Datasheet NE521D Datasheet (Philips)

INTEGRATED CIRCUITS

NE521

High-speed dual-differential
comparator/sense amp

Product data
Supersedes data of 1994 Aug 31
File under Integrated Circuits, IC11 Handbook

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2001 Aug 03

Philips Semiconductors Product data

NE521High-speed dual-differential comparator/sense amp

FEA TURES

•12 ns maximum guaranteed propagation delay

PIN CONFIGURATION

D, N Packages

•20 µA maximum input bias current

•TTL compatible strobes and outputs

•Large common-mode input voltage range

•Operates from standard supply voltages

APPLICATIONS

•MOS memory sense amp

•A-to-D conversion

•High-speed line receiver

INPUT 1A

INPUT 1B

OUTPUT 1Y

STROBE 1G

STROBE S

1

2

3

NC

4

5

6

78

GND

TOP VIEW

Figure 1. Pin Configuration

ORDERING INFORMATION

DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG #

14-Pin Plastic Dual In-Line Package (DIP) 0 °C to +70 °C NE521N SOT27-1
14-Pin SO Package 0 °C to +70 °C NE521D SOT108-1

EQUIVALENT SCHEMATIC

V+

14

R2 R1

R17

R20

14

13

12

11

10

9

R21

V+

V–

INPUT 2A

INPUT 2B

NC

OUTPUT 2Y

STROBE 2G

SL00242

R25

Q3

Q4

–

2

+

1

V–

13

+

12

–

11

V+

Q2 Q1

R8

Q16

Q15 Q14

R12 R11

Q9

Q10 Q8

R4

Q18

R5 R3

R10

Q17

D4

Q20

D7

Q21

D6

Q13

R7

D5

Q6

Q11

R15 R6

Q19

Q22 Q23

R16

Q7

Q5

R14

R9

Q24

R18

R19

Q25

R26

6

R28

Q32

R27

5

D2

D3

8

Q31

Q26

R22

Q36

Q32

R29

R30

Q30

Q27

R24

R23

Q29

4

Q28

7

Q35

9

Q34

R34

SL00243

Figure 2. Equivalent Schematic

2001 Aug 03 853-0900 26834

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Philips Semiconductors Product data

NE521High-speed dual-differential comparator/sense amp

BLOCK DIAGRAM

INPUT 1A
INPUT 1B

OUTPUT 1Y

STROBE 1G

STROBE S

(6)

(1)

(2)

(12)
(4)
(5)

INPUT 2A

(11)

INPUT 2B

(9)

OUTPUT 3Y

(8)

STROBE 2G

SL00244

LOGIC FUNCTIONS

V

ID

–

A+, B

VID ≤ –V

OS

–VOS < VID < V

VID ≥ V

OS

X L X H
X X L H

STROBE S STROBE G OUTPUT (Y)

OS

H H L
H H Undefined
H H H

Figure 3. Block Diagram

ABSOLUTE MAXIMUM RATINGS

SYMBOL PARAMETER RATING UNIT

Supply voltage
V+ Positive +7 V
V– Negative -7 V

V

IDR

V

IN

P

D

T

amb

T

stg

T

sld

NOTES:

1. Derate above 25 °C at the following rates:
N package at 11.4 mW/°C
D package at 8.3 mW/°C

Differential input voltage ±6 V
Input voltage

Common mode ±5 V
Strobe/gate +5.25 V

Maximum power dissipation
T

= 25 °C (still-air)

amb

1

N package 1420 mW

D package 1040 mW
Operating temperature range 0 to 70 °C
Storage temperature range –65 to +150 °C
Lead soldering temperature (10 sec. max) +230 °C

2001 Aug 03

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Philips Semiconductors Product data

SYMBOL

PARAMETER

TEST CONDITIONS

UNIT

SYMBOL

PARAMETER

FROM INPUT

TO OUTPUT

UNIT

NE521High-speed dual-differential comparator/sense amp

DC ELECTRICAL CHARACTERISTICS

V+ = +5 V; V– = –5 V, T

V

OS

Input offset voltage V+ = +4.75 V; V– = –4.75 V

At 25 °C 6 7.5 mV
Over temperature range 10 mV

I

BIAS

Input bias current V+ = +5.25 V, V– = –5.25 V

At 25 °C 7.5 20 µA
Over temperature range 40 µA

I

OS

Input offset current V+ = +5.25 V, V– = –5.25 V

At 25 °C 1.0 5 µA
Over temperature range 12 µA

V

CM

Common-mode voltage range V+ = +4.75 V, V– = –4.75 V –3 +3 V
Input current V+ = +5.25 V, V– = –5.25 V

I

IH

High VIH = 2.7 V

Input Current

I

IL

Low VIL = 0.5 V

Output voltage V

V

OH

V

OL

High V+ = +4.75 V; V– = –4.75 V; I
Low V+ = +5.25 V; V– = –5.25 V; I

Supply voltage
V+ Positive 4.75 5.0 5.25 V
V– Negative –4.75 –5.0 –5.25 V

Supply current V+ = 5.25 V; V– = –5.25 V; T
I

CC+

I

CC–

I

SC

Positive 27 35 mA
Negative –15 –28

Short-circuit output current -40 –100 mA

= 0 °C to +70 °C, unless otherwise specified.

amb

LIMITS

Min Typ Max

1G or 2G strobe 50 µA

Common strobe S 100 µA

1G or 2G strobe –2.0 mA

Common strobe S –4.0 mA

= 2.0 V

I(S)

= –1 mA 2.7 3.4 V

LOAD

= 20 mA 0.5 V

LOAD

= 25 °C

amb

AC ELECTRICAL CHARACTERISTICS

T

= 25 °C; RL = 280Ω ; CL=15 pF; V+ = 5 V; V– = 5 V

amb

Large-signal switching speed

Propagation delay
t

PLH(D)

t

PHL(D)

t

PLH(S)

t

PHL(S)

f

MAX

Low to high
High to low
Low to high
High to low
Max. operating frequency 40 55 MHz

NOTES:

1. Response time measured from 0 V point of ±100 mV

2. Response time measured from 1.5 V point of input to 1.5 V point of the output.

2001 Aug 03

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1

2

2

Amp Output 8 12

Amp Output 6 9 ns
Strobe Output 4.5 10
Strobe Output 3.0 6

10 MHz square wave to the 1.5 V point of the output.

P-P

4

LIMITS

Min Typ Max

Philips Semiconductors Product data

NE521High-speed dual-differential comparator/sense amp

TYPICAL PERFORMANCE CHARACTERISTICS

PROPAGATION DELAY (ns)

Response Time for Various

Input Overdrives

10mV

TIME — nS

VS = +5V
T

amb

5mV

= 25oC

100

INPUT VOLTAGE (mV) OUTPUT VOLTAGE (V)

4
3

100mV

2

20mV

1
0

100

50

0

INPUT VOLTAGE (mV) OUTPUT VOLTAGE (V)

0 5 10 15 20 25 30

Propagation Delay for

Various Input Voltages

VS = +5V

TPD (LH)

TPD (HL)

10MHz SQUARE

WAVE INPUT

= 25oC

T

amb

12

10

8

6

20

18
16

14
12

10

PROPAGATION DELAY (ns)

Response Time for Various

Input Overdrives

4
3

50mV

2
1
0

50

0

0 5 10 15 20 25 30

Propagation Delay for

Various Input Voltages

8

6
4

2

TPD (LH)

TPD (HL)

T

amb

V

S

5mV
10mV100mV

TIME — nS

VS = +5V

10MHz SQUARE

WAVE INPUT
T

= 25oC

amb

= 25oC

= +5V

Response Time vs Temperature

12

10

8

6

4

TESPONSE TIME (ns)

2

60 20 –20 +60 +100 +140

TPD (LH)

TPD (HL)

AMBIENT TEMPERATURE (

o

Output Voltage vs

Ambient Temperature

4.0
V

OH

3.0

2.0

OUTPUT VOLTAGE (V)

1.0

V

OL

C)

10 20 30 40 50 60 70

INPUT VOLTAGE (mVp–p)

Input Bias Current vs

12

11

10

µ

9

8

7

INPT BIAS CURRENT ( A)

6

–75 –25 +25 +75 +125

Ambient Temperature

AMBIENT TEMPERATURE

2001 Aug 03

100

1000

INPUT VOLTAGE (m Vp–p)

–25

–75

AMBIENT TEMPERATURE (

+25

+75 +125

o

C)

Input Offset Current vs

1.1

1.0

µ

0.9

0.8

0.7

0.6

INPUT OFSET CURRENT ( A)

0.5

o

(

C)

–75 –25 +25 +75 +125

Ambient Temperature

AMBIENT TEMPERATURES (

o

C)

SL00245

Figure 4. Typical Performance Characteristics

5

Philips Semiconductors Product data

NE521High-speed dual-differential comparator/sense amp

DIP14: plastic dual in-line package; 14 leads (300 mil) SOT27-1

2001 Aug 03

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Philips Semiconductors Product data

NE521High-speed dual-differential comparator/sense amp

SO14: plastic small outline package; 14 leads; body width 3.9 mm SOT108-1

2001 Aug 03

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Philips Semiconductors Product data

NE521High-speed dual-differential comparator/sense amp

Data sheet status

Product

Data sheet status

Objective data

Preliminary data

Product data

[1] Please consult the most recently issued data sheet before initiating or completing a design.
[2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL

http://www.semiconductors.philips.com.

[1]

status

Development

Qualification

Production

[2]

Definitions

Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For

detailed information see the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one

or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may affect device reliability.

Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.

Disclaimers

Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can

reasonably be expected to result in personal injury . Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.

Right to make changes — Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard
cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified.

Contact information

For additional information please visit
http://www.semiconductors.philips.com . Fax: [phone]

For sales offices addresses send e-mail to:

[e-mail].

Definitions

This data sheet contains data from the objective specification for product development.
Philips Semiconductors reserves the right to change the specification in any manner without notice.

This data sheet contains data from the preliminary specification. Supplementary data will be
published at a later date. Philips Semiconductors reserves the right to change the specification
without notice, in order to improve the design and supply the best possible product.

This data sheet contains data from the product specification. Philips Semiconductors reserves the
right to make changes at any time in order to improve the design, manufacturing and supply.
Changes will be communicated according to the Customer Product/Process Change Notification
(CPCN) procedure SNW-SQ-650A.

 Koninklijke Philips Electronics N.V. 2001

All rights reserved. Printed in U.S.A.

Date of release: 05-01

Document order number: 9397 750 09192

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2001 Aug 03

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