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PDF MC33164 Data sheet ( Hoja de datos )
| Número de pieza | MC33164 | |
| Descripción | MICROPOWER UNDERVOLTAGE SENSING CIRCUITS | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
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Order this document by MC34164/D
Micropower Undervoltage
Sensing Circuits
The MC34164 series are undervoltage sensing circuits specifically
designed for use as reset controllers in portable microprocessor based
systems where extended battery life is required. These devices offer the
designer an economical solution for low voltage detection with a single
external resistor. The MC34164 series features a bandgap reference, a
comparator with precise thresholds and built–in hysteresis to prevent erratic
reset operation, an open collector reset output capable of sinking in excess
of 6.0 mA, and guaranteed operation down to 1.0 V input with extremely 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 3.0 or 5.0 V MPU/logic power
supply used in appliance, automotive, consumer, and industrial equipment.
• Temperature Compensated Reference
• Monitors 3.0 V (MC34164–3) or 5.0 V (MC34164–5) Power Supplies
• Precise Comparator Thresholds Guaranteed Over Temperature
• Comparator Hysteresis Prevents Erratic Reset
• Reset Output Capable of Sinking in Excess of 6.0 mA
• Internal Clamp Diode for Discharging Delay Capacitor
• Guaranteed Reset Operation With 1.0 V Input
• Extremely Low Standby Current: As Low as 9.0 µA
• Economical TO–226AA, SO–8 and Micro–8 Surface Mount Packages
MC34164
MC33164
MICROPOWER
UNDERVOLTAGE
SENSING CIRCUITS
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
DM SUFFIX
PLASTIC PACKAGE
CASE 846A
(Micro–8)
8
1
Representative Block Diagram
Input 2 (2)
Reset
1 (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 28 active transistors.
MOTOROLA ANALOG IC DEVICE DATA
ORDERING INFORMATION
Device
Operating
Temperature Range Package
MC34164D–3
MC34164D–5
MC34164DM–3
MC34164DM–5
MC34164P–3
MC34164P–5
MC33164D–3
MC33164D–5
MC33164DM–3
MC33164DM–5
MC33164P–3
MC33164P–5
TA = 0° to +70°C
TA = –40° to +125°C
SO–8
Micro–8
TO–226AA
SO–8
Micro–8
TO–226AA
© Motorola, Inc. 1996
Rev 1
1
1 page  
MC34164 MC33164
Figure 9. MC3X164–3 Reset Output
Saturation versus Sink Current
4.0
Vin = 2.4 V
3.0
2.0 TA = 25°C
TA = 70°C
TA = 0°C
TA = 25°C
TA = 0°C
1.0
TA = 70°C
0
0 4.0 8.0 12 16
VSink, SINK CURRENT (mA)
20
Figure 10. MC3X164–5 Reset Output
Saturation versus Sink Current
4.0
Vin, Reset = 4 V
3.0
TA = 25°C
TA = 70°C
TA = 0°C
TA = 25°C
2.0
TA = 0°C
1.0
TA = 70°C
0
0 4.0 8.0 12 16
ISink, SINK CURRENT (mA)
20
Figure 11. Clamp Diode Forward Current
versus Voltage
32
24
Vin = 0 V
TA = 25°C
16
8.0
0
0 0.4 0.8 1.2 1.6
VF , FORWARD VOLTAGE (V)
Figure 12. Reset Delay Time
(MC3X164–5 Shown)
Reset
90%
Vin
5.0 V
4.0 V
Vin
5.0V
10 4.0V
%
Ref
Vin = 5.0 V to 4.0 V
RL = 43 k
TA = 25°C
43k
Reset
5.0 µs/DIV
Figure 13. Low Voltage Microprocessor Reset
Power
Supply
2 (2)
R
Reset
1 (1)
CDLY
Microprocessor
Circuit
1.2 Vref
3 (4)
ǒtDLY = RCDLY In
1–
1
ǓVth(MPU)
Vin
A time delayed reset can be accomplished with the addition of CDLY. For systems with extremely fast power
supply rise times (< 500 ns) it is recommended that the RCDLY time constant be greater than 5.0 µs. Vth(MPU) is
the microprocessor reset input threshold.
MOTOROLA ANALOG IC DEVICE DATA
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MC33164.PDF ] | |
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