Y1142A - Agilent / Hewlett-Packard

Agilent L4450A

64-Bit Digital I/O with

Memory and Counter

Data Sheet

• LXI compliance includes

built-in Ethernet connectivity

• Fully-featured graphical

Web interface

• 64 bi-directional digital

I/O bits with programmable

polarity

• Variable thresholds from

0 V to 5 V

• Handshaking protocols

• Source/sink current

up to 24 mA

• 128 kbytes pattern memory

• Two 10 MHz counter channels

• 20 MHz divide-by-n clock

• Software drivers for most

common programming

environments

64-bit Digital I/O offers high-

performance digital I/O wherever

your application needs it

The Agilent L4450A is a

high-speed 64-bit digital I/O

instrument that is LXI Class C

compliant. With its small size

and Ethernet connectivity, the

Digital I/O can be placed wher-

ever your application needs it.

The Agilent L4450A has 64

bi-directional lines configured

as eight 8-bit channels. Each

8-bit channel has programma-

ble polarity and thresholds

up to 5 V. The 128 k of memory

is useful for simulating and

capturing digital patterns up

to 10 MHz. The configurable

handshaking protocols can

be used for a wide variety of

applications.

In addition, the two counter

channels can be used to count

events, frequency, period, duty

cycle, pulse width and totalize.

Using this LXI instrument, you’ll

get all the benefits of an Ethernet

connection, instrument Web

server, standard software drivers

and more. The LXI standard is

supported by multiple vendors,

enabling lower cost of test with

accelerated test integration and

development.

Digital inputs and outputs

for your most complicated

digital applications

The L4450A can be used to

simulate or detect digital

patterns. It has eight 8-bit

digital I/O channels with

handshaking, pattern memory,

two 10 MHz counters with gate

functions, and a programmable

clock output.

Digital input/output

The digital I/O bits are

organized into two banks of

32-bits. The I/O bits can be

configured and programmed

as inputs or outputs in 8-bit

channels. The digital outputs

can be configured as active

drive or open drain outputs

with a user supplied 10 kΩ

pull up. User supplied pull-up

resistors for up to 5 V outputs

are also acceptable. The digital

inputs have programmable

thresholds up to 5 V for com-

patibility with most digital

logic standards. The on-board

pattern memory can be used

to select and output digital

stimulus or bit stream patterns,

or to capture external digital

data. Each bank has indepen-

dent memory and directional

control so that one bank can

output data while another

captures data. The memory

can be divided up to 64 kbytes

per 8-bit channel.

The memory can be allocated

as follows:

The digital channels also have:

• Variable active high drive

output from 1.65 V to 5 V

or open drain

• Variable input thresholds

from 0 V to 5 V

• Configurable handshaking

protocols including

synchronous and strobe

• Programmable polarity

• Source or sink up to 24 mA

• Internal alarming for

maskable pattern match

• 1 hardware pattern

interrupt per bank

External trigger capabilities

make it easy for you to time

and synchronize measurements

and other events. This can help

you determine when to begin

or end an acquisition.

Default Memory on Memory on

Configuration Channels 1 & 2 Channel 1

Channel 1/5 32 kbytes 64 kbytes 64 kbytes

(Bits 7:0)

(Bits 39:32)

Channel 2/6 32 kbytes 64 kbytes

(Bits 15:8)

(Bits 47:40)

Channel 3/7 32 kbytes

(Bits 23:16)

(Bits 55:48)

Channel 4/8 32 kbytes

(Bits 31:24)

(Bits 63:56)

Frequency counter and totalizer

The two channels can be

used to count digital events,

frequency, period, duty cycle,

pulse width and totalize. The

counter/totalizer also includes:

• Programmable gate

functionality

• Programmable input

thresholds levels 0 V to 3 V

System connections you can trust

The L4450A comes with 2 heavy

duty 78-pin Dsub connectors

that allow for simple, reliable

connection options. Each

connector uses 30 micro-inches

of gold to ensure a repeatable,

accurate measurement.

Flexible connection options

include:

• Detachable terminal blocks

with strain relief

• Low-cost, standard 78-pin

Dsub connector kits

and cables

• Mass interconnect solutions

Ethernet connectivity enables sim-

ple connection to the network and

remote access to measurements

The Ethernet interface offers

high-speed connections that

allow for remote access and

control. You can set up a private

network to filter out unwanted

LAN traffic and speed up the

I/O throughput, or take advan-

tage of the remote capabilities

and distribute your tests world-

wide. Monitor, troubleshoot, or

debug your application remotely.

Ethernet communication also

can be used with the support

of LAN sockets connections.

The optional GPIB interface

has many years of proven

reliability and can be used for

easy integration into existing

applications.

The L4450A ships with the

Agilent E2094N I/O Libraries

Suite making it easy for you

to configure and integrate

instruments into your system—

even if your system includes

instruments from multiple

vendors.

Figure 1. L4450A 64-bit digital I/O with counter

Fully-featured graphical web

interface makes it easy to set-up

and troubleshoot your tests from

anywhere in the world

The built-in Web browser inter-

face provides remote access

and control of the instrument

via a Java-enabled browser

such as Internet Explorer.

Using the Web interface, you

can set up, troubleshoot, and

maintain your instrument

from remote locations.

• View and modify

instrument setup

• Configure I/O channels,

patterns and alarms

• Read and write I/O channels

• Load and step digital

patterns

• Define handshaking

and memory allocation

• View error queue

• Get status reports,

current configuration,

firmware revisions,

and more

Additionally, since the Web

server is built into the instru-

ment, you can access it on any

operating system that supports

the Web browser without having

to install any special software.

Password protection and LAN

lockout are also provided to

limit access for additional

security.

Software for most popular

programming environments

Full support for standard

programming environments

ensures compatibility and

efficiency. You can use direct

I/O with the software you

already have and know, or use

standard IVI and LabVIEWTM

software drivers that provide

compatibility with the most

popular development

environments:

• Agilent T&M Toolkit for

Microsoft Visual Studio®.NET

and Agilent VEE Pro

• National Instruments

LabVIEW, LabWindows/CVI,

TestStand, and Switch

Manager

• Microsoft C/C++® and

Visual Basic®

Figure 2. The Web interface makes it easy to set up, troubleshoot and maintain

your test remotely

High-performance digital I/O wherever your application needs it

Power

button

Status LEDs

External trigger to

synchronize events

Easy connection options

with terminal blocks,

standard 78-pin cables

or connector kits

Optional GPIB Built-in Ethernet

Specifications and Characteristics

Digital input/output characteristics

Eight 8-bit channels: 8 bits wide,

input or output, non-isolated Vin 0 V – 5 V1

Vout 1.65 V – 5 V 1,2

Iout (max) 24 mA2

Frequency (max) 10 MHz3

ILoad (max) 400 mA

tr + tf (typ) 6 ns5

Handshake lines

Vin 0 – 5 V4

Vout 1.65 – 5 V2,4

I out (max) 24 mA2

Frequency (max) 10 MHz

Counter function characteristics

Maximum freq 10 MHz (max) 50% duty cycle

Vin 0 V – 5 V

Totalizer function characteristics

Maximum count 2^32 – 1 (4,294,967,296)

Max input freq 10 MHz (max), rising or falling edge programmable

Vin 0 V – 5 V

Gate input 0 V – 5 V

System clock generator characteristics

Frequency 20 MHz – 10 Hz configurable divide-by-n 24-bits,

programmable on/off

Vout 1.65 V – 5 V2

Accuracy 100 ppm

1Configurable by 8-bit channel

2Lower current drive at lower voltages

3From memory with handshaking

4Configurable by bank

55 V, 50 pF load

Product Specifications

Data out of memory to LAN or GPIB

(data transfer rate with 1000 channel blocks) GPIB LAN (w/ VXI 11)

rds/s rds/s

Readings 2560 3542

readings with timestamp 1304 1826

readings with all

format options ON 980 1361

Scan triggering

Source Interval, external, software, or on monitor channel alarm

Scan count 1 to 50,000 or continuous

Scan interval 0 to 99 hours; 1 ms step size

Channel delay 0 to 60 seconds per channel; 1 ms step size

External trig delay <2 ms. With monitor on <200 ms

External trig jitter <2 ms

Alarms

Digital inputs digital in maskable pattern match or state change

frequency and totalize: Hi limit only

Alarm on channel Alarm evaluated each reading

Alarm outputs 2 TTL compatible

Selectable TTL logic Hi or Lo on fail

Latency 5 ms (typical)

Memory

Type Volatile

Size 128 kbytes for digital patterns

States 5 instrument states with user label in non-volatile memory

General specifications

Power supply Universal 100 V to 240 V ±10%

Power line frequency 50 Hz to 60 Hz ±10% automatically sensed

Power consumption 15 VA

Operating Environment Full accuracy for 0°C to 55°C

Full accuracy to 80% R.H. at 40 °C

Storage environment -40°C to 70°C

Dimensions (H x W x L) 40.9 x 212.3 x 379.3 mm

1.61 x 8.36 x 14.93 in

Weight 3.7 kg, 8.2 lbs

Safety conforms to CSA, UL/IEC/EN 61010-1

EMC conforms to IEC/EN 61326-1, CISPR 11

Warranty 1 year

Product Specifications (continued)

Software

Agilent connectivity Agilent I/O Libraries Suite 14 or greater (E2094N)

software included

Minimum system requirements

PC hardware Intel Pentium 100 MHz, 64 Mbyte RAM, 210 Mbyte disk space

Display 800x600, 256 colors, CD-ROM drive

Operating system1Windows®98 SE/NT/2000/XP

Computer interfaces

Standard LAN 10BaseT/100BaseTx

Optional IEEE 488.2 GPIB

Software driver support for programming languages

Software drivers IVI-C and IVI-COM for Windows NT®/2000/XP

LabVIEW

Compatible with programming tools and environments

Agilent VEE Pro

T&M Toolkit

(reqs Visual Studio.NET)

National Instruments TestStand

Measurement Studio

LabWindows/CVI

LabVIEW

Switch Executive

Microsoft Visual Studio.NET®

C/C++

Visual Basic 6®

1Load I/O Libraries Version M for Windows NT support or version 14.0 for Windows 98 SE support

Product Specifications (continued)

Ordering information

L4450A 64-bit Digital I/O

with memory and counter

Includes User’s guide on CD,

power cord, and Quick Start

package

Option -GPIB

Adds GPIB interface

Option 0B0

Deletes printed manual set,

full documentation included

on CD ROM

Option ABA

English printed manual set

Connection Options

Select terminal block for

discrete wiring, cables or

connector kits. Cables and

connector kits require 2 per

instrument.

34950T

Terminal block for

34950A and L4450A

64-bit Digital I/O

Y1137A

1.5 m 78-pin Dsub,

M/F twisted pair with

outer shield cable – 300 V

Y1138A

3 m 78-pin Dsub, M/F

twisted pair with outer

shield cable – 300 V

Y1142A

Solder cup connector kit

with male 78-pin Dsub

Other accessories

Y1160A

Rack mount kit for

L4400 series instruments-

racks 2 instruments side-by-side

on sliding tray

For additional information

please visit:

http://www.agilent.com/find/L4450A

Related Agilent literature

Data Sheets

5988-6302EN

Agilent VEE Pro

5989-1441EN

Agilent W1140A-TKT

T&M Toolkit 2.0 with

Test Automation

5989-1439EN

Agilent E2094N

I/O Libraries Suite 14

www.agilent.com

For more information on Agilent

Technologies’ products, applications

or services, please contact your local

Agilent office. The complete list is

available at:

www.agilent.com/find/contactus

Phone or Fax

United States:

(tel) 800 829 4444

(fax) 800 829 4433

Canada:

(tel) 877 894 4414

(fax) 800 746 4866

China:

(tel) 800 810 0189

(fax) 800 820 2816

Europe:

(tel) 31 20 547 2111

Japan:

(tel) (81) 426 56 7832

(fax) (81) 426 56 7840

Korea:

(tel) (080) 769 0800

(fax) (080) 769 0900

Latin America:

(tel) (305) 269 7500

Taiwan:

(tel) 0800 047 866

(fax) 0800 286 331

Other Asia Pacific Countries:

(tel) (65) 6375 8100

(fax) (65) 6755 0042

Email: tm_ap@agilent.com

Contacts revised: 09/26/05

Product specifications and descriptions in

this document subject to change without

notice.

Microsoft®and Windows®are U.S. registered

trademarks of Microsoft®Corporation

LabVIEWTM is a U.S. registered trademark of

National Instruments Corporation

Printed in the USA, February 28, 2006

5989-4829EN

Agilent Technologies’ Test and Measurement

Support, Services, and Assistance

Agilent Technologies aims to maximize the

value you receive, while minimizing your

risk and problems. We strive to ensure that

you get the test and measurement capabil-

ities you paid for and obtain the support

you need. Our extensive support resources

and services can help you choose the right

Agilent products for your applications and

apply them successfully. Every instrument

and system we sell has a global warranty.

Two concepts underlie Agilent’s overall

support policy: “Our Promise” and “Your

Advantage.”

Our Promise

Our Promise means your Agilent test and

measurement equipment will meet its

advertised performance and functionality.

When you are choosing new equipment,

we will help you with product information,

including realistic performance specifica-

tions and practical recommendations from

experienced test engineers. When you

receive your new Agilent equipment, we

can help verify that it works properly and

help with initial product operation.

Your Advantage

Your Advantage means that Agilent offers

a wide range of additional expert test and

measurement services, which you can

purchase according to your unique technical

and business needs. Solve problems

efficiently and gain a competitive edge

by contracting with us for calibration,

extra-cost upgrades, out-of-warranty

repairs, and on-site education and training,

as well as design, system integration,

project management, and other professional

engineering services. Experienced Agilent engi-

neers and technicians worldwide can help you

maximize your productivity, optimize the return

on investment of your Agilent instruments and

systems, and obtain dependable measurement

accuracy for the life of those products.

Agilent Email Updates

www.agilent.com/find/emailupdates

Get the latest information on the products and

applications you select.

Agilent Direct

www.agilent.com/find/agilentdirect

Quickly choose and use your test equipment

solutions with confidence.

Agilent Open

www.agilent.com/find/open

Agilent Open simplifies the process of connecting

and programming test systems to help engineers

design, validate and manufacture electronic prod-

ucts. Agilent offers open connectivity for a broad

range of system-ready instruments, open industry

software, PC-standard I/O and global support,

which are combined to more easily integrate test

system development.

Agilent Technologies