---
title: "GFT614 | 1 to 4 Line 50 Ω Driver Module"
date: 2025-01-02T07:33:20Z
modified: 2025-10-01T05:01:41Z
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status: publish
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---

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#### GFT614 | 1 to 4 Line 50 Ω Driver Module

The GFT614 module is specially designed for distribution of high frequency clock and high-speed logic signal to multiple devices via long cable. All outputs with 50 Ω load can drive 100 feet of cable at clock rate greater than 200 MHz with 2.5 V amplitude.

The channel input threshold can be set to +1 or 0 or -1 V and the input load can be selected from 50 Ω or 1 KΩ pull up by a front panel switch. So that channel input can be driven directly by TTL / CMOS logic levels or open collector or negative pulse (0 to -3 V) or AC coupled signal (± 0.5 V).

All outputs with 50 Ω load can drive 100 feet of cable at clock rate greater than 150 MHz with 2.5 V amplitude. Each output polarity can be set normal or inverted and outputs are compatible with DC or AC TTL input.

A gate input allows to disable the module by external signal.

The GFT614 is a compact module supplied with a +5 V AC/DC adapter.

##### [Features](#features-section)

##### [Specifications](#specifications-section)

##### [Tech Resources](#technical-resources-section)

##### [Downloable Resources](#downloadable-section)

##### [Price List](#pricelist-section)

#### Overview

##### Features

- Up to 150 MHz clock rate
- Drive 100 feet of cable at 150 MHz
- Four synchronized 50 Ω TTL outputs 
    - 1 ns typical output rise & fall time
    - Selectable polarity
    - 2 ps input to output RMS jitter
- One input with: 
    - Selectable threshold (+1 V / 0 V / -1 V)
    - Selectable load 50 Ω or 1 kΩ pull up
- Active low Gate input
- Operate from DC +5 V
- All input & output are BNC connectors
- Compact module: 115 X 103 x 37 mm
- Option: 4 individual 50 Ω TTL line drivers

##### Applications

- Clock distribution
- 1 to 4 splitters
- Pulse inverted
- Level translator
- Converting sinewave to square wave
- Long Line Drivers
- Tools for Lab
- Components Test equipment

#### Specifications

##### Input

**Range**

+5 V to -5 V

**Threshold Level**

+1 V or 0 V or -1 V (selectable at rear panel)

**Internal Load**

50 Ω or 1 kΩ pulled to +5 V (selectable at front panel)

**Minimum Pulse Width**

5 ns

##### Output

**Number**

4

**Output Resistance**

50 Ω

**Low Level**

0.25 V

**High Level**

2.5 V @ Load=50 Ω, 4 V @ Load > 10 kΩ

**Polarity from Input**

Normal or inverted

**Rise/Fall Times**

1 ns / 1 ns @ 100 MHz square wave

**Jitter RMS**

2 ps (input to output)

**Max Clock Frequency**

150 MHz @ cable length = 3 feet

150 MHz @ cable length = 100 feet

Skew

500 ps (TBC)

##### Gate

**Low Level**

< 0.5 V

**High Level**

2.4 V

Rate

50 MHz

##### General Specifications

**Control**

Switches to select:

- Input load
- Input threshold level
- Output polarity: normal or inverted

Power on indicator

**Inputs & Outputs**

All are BNC connectors

**Size**

W = 115, L = 103, H = 30 mm

**Mounting Flange**

included

Power V/A

+5 V / 200 mA max. 
External AC (90 -240 V) to DC (+ 5 V) adapter furnished

**Power Connector**

Jack 2.10 mm

##### Option

**GFT644 module**

4 individual 50 Ω TTL line drivers

#### Technical Resources

[ Model GFT614 Datasheet](https://www.berkeleynucleonics.com/download/20588/?tmstv=1778700935)#### Downloadable Resources

 Downloadable resources such as datasheets, firmware, software, drivers and products manuals. Alternatively, you can browse resources directly by visiting our [downloads page](/downloads).

- [Product Datasheets](/downloads#bnc-datasheets)
- [Product Firmware](/downloads#bnc-firmware)
- [Product Software and Drivers](/downloads#bnc-softwaredrivers)
- [Product Manuals](/downloads#bnc-manuals)

#### Price Lists

 [ Berkeley Nucleonics Price List 2026](https://www.berkeleynucleonics.com/download/19881/?tmstv=1778700935)


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