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PDF MC14578 Data sheet ( Hoja de datos )
| Número de pieza | MC14578 | |
| Descripción | Micro-Power Comparator plus Voltage Follower | |
| Fabricantes | Motorola Semiconductors | |
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Technical Data
MC14578
Rev 2, 05/2005
CMOS
Micro-Power Comparator plus
Voltage Follower
The MC14578 is an analog building block consisting of a very-high input
impedance comparator. The voltage follower allows monitoring the noninverting
input of the comparator without loading.
Four enhancement-mode MOSFETs are also included on chip. These FETs
can be externally configured as open-drain or totem-pole outputs. The drains
have on-chip static-protecting diodes. Therefore, the output voltage must be
maintained between VSS and VDD.
The chip requires one external component. A 3.9 MΩ ±10% resistor must be
connected from the Rbias pin to VDD. This circuit is designed to operate in smoke
detector systems that comply with UL217 and UL268 specifications.
Features
• Applications:
Pulse Shapers
Threshold Detectors
Low-Battery Detectors
Line-Powered Smoke Detectors
Liquid/Moisture Sensors
CO Detector and Micro Interface
• Operating Voltage Range: 3.5 to 14 V
• Operating Temperature Range: -30° to 70°C
• Input Current (IN + Pin): ±1 pA @ 25°C (DIP Only)
• Quiescent Current: 10 µA @ 25°C
• Electrostatic Discharge (ESD) Protection Circuitry on All Pins
Device
MC14578P
ORDERING INFORMATION
Temperature
Range
Case No.
-30° to 70°C
648-08
Package
Plastic Dip
MC14578
CMOS
MICRO-POWER COMPARATOR
PLUS VOLTAGE FOLLOWER
P SUFFIX
PLASTIC DIP
CASE 648-08
VDD
Comp OUT
IN A
IN B
OUT A
OUT B
IN C
OUT C1
1
2
3
4
5
6
7
8
16 NC
15 IN +
14 NC
13 Buff OUT
12 IN–
11 Rbias
10 VSS
9 OUT C2
Figure 1. Pin Connections
© Freescale Semiconductor, Inc., 2005. All rights reserved.
1 page  
-A-
16
1
H
G
PACKAGE DIMENSIONS
9
B
8
FC
S
L
-T-
SEATING
PLANE
KJ
D 16 PL
0.25 (0.010) M T A M
M
STYLE 1:
PIN 1. CATHODE
2. CATHODE
3. CATHODE
4. CATHODE
5. CATHODE
6. CATHODE
7. CATHODE
8. CATHODE
9. ANODE
10. ANODE
11. ANODE
12. ANODE
13. ANODE
14. ANODE
15. ANODE
16. ANODE
STYLE 2:
PIN 1. COMMON DRAIN
2. COMMON DRAIN
3. COMMON DRAIN
4. COMMON DRAIN
5. COMMON DRAIN
6. COMMON DRAIN
7. COMMON DRAIN
8. COMMON DRAIN
9. GATE
10. SOURCE
11. GATE
12. SOURCE
13. GATE
14. SOURCE
15. GATE
16. SOURCE
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.
INCHES MILLIMETERS
DIM MIN MAX MIN MAX
A 0.740 0.770 18.80 19.55
B 0.250 0.270 6.35 6.85
C 0.145 0.175 3.69 4.44
D 0.015 0.021 0.39 0.53
F 0.040 0.70 1.02 1.77
G 0.100 BSC
2.54 BSC
H 0.050 BSC
1.27 BSC
J 0.008 0.015 0.21 0.38
K 0.110 0.130 2.80 3.30
L 0.295 0.305 7.50 7.74
M0
10 0
10
S 0.020 0.040 0.51 1.01
CASE 648-08
ISSUE R
16-LEAD PLASTIC DIP
Sensors
Freescale Semiconductor
MC14578
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MC14578.PDF ] | |
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