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 ..
DS1233Z-10 ,5V EconoResetFEATURES PIN ASSIGNMENT Automatically restarts microprocessor afterpower failureDALLASDS1233 Moni ..
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-3-DS1233M-5-DS1233M-55
EconoReset
DS1233MEconoReset
DS1233M
022698 1/4
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 refer-
ence and voltage sensorLow-cost TO-92 package or surface mount 8–pin
SOIC packages availableInternal 5 KΩ pull-up resistorCompatible with Motorola 68XXX series and HC16
MicroprocessorsPin function compatible with the Motorola MC33064,
MC34064, MC33164, and MC34164Operating temperature of –40°C to +85°C
PIN ASSIGNMENT323
DS1233M
TO-92 Package
See Mech. Drawings
Section
RST
VCC
GND
DS1233M 8–PIN SOIC
(150 MIL)
See Mech. Drawings
Section
PIN DESCRIPTIONS
TO–92RST–Active Low Reset Output
2VCC–Power SupplyGND–Ground
8–Pin SOICRST–Active Low Reset Output
VCC–Power Supply–No Connect
GND–Ground
DESCRIPTIONThe DS1233M EconoReset uses a precision tempera-
ture 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 in-tolerance condi-
tion, the reset signal is kept in the active state for ap-
proximately 350 ms to allow the power supply and pro-
cessor to stabilize.
DS1233M
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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, RST is kept active for approxi-
mately 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 1GROUND
RST
VCC
5KΩ
APPLICATION EXAMPLE Figure 2CC
VCC
RST
DS1233M
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TIMING DIAGRAM: POWER UP Figure 3VCC
RST
VOLTAGE TRIP LEVELS
TIMING DIAGRAM: POWER DOWN Figure 4
DS1233M
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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 Temperature260°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:All voltages are referenced to ground.Measured with VCC 2.7V.A 1KΩ external resistor may be required in some applications for proper operation of the microprocessor
reset control circuit.Measured with outputs open.tR = 5 μs.
This datasheet has been :
www.ic-phoenix.com
Datasheets for electronic components.
