Datasheet LM6511IMX, LM6511IM Datasheet (NSC)

LM6511
180 ns 3V Comparator

LM6511 180 ns 3V Comparator

June 1999

General Description

The LM6511voltagecomparatorisidealforanalog-digitalin­terface circuitry when only a +3V or +3.3V supply is avail­able. The open-collector output permits signal compatibility
with a wide variety of digital families: +5V CMOS, +3V
CMOS, TTL and so on. Supply voltage may range from 2.7V
to 36V between supply voltage leads. The LM6511 operates
with little power consumption (P
+2.7V and V

This voltage comparator offers many features that are avail­able in traditional sub-microsecond comparators: output
sync strobe, inputs and output may be isolated from system
ground, and wire-ORing. Also, the LM6511 uses the
industry-standard, single comparator pinout configuration.

−

=

0V).

<

diss

9.45 mW at V

+

Connection Diagram

8-Pin SO

Ordering Information

Package Industrial Temperature Range NSC Package

8-Pin Small Outline LM6511IM M08A

Features

(Typical unless otherwise noted)

n Operates at +2.7V, +3V, +3.3V, +5V
n Low Power consumption
n Fast Response Time of 180 ns

Applications

=

n Portable Equipment
n Cellular Phones
n Digital Level Shifting

−40˚C to +85˚C Drawing

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<

9.45 mW@V

+

=

2.7V (max)

© 1999 National Semiconductor Corporation DS011888 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 −0.3 to +36V
Output to Negative Supply Voltage 50V
Ground to Negative Supply Voltage 30V
Differential Input Voltage
Input Voltage (Note 2)
Storage Temperature Range −65˚C to +150˚C
Soldering Information:

SO Package

(Vapor Phase in 60 sec)

SO Package (Infrared in 15 sec)

±

30V

215˚C
220˚C

Power Dissipation 500 mW
Output Short Circuit Duration 10s
Junction Temperature 150˚C
ESD Rating

(C=+100 pF, R=1.5 kΩ) 300V

Operating Ratings (Note 1)

Supply Voltage 2.5V to 30V
Temperature Range −40˚C ≤ T
Thermal Resistance (θ

)

JA

SO Package 170˚C/W

≤ +85˚C

J

DC Electrical Characteristics

Unless otherwise specified, all limits guaranteed for TJ= 25˚C. Boldface limits apply at the temperature extremes. V+= 2.7V,
V−= 0V, 50Ω≤RL≤50kΩ, and IL= 1.0 mA unless otherwise specified

Symbol Parameter Conditions Typical LM6511I Units

Limit

V

OS

Offset Voltage RS≤ 50 kΩ 1.5 5 mV

(Note 3) 8 max

I

B

Input Bias Current 38 130

200 nA

I

OS

Input Offset Current RS≤ 50 kΩ 1.5 20

(Note 3) 50

I

S

Positive Supply Current 2.7 3.5

5 mA

Negative Supply Current 1.5 2.0

2.5

V

SAT

A

V

Saturation Voltage VIN≤ 10 mV 0.23 0.4 V

=

I

8mA 0.4 max

SINK

Large Signal Voltage Gain ∆V

=

2V 40 V/mV

OUT

CMRR Common Mode Rejection Ratio 72 dB
I

STROBE

V

IN

Strobe ON Current (Note 5) 2.0 5.0 mA max
Input Voltage Range 0.50 V min

+

V

− 1.25 V max

Output Leakage Current V

≥ 10 mV, V

IN

I

STROBE

=

=

35V, 0.2 nA

OUT

3 mA max

(Limits)

max

max

AC Electrical Characteristics

Unless otherwise specified, all limits guaranteed for TJ= 25˚C. Boldface limits apply at the temperature extremes. V+= 2.7V,
V−= 0V, 50Ω≤RL≤50kΩ, and IL= 1.0 mA unless otherwise specified

Symbol Parameter Conditions Typical LM6511I Units

Limit

T

R

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions the device is intended to
be functional, butdo not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed
specifications apply only for the test conditions listed.

Note 2: The positive input voltage limit is 30V above the negative supply voltage. The negative input voltage limit is equal to the negative supply voltage or 30V below
the positive supply voltage, whichever is less.

Note 3: The offset voltage and offset current limits are the maximum values required to drive the output within a volt of either supply witha1mAload. Therefore,
these parameters define an error band and take into account the worst-case effects of voltage gain and input impedance.

Note 4: This specification is for a 100 mV input step with a 25 mV overdrive.
Note 5: This specification gives the range of current which must be drawn from the strobe pin to ensure the output is properly disabled. Do not short the strobe pin

to ground; it should be current driven at 3 mA to 5 mA.

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Response Time (Note 4) 180 ns

(Limits)

Schematic Diagram

LM6511 Typical Performance Characteristics

Input Bias Current

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Input Offset Current

=

V

3V unless otherwise noted

S

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Input Current vs

Input Voltage

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LM6511 Typical Performance Characteristics V

=

3V unless otherwise noted (Continued)

S

Common Mode Limits

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Output Current Limiting

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Transfer Function

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Supply Current vs

Temperature

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Propagation Delay vs Overdrive

Output Saturation Voltage

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Output Leakage Current

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Typical Application

Universal Logic Level Shifter

Notes: Because of the very wide operating and output voltage range, the LM6511 may be used to shift logic levels from 3V to TTL or CMOS to the other way

around. By biasing the input to1⁄2of the input logic supply (VA), this assures that this input remains within the input voltage range. The pull-up resistor should
go to the output logic supply (VB).

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Physical Dimensions inches (millimeters) unless otherwise noted

8-Pin Small Outline Package (M)

Order Number LM6511IM

Package Number M08A

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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

8-Pin Molded Dual-In-Line Package (N)

Order Number LM6511IN

Package Number N08E

LM6511 180 ns 3V Comparator

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labeling, can be reasonably expected to result in a
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