Document
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
Philips Semiconductors
Product data
High-speed dual-differential comparator/sense amp
NE521
FEATURES
• 12 ns maximum guaranteed propagation delay • 20 µA maximum input bias current • TTL compatible strobes and outputs • Large common-mode input voltage range • Operates from standard supply voltages
APPLICATIONS
PIN CONFIGURATION
D, N Packages
INPUT 1A INPUT 1B NC OUTPUT 1Y STROBE 1G STROBE S GND 1 2 3 4 5 6 7 TOP VIEW 14 13 12 11 10 9 8 V+ V– INPUT 2A INPUT 2B NC OUTPUT 2Y STROBE 2G
• MOS memory sense amp • A-to-D conversion • High-speed line receiver
SL00242
Figure 1. Pin Configuration
ORDERING INFORMATION
DESCRIPTION 14-Pin Plastic Dual In-Line Package (DIP) 14-Pin SO Package TEMPERATURE RANGE 0 °C to +70 °C 0 °C to +70 °C ORDER CODE NE521N NE521D DWG # SOT27-1 SOT108-1
EQUIVALENT SCHEMATIC
V+ 14 R2 R1 R17 R20 R21 R25
Q4 – Q2 + Q10 Q1
Q3 R16 D7 D6 Q6 Q5 Q7 5
Q25 Q26
Q30 Q29 R24 6 Q28 4
2
1
Q9
Q8
Q13
Q11
R14 D2
R22
R23 Q27 7
R4 13 V– R8 Q16 12 11 + – Q18 R10
R5
R3
R15
R6
R7 Q19
R9 D3
Q36 R28 R29 Q35
Q17
Q15
Q14
D4
D5
Q22
Q23 Q24
8 R30 Q32 Q31 Q32 Q34
9
Q20
R18 Q21
R12 V+
R11
R19
R26
R27
R34
SL00243
Figure 2. Equivalent Schematic
2001 Aug 03
2
853-0900 26834
Philips Semiconductors
Product data
High-speed dual-differential comparator/sense amp
NE521
BLOCK DIAGRAM
(1) INPUT 1A (2) INPUT 1B (12) INPUT 2A (11) INPUT 2B
LOGIC FUNCTIONS
VID A +, B – VID ≤ –VOS –VOS < VID < VOS VID ≥ VOS X
(9) OUTPUT 3Y (8) STROBE 2G
STROBE S H H H L X
STROBE G H H H X L
OUTPUT (Y) L Undefined H H H
OUTPUT 1Y STROBE 1G
(4) (5) (6)
STROBE S
X
SL00244
Figure 3. Block Diagram
ABSOLUTE MAXIMUM RATINGS
SYMBOL V+ V– VIDR VIN Supply voltage Positive Negative Differential input voltage Input voltage Common mode Strobe/gate Maximum power dissipation1 Tamb = 25 °C (still-air) N package D package Operating temperature range Storage temperature range Lead soldering temperature (10 sec. max) PARAMETER RATING +7 -7 ±6 ±5 +5.25 UNIT V V V V V
PD
1420 1040 0 to 70 –65 to +150 +230
mW mW °C °C °C
Tamb Tstg Tsld
NOTES: 1. Derate above 25 °C at the following rates: N package at 11.4 mW/°C D package at 8.3 mW/°C
2001 Aug 03
3
Philips Semiconductors
Product data
High-speed dual-differential comparator/sense amp
NE521
DC ELECTRICAL CHARACTERISTICS
V+ = +5 V; V– = –5 V, Tamb = 0 °C to +70 °C, unless otherwise specified. LIMITS SYMBOL VOS PARAMETER Input offset voltage At 25 °C Over temperature range Input bias current At 25 °C Over temperature range Input offset current At 25 °C Over temperature range Common-mode voltage range Input current High TEST CONDITIONS V+ = +4.75 V; V– = –4.75 V 6 V+ = +5.25 V, V– = –5.25 V 7.5 V+ = +5.25 V, V– = –5.25 V 1.0 V+ = +4.75 V, V– = –4.75 V V+ = +5.25 V, V– = –5.25 V VIH = 2.7.