual Channel PECL to TTL Translators

PRL-470 High Speed Line Driver and Level Translator

Accessories

Mounting Brackets
Extra AC/DC Adapters (one included with unit)
Voltage Distribution Modules, for sharing AC adapters among several modules
Cables

SPECIFICATIONS (0° C ≤ T_A ≤ 35° C)*

Symbol	Parameter	Min	Typ	Max	Unit	Comments
R_{IN LO}	Input Resistance Low Range	49.5	50	50.5	Ω
R_{IN HI}	Input Resistance High Range	990	1000	1010	Ω
R_OUT	Output Resistance		50		Ω
V_IL	TTL Input Low Level	-0.5	0	0.5	V
V_IH	TTL Input High Level	2.0	2.4	5.0	V
V_OL	TTL Output Low Level	0	0.25	0.5	V	R_L=50 Ω
V_OL	TTL Output Low Level	0	0.25	0.5	V	R_L=50 Ω
V_OH1	TTL Output High Level	2.2	2.5		V	R_L=50 Ω @ DC
V_OH2	TTL Output High Level	4.4	5		V	R_L=1 MΩ @ DC
I_DC1	TTL Output High Level		280	350	mA	f ≤ 100 MHz
I_DC2	DC Input Currents		220	250	mA	f =50 MHz sq. wave⁽¹⁾
V_DC	DC Input Voltages	7.5	8.5	12	V
V_AC	AC/DC Adapter Input Voltage	103	115	127	V
T_PLH	Propagation Delay to output ↑		10	12	ns
T_PHL	Propagation Delay to output ↓		8	12	ns
t_r	Rise Time (10%-90%)		2.2	3	ns	f =50 MHz sq. wave
t_f	Fall Time (10%-90%)		1.8	3	ns	f =50 MHz sq. wave
T_SKEW	Skew between any 2 outputs		500	1500	ps	1:4 mode, f =50 MHz sq. wave
F_MAX1	Max. Clock Frequency⁽²⁾		100	120	MHz	1:4 mode, RG58C/U Cable length =3 ft
F_MAX2	Max. Clock Frequency⁽³⁾		80			1:4 mode, RG58C/U Cable length =100 ft
F_MAX3	Max. Clock Frequency		TBD			1:2 Differential Mode
P_WMIN	Min. Pulse Width		4		ns	↑ Input
P_WMIN	Min. Pulse Width		6		ns	↓ Input
	Size	1.3 x 2.9 x 2.9			in
	Weight	5			Oz	Excluding AC adapter
	Shipping Weight	4			lb	Including AC adapter

Unless otherwise specified, dynamic measurements are made with all outputs terminated into 50 Ω.

Notes:

(1) For sharing a single PRL-760B, ±8.5 V ±1.4 A AC/DC adapter, the total current should not exceed 1.4 A.

(2) f_MAX should not exceed 120 MHz; otherwise, damage of the unit due to overheating may result.

(3) f_MAX2 is measured by connecting a second PRL-414B at the end of the 100 ft. cable.

PDF Datasheet