NSC CLC005AJE-TR13, CLC005AJE Datasheet

CLC005
ITU-T G.703 Cable Driver with Adjustable Outputs

General Description

National’s Comlinear CLC005 is a monolithic, high-speed
cable driver designed for the ITU-T G.703 serial digital data
transmission standard. The CLC005 drives 75Ω transmis­sion lines (Belden8281 or equivalent) at data rates fromDC
to over 622 Mbps.Outputsignal waveforms produced by the
CLC005 comply with G.703 specifications. Controlled output
rise and fall times (650 ps typical) minimize transition­induced jitter.The output voltage swing, typically 2.0V, set by
an accurate, low-drift internal bandgap reference, delivers a

1.0V swing to back-matched and terminated 75Ωcable.Out­put swing is adjustable from 0.7 V

p-p

to 2.2 V

p-p

using exter-

nal resistors.
The CLC005’s class AB output stage consumes less power

than other designs, 185 mW with both outputs terminated,
and requires no external bias resistors. The differential in­puts accept a widerange of digital signals from 200mV

p-p

to
G.703 levels within the specified common-mode limits. All
this make the CLC005 an excellent general purpose high
speed driver for digital applications.

The CLC005 is powered from a single +5V or −5.2V supply
and comes in an 8-pin SOIC package.

Key Specifications

n 650 ps rise and fall times
n Data rates to 622 Mbps
n 200 mV differential input
n Low residual jitter (25 ps

pp

)

Features

n No external pull-down resistors
n Adjustable output amplitude
n Differential input and output
n Low power dissipation
n Single +5V or −5.2V supply

Applications

n ITU-T G.703, Sonet/SDH, and ATM compatible driver
n Digital routers and distribution amplifiers
n Coaxial cable driver for digital transmission line
n Twisted pair driver
n Buffer applications

Typical Application

DS100144-2

August 1998

CLC005 ITU-T G.703 Cable Driver with Adjustable Outputs

© 1998 National Semiconductor Corporation DS100144 www.national.com

Typical Performance Characteristic

Connection Diagram (8-Pin SOIC)

DS100144-1

DS100144-3

Order Number CLC005AJE

See NS Package Number M08A

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Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.

Supply Voltage 6V
Output Current 30 mA
Maximum Junction Temperature +125˚C
Storage Temperature Range −65˚C to +150˚C
Lead Temperature

(Soldering 10 seconds) +300˚C

ESD Rating (Human Body Model) 1000V

Package Thermal Resistance

θ

JA

Surface Mount AJE 125˚C/W

θ

JC

Surface MountAJE 105˚C/W

Reliability Information

Transistor count 72
MTTF 254 Mhr

Recommended Operating
Conditions

Supply Voltage Range (VCC–VEE) +4.5V to +5.5V

Electrical Characteristics (V

CC

= 0V, VEE= −5V; unless otherwise specified).

Parameter Condition

Typ

+25˚C

Min/Max

+25˚C

Min/Max

0˚C to
+70˚C

Min/Max

-40˚C to
+85˚C

Units

STATIC DC PERFORMANCE

Supply Current, Loaded 150Ω

@

270 Mbps

(Notes 5, 7)

37 - - - mA

Supply Current, Unloaded (Note 3) 34 28/37 26/39 26/39 mA
Output HIGH Voltage (V

OH

) (Note 3) −1.7 −2.0/1.4 −2.0/1.4 −2.0/1.4 V

Output LOW Voltage (V

OL

) (Note 3) −3.7 −4.0/3.4 −4.0/3.4 −4.0/3.4 V
Input Bias Current (Note 4) 10 30 50 50 µA
Output Swing R

EXT

=∞(Note 3) 2.0 1.86/2.14 1.86/2.14 1.86/2.14 V

Output Swing R

EXT

=10kΩ(Note 5) 1.30 - - - V
Common Mode Input Range Upper Limit −0.7 −0.8 −0.8 −0.8 V
Common Mode Input Range Lower Limit −2.6 −2.5 −2.5 –2.5 V
Minimum Differential Input Swing (Note 5) 200 200 200 200 mV
Power Supply Rejection Ratio (Note 3) 26 20 20 20 dB

AC PERFORMANCE

Output Rise and Fall Time (Notes 3, 6, 7) 650 425/825 400/850 400/850 ps
Overshoot (Note 5) 5

%
Propagation Delay (Note 5) 1.0 ns
Duty Cycle Distortion (Note 5) 50 ps
Residual Jitter (Note 5) 25 - - - ps

pp

MISCELLANEOUS PERFORMANCE

Input Capacitance (Note 5) 1.0 pF
Output Resistance (Note 5) 10 Ω
Output Inductance (Note 5) 6 nH

Note 1: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. Theyare not meant to imply that the devices
should be operated at these limits. The table of “Electrical Characteristics” specifies conditions of device operation.

Note 2: Min/Max ratings are based on product characterization and simulation. Individual parameters are tested as noted. Outgoing quality levels are determined
from tested parameters.

Note 3: Spec is 100%tested at +25˚C, sample tested at +85˚C.
Note 4: Spec is 100%tested at +35˚C at wafer probe.
Note 5: Spec is guaranteed by design.
Note 6: Measured between the 20%and 80%levels of the waveform.
Note 7: Measured with both outputs driving 150Ω, AC coupled at 270 Mbps.

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Operation

INPUT INTERFACING

The CLC005 has high impedance, emitter-follower buffered,
differential inputs. Single-ended signals may also be input.
Transmission lines supplying input signals must be properly
terminated close to the CLC005. EitherA.C. or D.C. coupling
as in

Figure 2orFigure 3

may be used.

Figures 2, 4

and

Fig-

ure 5

show how Thevenin-equivalent resistor networks are

used to provide input termination and biasing.The input D.C.
common-mode voltage range is 0.8Vto 2.5V belowthe posi­tive power supply (V

CC

). Input signals plus bias should be
kept within the specified common-mode range. For an 800
mV

P-P

input signal, typical input bias levels range from 1.2V

to 2.1V below the positive supply.

Load Type Resistor to VCC(R1) Resistor to VEE(R2)

ECL, 50Ω, 5V, V

T

=2V 82.5Ω 124Ω

ECL, 50Ω, 5.2V, V

T

=2V 80.6Ω 133Ω

ECL, 75Ω, 5V, V

T

=2V 124Ω 187Ω

ECL, 75Ω, 5.2V, V

T

=2V 121Ω 196Ω

800mV

P-P

,50Ω, 5V, VT=1.6V 75.0Ω 154Ω

800mV

P-P

,75Ω, 5V, VT=1.6V 110Ω 232Ω

800mV

P-P

, 2.2KΩ, 5V, VT=1.6V 3240Ω 6810Ω

DS100144-4

FIGURE 1. Input Stage

DS100144-5

FIGURE 2. AC Coupled Input

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