2:16 Fanout Buffer, Univ. Diff./TTL Input, LVDS Output, Triax I/Os

SKU:

$ 8,569.80

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:

2:16 Fanout Buffer
Converting Differential NECL/LVDS/LVPECL/RS-422 or TTL Signals to LVDS
Long Line Driver/Level Translator
Reference Clock Distribution/Translation
CLK/DATA Distribution/Translation
1 PPS Distribution/IRIG-B Distribution
Telemetry and Avionics Distribution
Test and System Integration

Features:

f_max > 150 MHz for Differential Inputs
f_max > 100 MHz for TTL inputs
1.2 ns Typical Rise & Fall Times for LVDS
Channel-to-channel skew typically < 200 ps per bank
Floating 100 Ω Universal Differential Inputs Accept LVDS, LVPECL, NECL, or RS-422 Inputs
Separate TTL input (1 V minimum) Logically ORed with the Floating Differential Input
16 Complementary Outputs
Triax Connectors for LVDS/LVPECL/NECL Inputs, BNC Connectors for TTL Input
Triax Output Connectors
Self-contained 3.0H x 6.8W x 7.3L-in. unit includes ±8.5V/1.8A AC/DC Adapter

Description

The PRL-4216UL-TR is a 2:16 fanout differential line driver module. Each bank has a pair of floating 100 Ω universal differential inputs suitable for accepting LVDS, LVPECL, NECL, or RS422 signals.⁽¹⁾ Each bank also has a a pair of logically ORed, 50 Ω TTL inputs with a minimum 1.0 V triggering threshold. Because the inputs are ORed a Hi level applied to either input can be used as a gate signal. Please see the block diagrams for more details.

The 16 pairs of LVDS 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 700 mV with a common mode voltage of 1.3 V.

A PRL-4216UL-TR is equivalent in function to two of the PRL-4108UL-TR units housed in a single enclosure. Each internal PCB is independent.

The PRL-4216UL-TR high speed fanout line driver facilitates testing of high speed digital communications circuits and distribution of satellite or telemetry signals.

The floating differential input accepts differential LVDS, LVPECL, NECL, RS422, or any 75 mV minimum differential signal within a common-mode range of -2.0 V to +3.0 V. When driven by LVPECL or NECL inputs, these signals must have internal 150 Ω or 200 Ω pull down resistors, respectively (known as a "source-biased" output). The PRL-4216UL-TR differential input is compatible with all LVPECL or NECL output signals from the PRL family of products.

The TTL input has a selectable 50 Ω/1 kΩ input load and will trigger on a minimum 1.0 V threshold. The 1 kΩ is useful for interfacing with low-power circuits.

The PRL-4216UL-TR is supplied with a ±8.5 V/1.8 A AC/DC Adapter and housed in a 3.0 x 6.8 x 6.0-in. extruded aluminum enclosure. Available accessories include voltage distribution modules and mating cables.

(1) A related series, the PRL-4216NL, has a true NECL input terminated into 50 Ω/-2 V, and can accept single-ended or differential NECL signals that do not have internal pull-downs.

Fig. 1: PRL-4216UL-TR Simplified Block Diagram, One of Two Identical PCBs Shown

(0° C ≤ T_A ≤ 35° C)*

Unless otherwise specified, dynamic measurements are made with all rear-panel outputs terminated into floating 124 Ω, using 124 Ω shielded twisted pair Triax cables (Trompeter P/N PCGOW10PCG-36 or equivalent). Channel to channel skew and propagation delay measurements are made using a PRL-425NTR Differential Receiver with NECL outputs. Rise and fall time measurements are made using a Triax to SMA adapter and connecting the SMA outputs to a 50 Ω input scope.

Symbol	Parameter	Min	Typ	Max	Unit	Comments
R_T1-1	Differential Input Resistance	95	100	105	Ω
R_INC	Common Mode Input Resistance		5		kΩ
R_T2-1	Input Resistance, TTL 50 Ω	49	50	51	Ω
R_T2-2	Input Resistance, TTL 1 kΩ	0.95	1.00	1.05	kΩ
V_CMR	Input Common Mode Voltage	-2.0		3.0	V
V_IH1	TTL Input Hi Level	1.0		5.0	V	Internally limited to 3.5V
V_IL1	TTL Input Lo Level	-0.5		0.5	V
R_OUT1	Output Resistance	24.75	25	25.25	Ω	Single-ended
R_OUT2	Output Resistance	49.5	50	50.5	Ω	Differential
V_OH1	Output High Level		1.8		V	No Load
V_OH2	Output High Level		1.65		V	Terminated to 100 Ω
V_OL1	Output Low Level		0.78		V	No Load
V_OL2	Output Low Level		0.95		V	Terminated to 100 Ω
V_OD	Output Differential Voltage (V_OH2-V_OL2)		0.7			Terminated to 100 Ω
V_OCM	Output Common Mode Voltage*		1.3			Terminated to 100 Ω
V_AC1	AC Adapter Input Voltage, 120 V	108	115	127	V
V_AC2	AC Adapter Input Voltage, 220 V	216	230	254	V
I_DC1	DC Input Current, +8.5 V Supply		770		mA
I_DC2	DC Input Current, -8.5 V Supply		-1400		mA
T_PROP1	Prop. Delay to Output ↑, Diff. Input		2.5		ns
T_PROP2	Prop. Delay to Output ↑, TTL Input, 50 Ω		3		ns
T_R	Rise Time (10%-90%)		1.2	1.8	ns	See Note 1
T_F	Fall Time (10%-90%)		1.2	1.8	ns	See Note 1
T_SKEW1	Ch./Ch. skew ↔ any 2 ↑ or 2 ↓V_O in each bank		200	350	ps
T_SKEW2	Ch./Ch. skew ↔ any ↑ and ↓V_O in each bank		700	1200	ps
T_SKEW3	Ch./Ch. skew ↔ any 2 ↑ or 2 ↓V_O		400	550	ps
T_SKEW4	Ch./Ch. skew ↔ any ↑ and ↓V_O		1000	1250	ps
F_MAX1	Max Clock Frequency, Diff. Input	150	175		MHz
F_MAX2	Max Clock Frequency, TTL Input	100	125		MHz
	Size	3.0”H x 6.8”W x 7.3”L			in	Including connectors
	Weight	2			lbs	Excluding AC adapter
	Shipping weight	6			lbs	Including AC adapter

Please contact sales@pulseresearchlab.com for performance specifications on other models.

Notes:

(1) Due to lack of suitable equipment with floating differential 124 Ω input termination, t_R and t_F are measured using a 50 Ω input scope.

PDF Datasheet