DS1233M-5+ ,EconoResetFEATURES PIN ASSIGNMENT Automatically restarts microprocessor afterpower failure DALLASDS12331 8 N ..
DS1233M-5+ ,EconoResetPIN DESCRIPTIONSTO-921 RST - Active Low Reset Output2 V - Power SupplyCC 3 GND - Ground8-Pin SOICRS ..
DS1233M-55 ,EconoResetDS1233MDS1233MEconoReset
DS1233M-55 ,EconoResetPIN DESCRIPTIONSTO–921 RST – Active Low Reset Output2V – Power SupplyCC3 GND – Ground8–Pin SOICRST ..
DS1233Z+10 ,5V EconoResetDS12335V EconoReset
DS1233Z-10 ,5V EconoResetPIN DESCRIPTIONPIN 1 GROUNDPIN 2 RESETPIN 3 VCCPIN 4 GROUND (SOT-223 ONLY)DESCRIPTIONThe DS1233 Eco ..
DTA144EET1 ,Bias Resistor TransistorELECTRICAL CHARACTERISTICS (T = 25°C unless otherwise noted)ACharacteristic Symbol Min Typ Max Unit ..
DTA144EET1G , Digital Transistors (BRT) R1 = 47 k, R2 = 47 k
DTA144EKA T146 , PNP -100mA -50V Digital Transistors
DTA144EKA T146 , PNP -100mA -50V Digital Transistors
DTA144EKAT146 , PNP -100mA -50V Digital Transistors
DTA144EKAT146 , PNP -100mA -50V Digital Transistors
DS1233M-5+
EconoReset
FEATURESAutomatically restarts microprocessor after
power failureMaintains reset for 350 ms after VCC returns
to an in-tolerance conditionReduces need for discrete componentsPrecision temperature-compensated voltage
reference and voltage sensorLow-cost TO-92 package or surface mount
8-pin SOIC packages availableInternal 5 k� pullup resistorCompatible with Motorola 68XXX seriesand HC16 MicroprocessorsPin function compatible with the Motorola
MC33064, MC34064, MC33164, and
MC34164Operating temperature of -40°C to +85°C
PIN ASSIGNMENT 1 2 3
PIN DESCRIPTIONS
TO-92RST- Active Low Reset Output2 VCC - Power Supply
3 GND - Ground
8-Pin SOICRST - Active Low Reset Output
VCC - Power SupplyNC - No Connect
GND - Ground
DESCRIPTIONThe DS1233M EconoReset uses a precision temperature-compensated reference and comparator circuit to
monitor the status of the power supply (VCC). When an out-of-tolerance condition is detected, an internal
power-fail signal is generated which forces reset to the active (low) state. When VCC returns to an
DS1233M
EconoResetRST
VCC
GND
DS1233M 8-Pin SOIC
(150mil)
See Mech. Drawings
Section on Website
TO-92 PACKAGE
See Mech.
Drawings Section
On Website
DS1233M
OPERATION - POWER MONITORThe DS1233M provides the functions of detecting out-of-tolerance power supply conditions and warning
a processor-based system of impending power failure. When VCC is detected as out-of-tolerance, as
defined by the tolerance of the part selected, the RST signal is asserted. On power-up, RSTis kept active
for approximately 350 ms after the power supply has reached the selected tolerance. This allows the
power supply and microprocessor to stabilize before RST is released.
BLOCK DIAGRAM Figure 1
APPLICATION EXAMPLE Figure 2
DS1233M
TIMING DIAGRAM: POWER-UP Figure 3
VOLTAGE TRIP LEVELS
TIMING DIAGRAM: POWER-DOWN Figure 4
DS1233M
ABSOLUTE MAXIMUM RATINGS*Voltage on VCC Pin Relative to Ground -0.5V to +7.0V
Voltage on I/O Relative to Ground -0.5V to VCC + 0.5V
Operating Temperature -40°C to +85°C
Storage Temperature -55°C to +125°C
Soldering Temperature 260°C for 10 secondsThis is a stress rating only and functional operation of the device at these or any other conditions
above those indicated in the operation sections of this specification is not implied. Exposure to
absolute maximum rating conditions for extended periods of time may affect reliability.
RECOMMENDED DC OPERATING CONDITIONS (-40°C to +85°C)
DC ELECTRICAL CHARACTERISTICS (-40°C to +85°C; VCC = 1.2V to 5.5V)
AC ELECTRICAL CHARACTERISTICS (-40°C to +85°C; VCC = 1.2V to 5.5V)
NOTES:1. All voltages are referenced to ground.
2. Measured with VCC � 2.7V.
3. A 1 k��external resistor may be required in some applications for proper operation of themicroprocessor reset control circuit.
4. Measured with outputs open.
5. tR = 5 �s.
:
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