NSC DS90LV027ATMX, DS90LV027ATM Datasheet

DS90LV027A
LVDS Dual High Speed Differential Driver

General Description

The DS90LV027Ais a dual LVDSdriver device optimized for
high data rate and low power applications. The device is de­signed to support data rates in excess of 600Mbps
(300MHz) utilizing Low Voltage Differential Signaling (LVDS)
technology.The DS90LV027A is a current mode driver allow­ing power dissipation to remain low even at high frequency.
In addition, the short circuit fault current is also minimized.

The device is in a 8-lead small outline package. The
DS90LV027A has a flow-through design for easy PCB lay­out. The differential driver outputs provides low EMI with its
typical low output swing of 360 mV. It is perfect for high
speed transfer of clock and data. The DS90LV027A can be
paired with its companion dual line receiver, the
DS90LV028A, or with any of National’s LVDS receivers, to
provide a high-speed point-to-point LVDS interface.

Features

n

>

600 Mbps (300MHz) switching rates

n 0.3 ns typical differential skew
n 0.7 ns maximum differential skew
n 1.5 ns maximum propagation delay
n 3.3V power supply design

n

±

360 mV differential signaling

n Low power dissipation (46 mW

@

3.3V static)

n Flow-through design simplifies PCB layout
n Interoperable with existing 5V LVDS devices
n Power Off Protection (outputs in high impedance)
n Conforms to TIA/EIA-644 Standard
n 8-Lead SOIC package saves space
n Industrial temperature operating range

(−40˚C to +85˚C)

Connection Diagram

Functional Diagram

Dual-In-Line

DS100114-1

Order Number DS90LV027ATM

See NS Package Number M08A

DS100114-2

DS100114-3

March 2000

DS90LV027A LVDS Dual High Speed Differential Driver

© 2000 National Semiconductor Corporation DS100114 www.national.com

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 (V

CC

) −0.3V to +4V
Input Voltage (DI) −0.3V to +3.6V
Output Voltage (DO

±

) −0.3V to +3.9V

Maximum Package Power Dissipation

@

+25˚C
M Package 1190 mW
Derate M Package 9.5 mW/˚C above +25˚C

Storage Temperature Range −65˚C to +150˚C

Lead Temperature Range Soldering

(4 sec.) +260˚C

ESD Ratings

(HBM 1.5 kΩ, 100 pF) ≥ 8kV
(EIAJ 0 Ω, 200 pF) ≥ 1000V
(CDM) ≥ 1000V
(IEC direct 330 Ω, 150 pF) ≥ 4kV

Recommended Operating
Conditions

Min Typ Max Units

Supply Voltage (V

CC

) 3.0 3.3 3.6 V

Temperature (T

A

) −40 25 +85 ˚C

Electrical Characteristics

Over Supply Voltage and Operating Temperature ranges, unless otherwise specified. (Notes 2, 3, 7)

Symbol Parameter Conditions Pin Min Typ Max Units
DIFFERENTIAL DRIVER CHARACTERISTICS

V

OD

Output Differential Voltage RL= 100Ω

(

Figure 1

)

DO+,

DO−

250 360 450 mV

∆V

OD

VODMagnitude Change 135mV

V

OH

Output High Voltage 1.4 1.6 V

V

OL

Output Low Voltage 0.9 1.1 V

V

OS

Offset Voltage 1.125 1.2 1.375 V

∆V

OS

Offset Magnitude Change 0 3 25 mV

I

OXD

Power-off Leakage V

OUT=VCC

or GND, VCC=0V

±

1

±

10 µA

I

OSD

Output Short Circuit Current −5.7 −8 mA

V

IH

Input High Voltage DI 2.0 V

CC

V

V

IL

Input Low Voltage GND 0.8 V

I

IH

Input High Current VIN= 3.3V or 2.4V

±

2

±

10 µA

I

IL

Input Low Current VIN= GND or 0.5V

±

1

±

10 µA

V

CL

Input Clamp Voltage ICL= −18 mA −1.5 −0.6 V

I

CC

Power Supply Current No Load VIN=VCCor GND V

CC

814mA

R

L

= 100Ω 14 20 mA

Switching Characteristics

Over Supply Voltage and Operating Temperature Ranges, unless otherwise specified. (Notes 3, 4, 5, 6)

Symbol Parameter Conditions Min Typ Max Units

DIFFERENTIAL DRIVER CHARACTERISTICS

t

PHLD

Differential Propagation Delay High to Low RL= 100Ω,CL= 15 pF 0.3 0.8 1.5 ns

t

PLHD

Differential Propagation Delay Low to High (

Figure 2

and

Figure 3

) 0.3 1.1 1.5 ns

t

SKD1

Differential Pulse Skew |t

PHLD−tPLHD

| (Note 8) 0 0.3 0.7 ns

t

SKD2

Channel to Channel Skew (Note 9) 0 0.4 0.8 ns

t

SKD3

Differential Part to Part Skew (Note 10) 0 1.0 ns

t

SKD4

Differential Part to Part Skew (Note 11) 0 1.2 ns

t

TLH

Transition Low to High Time 0.2 0.5 1.0 ns

t

THL

Transition High to Low Time 0.2 0.5 1.0 ns

f

MAX

Maximum Operating Frequency (Note 12) 350 MHz

Note 1: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. They are 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: Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground except V

OD

.

Note 3: All typicals are given for: V

CC

= +3.3V and TA= +25˚C.

Note 4: These parameters are guaranteed by design. The limits are based on statistical analysis of the device over PVT (process, voltage, temperature) ranges.
Note 5: C

L

includes probe and fixture capacitance.

Note 6: Generator waveform for all tests unless otherwise specified: f = 1 MHz, Z

O

=50Ω,tr≤1 ns, tf≤ 1 ns (10%-90%).

DS90LV027A

www.national.com 2

Switching Characteristics (Continued)

Note 7: The DS90LV027Ais a current mode device and only function with datasheet specification when a resistive load is applied to the drivers outputs.
Note 8: t

SKD1

,|t

PHLD−tPLHD

|, is the magnitude difference in differential propagation delay time between the positive going edge and the negative going edge of the

same channel.
Note 9: t

SKD2

is the Differential Channel to Channel Skew of any event on the same device.

Note 10: t

SKD3

, Differential Part to Part Skew,is defined as the difference between the minimum and maximum specified differential propagation delays. This speci-

fication applies to devices at the same V

CC

and within 5˚C of each other within the operating temperature range.

Note 11: t

SKD4

, part to part skew, is the differential channel to channel skew of any event between devices. This specification applies to devices over recommended

operating temperature and voltage ranges, and across process distribution. t

SKD4

is defined as |Max − Min| differential propagation delay.

Note 12: f

MAX

generator input conditions: tr=t

f

<

1 ns (0% to 100%), 50% duty cycle, 0V to 3V. Output criteria: duty cycle = 45%/55%, V

OD

>

250mV,all channels

switching.

Parameter Measurement Information

Application Information

TABLE 1. Device Pin Descriptions

Pin

#

Name Description

2, 3 DI TTL/CMOS driver input pins
6, 7 DO+ Non-inverting driver output pin
5, 8 DO− Inverting driver output pin

4 GND Ground pin
1V

CC

Positive power supply pin, +3.3V±0.3V

DS100114-4

FIGURE 1. Differential Driver DC Test Circuit

DS100114-5

FIGURE 2. Differential Driver Propagation Delay and Transition Time Test Circuit

DS100114-6

FIGURE 3. Differential Driver Propagation Delay and Transition Time Waveforms

DS90LV027A

www.national.com3