Philips NE521D Datasheet
INTEGRATED CIRCUITS
NE521
High-speed dual-differential
comparator/sense amp
Product data
Supersedes data of 1994 Aug 31
File under Integrated Circuits, IC11 Handbook
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
2
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
3
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