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PDF MC34064 Data sheet ( Hoja de datos )
| Número de pieza | MC34064 | |
| Descripción | (MC33064 / MC34064) UNDERVOLTAGE SENSING CIRCUIT | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MC34064 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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Undervoltage Sensing Circuit
The MC34064 is an undervoltage sensing circuit specifically designed for
use as a reset controller in microprocessor-based systems. It offers the
designer an economical solution for low voltage detection with a single
external resistor. The MC34064 features a trimmed-in-package bandgap
reference, and a comparator with precise thresholds and built-in hysteresis
to prevent erratic reset operation. The open collector reset output is capable
of sinking in excess of 10 mA, and operation is guaranteed down to 1.0 V
input with low standby current. These devices are packaged in 3-pin
TO-226AA, 8-pin SO–8 and Micro–8 surface mount packages.
Applications include direct monitoring of the 5.0 V MPU/logic power
supply used in appliance, automotive, consumer and industrial equipment.
• Trimmed-In-Package Temperature Compensated Reference
• Comparator Threshold of 4.6 V at 25°C
• Precise Comparator Thresholds Guaranteed Over Temperature
• Comparator Hysteresis Prevents Erratic Reset
• Reset Output Capable of Sinking in Excess of 10 mA
• Internal Clamp Diode for Discharging Delay Capacitor
• Guaranteed Reset Operation with 1.0 V Input
• Low Standby Current
• Economical TO–226AA, SO–8 and Micro–8 Surface Mount Packages
Order this document by MC34064/D
MC34064
MC33064
UNDERVOLTAGE
SENSING CIRCUIT
SEMICONDUCTOR
TECHNICAL DATA
P SUFFIX
PLASTIC PACKAGE
CASE 29
(TO–226AA)
123
Pin 1. Reset
2. Input
3. Ground
D SUFFIX
PLASTIC PACKAGE 8
CASE 751
(SO–8)
1
Representative Block Diagram
Input 2 (2)
Reset
1 (1)
DM SUFFIX
PLASTIC PACKAGE
CASE 846A
(Micro–8)
8
1
Reset 1
Input 2
N.C. 3
Ground 4
8 N.C.
7 N.C.
6 N.C.
5 N.C.
(Top View)
1.2 Vref
Gnd 3 (4)
=
Sink Only
Positive True Logic
Pin numbers adjacent to terminals are for the 3–pin TO–226AA package.
Pin numbers in parenthesis are for the 8–lead packages.
This device contains 21 active transistors.
MOTOROLA ANALOG IC DEVICE DATA
ORDERING INFORMATION
Device
Operating
Temperature Range Package
MC34064D–5
MC34064DM–5
MC34064P–5
TA = 0° to +70°C
SO–8
Micro–8
TO–226AA
MC33064D–5
SO–8
MC33064DM–5 TA = – 40° to +85°C Micro–8
MC33064P–5
TO–226AA
© Motorola, Inc. 1996
Rev 2
1
1 page  
Figure 10. Voltage Monitor
+
Power
Supply
–
2 (2)
–
+
1.2Vref
MC34064 MC33064
Figure 11. Solar Powered Battery Charger
+
1.0k
– 2 (2)
1 (1) 1 (1)
–
Solar
+ Cells
1.2Vref
3 (4) 3 (4)
Vin = 11.5
to 14.5V
+
470
4.7k
2 (2)
22
+
330
–
+
1.2Vref
Figure 12. Low Power Switching Regulator
MPSW51A
680
1.2k
25µH
470
1N5819
+
VO = 5.0 V
IO = 50 mA
1N756
1 (1)
Test
Line Regulation
Load Regulation
Output Ripple
Efficiency
Conditions
Results
Vin = 11.5 V to 14.5 V, IO = 50 mA
Vin = 12.6 V, IO = 0 mA to 50 mA
Vin = 12.6 V, IO = 50 mA
Vin = 12.6 V, IO = 50 mA
35 mV
12 mV
60 mVpp
77%
3 (4)
Figure 13. MOSFET Low Voltage Gate Drive Protection
VCC
RL
MTP3055EL
270
4.6V
2 (2)
–
+
1.2Vref
1 (1)
3 (4)
Overheating of the logic level power MOSFET due to insufficient gate voltage can be prevented with the above
circuit. When the input signal is below the 4.6 V threshold of the MC34064, its output grounds the gate of the L2
MOSFET.
MOTOROLA ANALOG IC DEVICE DATA
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MC34064.PDF ] | |
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