© Semiconductor Components Industries, LLC, 2006
October, 2006 − Rev. 4
1Publication Order Number:
NE521/D
NE521
High−Speed
Dual−Differential
Comparator/Sense Amp
Features
•TTL-Compatible Strobes and Outputs
•Large Common-Mode Input Voltage Range
•Operates from Standard Supply Voltages
•Pb−Free Packages are Available
Applications
•MOS Memory Sense Amp
•A-to-D Conversion
•High-Speed Line Receiver
MAXIMUM RATINGS
Rating Symbol Value Unit
Supply Voltage
Positive
Negative
V+
V−
+7.0
−7.0
V
Differential Input Voltage VIDR "6.0 V
Input Voltage
Common Mode
Strobe/Gate
VIN
"5.0
+5.25
V
Maximum Power Dissipation (Note 1)
TA = 25°C (Still−Air)
N Package
D Package
PD
1420
1040
mW
Thermal Resistance, Junction−to−Ambient
N Package
D Package
RqJA 100
145
°C/W
Operating Temperature Range TA0 to 70 °C
Storage Temperature Range Tstg −65 to +150 °C
Operating Junction Temperature TJ150 °C
Lead Soldering Temperature (10 sec max) Tsld +230 °C
Stresses exceeding Maximum Ratings may damage the device. Maximum
Ratings are stress ratings only. Functional operation above the Recommended
Operating Conditions is not implied. Extended exposure to stresses above the
Recommended Operating Conditions may affect device reliability.
1. Derate above 25°C at the following rates:
N package at 10 mW/°C
D package at 6.9 mW/°C.
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See detailed ordering and shipping information in the package
dimensions section on page 5 of this data sheet.
ORDERING INFORMATION
PIN CONNECTIONS
SOIC−14
D SUFFIX
CASE 751A
INPUT 1A
INPUT 1B
NC
V+
V−
INPUT 2A
INPUT 2B
OUTPUT 1Y
STROBE 1G
GROUND
NC
OUTPUT 2Y
STROBE 2G
D, N Packages
STROBE S
1
2
3
4
5
6
7
14
13
12
11
10
9
8
(Top View)
1
PDIP−14
N SUFFIX
CASE 646
1
NE521G
AWLYWW
1
MARKING
DIAGRAMS
NE521N
AWLYYWWG
A = Assembly Location
WL = Wafer Lot
Y, YY = Year
WW = Work Week
G = Pb−Free Package
1
14
14
NE521
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2
LOGIC FUNCTION TABLE
VID (A+, B) Strobe S Strobe G Output (Y)
VID v −VOS H H L
−VOS < VID < VOS H H Undefined
VID w VOS H H H
X L X H
X X L H
Figure 1. Block Diagram
(12)
INPUT 2A
(11)
INPUT 2B
(9)
OUTPUT 3Y
(8)STROBE 2G
(1)
(2)
(4)
(5)
INPUT 1A
INPUT 1B
OUTPUT 1Y
STROBE 1G
(6)
STROBE S
Q11
V+
14
2−
+
1
V−
13
R2 R1
Q2 Q1
Q4 Q3
D7
Q9
R4
Q10 Q8
R5 R3
D6
R17
Q6
R16
Q5
Q13
R15 R6
R9
Q19
Q7
R14
5
D2
Q25
R20
6
R21
Q26
Q30
R24
R23
Q27
Q29
Q28
R25
7
12 +
−
11
V+
R8
Q16
Q15 Q14
R12 R11
Q18
R10
Q17
D4
Q20 Q21
R7
D5 Q22 Q23
R18
R19
D3
8
Q24
Q31
R26
Q32
R27
R28
Q36
R29
R30
Q32
Q35
9
Q34
R34
R22
4
Figure 2. Equivalent Schematic
D1
NE521
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3
DC ELECTRICAL CHARACTERISTICS (V+ = +5.0 V; V− = −5.0 V, TA = 0°C to +70°C, unless otherwise noted.)
Characteristic Test Conditions Symbol
Limits
Unit
Min Typ Max
Input Offset Voltage
At 25°C
Overtemperature Range
V+ = +4.75 V; V− = −4.75 V VOS
−
−
6.0
−
7.5
10
mV
Input Bias Current
At 25°C
Overtemperature Range
V+ = +5.25 V; V− = −5.25 V IBIAS
−
−
7.5
−
20
40
mA
Input Offset Current
At 25°C
Overtemperature Range
V+ = +5.25 V; V− = −5.25 V IOS
−
−
1.0
−
5.0
12
mA
Common-Mode Voltage Range V+ = +4.75 V; V− = −4.75 V VCM −3.0 −+3.0 V
Input Current
High
V+ = +5.25 V; V− = −5.25 V
VIH = 2.7 V
1G or 2G Strobe
Common Strobe S
IIH
−
−
−
−
50
100
mA
Input Current
Low
VIL = 0.5 V
1G or 2G Strobe
Common Strobe S
IIL
−
−
−
−
−2.0
−4.0
mA
Output Voltage
High
Low
VI(S) = 2.0 V
V+ = +4.75 V; V− = −4.75 V;
ILOAD = −1.0 mA
V+ = +5.25 V; V− = −5.25 V;
ILOAD = 20 mA
VOH
VOL
2.7 3.4
0.5
V
Supply Voltage
Positive
Negative
−V+
V−
4.75
−4.75
5.0
−5.0
5.25
−5.25
V
Supply Current
Positive
Negative
V+ = +5.25 V; V− = −5.25 V;
TA = 25°C ICC+
ICC−
−
−
27
−15
35
−28
mA
Short−Circuit Output Current −ISC −40 − −100 mA
AC ELECTRICAL CHARACTERISTICS (TA = 25°C; RL = 280 W; CL = 15 pF, V+ = 5.0 V; V− = 5.0 V, guaranteed by characterization)
Characteristic From Input To Output Symbol
Limits
Unit
Min Typ Max
Large−Signal Switching Speed
Propagation Delay
Low to High (Note 2)
High to Low (Note 2)
Low to High (Note 3)
High to Low (Note 3)
Amp
Amp
Strobe
Strobe
Output
Output
Output
Output
tPLH(D)
tPHL(D)
tPLH(S)
tPHL(S)
−
−
−
−
9.6
8.2
4.8
3.9
12
9.0
10
6.0
ns
Max. Operating Frequency − − fMAX 40 55 −MHz
2. Response time measured from 0 V point of "100 mVP-P 10 MHz square wave to the 1.5 V point of the output.
3. Response time measured from 1.5 V point of input to 1.5 V point of the output.
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4
TYPICAL PERFORMANCE CHARACTERISTICS
20mV 5mV
10mV
4
3
2
1
0
100
50
0
0 5 10 15 20 25 30
VS = +5V
TA = 25oC
100mV
TIME — nS
INPUT VOLTAGE (mV) OUTPUT VOLTAGE (V)
TA = 25oC
VS = +5V
5mV
10mV100mV
50mV
0 5 10 15 20 25 30
TIME — nS
INPUT VOLTAGE (mV) OUTPUT VOLTAGE (V)
4
3
2
1
0
100
50
0
INPUT VOLTAGE (mVp−p)
PROPAGATION DELAY (ns)
VS = +5V
10MHz SQUARE
WAVE INPUT
TA = 25oC
TPD (LH)
TPD (HL)
10 20 30 40 50 60 70
12
10
8
6
20
18
16
14
12
10
8
6
4
2
100 1000
INPUT VOLTAGE (m Vp−p)
PROPAGATION DELAY (ns)
VS = +5V
10MHz SQUARE
WAVE INPUT
TA = 25oC
TPD (LH)
TPD (HL)
4.0
3.0
2.0
1.0
−75 −25 +25 +75
VOL
VOH
AMBIENT TEMPERATURE (oC)
OUTPUT VOLTAGE (V)
−75 −25 +25 +75 +125
AMBIENT TEMPERATURE (oC)
12
11
10
9
8
7
6
INPT BIAS CURRENT ( A)
μ
1.1
1.0
0.9
0.8
0.7
0.6
0.5
−75 −25 +25 +75 +125
AMBIENT TEMPERATURES (oC)
INPUT OFSET CURRENT ( A)
μ
12
10
8
6
4
2
60 20 −20 +60 +100 +140
TPD (LH)
TPD (HL)
AMBIENT TEMPERATURE (oC)
TESPONSE TIME (ns)
Figure 3. Response Time for
Various Input Overdrives
Figure 4. Response Time for
Various Input Overdrives
Figure 5. Response Time
vs. Temperature
Figure 6. Propagation Delay
for Various Input Voltages
Figure 7. Propagation Delay
for Various Input Voltages
Figure 8. Output Voltage vs.
Ambient Temperature
Figure 9. Input Bias Current
vs. Ambient Temperature
Figure 10. Input Offset
Current vs. Ambient
Temperature
+125
NE521
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5
ORDERING INFORMATION
Device Temperature Range Package Shipping†
NE521D
0 to +70°C
SOIC−14
55 Units/Rail
NE521DG SOIC−14
(Pb−Free)
NE521DR2 SOIC−14
2500/Tape & Reel
NE521DR2G SOIC−14
(Pb−Free)
NE521N PDIP−14
25 Units/Rail
NE521NG PDIP−14
(Pb−Free)
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
NE521
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6
PACKAGE DIMENSIONS
SOIC−14
CASE 751A−03
ISSUE H
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE
DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.127
(0.005) TOTAL IN EXCESS OF THE D
DIMENSION AT MAXIMUM MATERIAL
CONDITION.
−A−
−B−
G
P7 PL
14 8
7
1
M
0.25 (0.010) B M
S
B
M
0.25 (0.010) A S
T
−T−
F
RX 45
SEATING
PLANE D14 PL K
C
J
M
_DIM MIN MAX MIN MAX
INCHESMILLIMETERS
A8.55 8.75 0.337 0.344
B3.80 4.00 0.150 0.157
C1.35 1.75 0.054 0.068
D0.35 0.49 0.014 0.019
F0.40 1.25 0.016 0.049
G1.27 BSC 0.050 BSC
J0.19 0.25 0.008 0.009
K0.10 0.25 0.004 0.009
M0 7 0 7
P5.80 6.20 0.228 0.244
R0.25 0.50 0.010 0.019
__ __
7.04
14X
0.58
14X
1.52
1.27
DIMENSIONS: MILLIMETERS
1
PITCH
SOLDERING FOOTPRINT*
7X
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
NE521
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7
PACKAGE DIMENSIONS
PDIP−14
CASE 646−06
ISSUE P
17
14 8
B
ADIM MIN MAX MIN MAX
MILLIMETERSINCHES
A0.715 0.770 18.16 19.56
B0.240 0.260 6.10 6.60
C0.145 0.185 3.69 4.69
D0.015 0.021 0.38 0.53
F0.040 0.070 1.02 1.78
G0.100 BSC 2.54 BSC
H0.052 0.095 1.32 2.41
J0.008 0.015 0.20 0.38
K0.115 0.135 2.92 3.43
L
M−−− 10 −−− 10
N0.015 0.039 0.38 1.01
__
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.
5. ROUNDED CORNERS OPTIONAL.
F
HG D
K
C
SEATING
PLANE
N
−T−
14 PL
M
0.13 (0.005)
L
M
J0.290 0.310 7.37 7.87
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to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any
liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental
damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over
time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under
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PUBLICATION ORDERING INFORMATION
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USA/Canada
Europe, Middle East and Africa Technical Support:
Phone: 421 33 790 2910
Japan Customer Focus Center
Phone: 81−3−5773−3850
NE521/D
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