DS1834

Maximum Power Dissipation :
Battery Backup Switching : No Backup
Supply Voltage - Max : 5.5 V
Maximum Operating Temperature : + 85 C
Output Type : Active Low, Open Drain
Manual Reset : Resettable
Watchdog : No Watchdog
Number of Voltages Monitored : 2
Packaging : Tube
Mounting Style : Through Hole
Package / Case : PDIP-8
Supply Voltage - Min : 1.2 V
Power-Up Reset Delay (Typ) : 500 ms
Supply Current (Typ) : 50 uA
Monitored Voltage : 3.3 V, 5 V
Undervoltage Threshold : 4.5 V, 2.8 V
Overvoltage Threshold : 4.75 V, 2.97 V


Features:

 5-volt power-on reset
3.3-volt power-on reset
Internal power is drawn from higher of either the 5V_IN input or the 3.3V_IN input
Excellent for systems designed to operate with dual power supplies
Asserts resets during power transients
Pushbutton reset input for system override
Maintains reset for 350 ms after V_CC returns to an in-tolerance condition
Reduces need for discrete components
Precision temperature-compensated voltage reference and voltage sensor
8-pin DIP, 8-pin SOIC, and 8-pin µ-SOP available
CMOS output for low current operation on the DS1834 and DS1834D
Operating temperature of -40°C to +85°C


Pinout




Specifications

Voltage on V_IN Pin Relative to Ground                                             -0.5V to +7.0V
Voltage on RST (5V) Pin Relative to Ground                                     -0.5V to +0.5V_IN + 0.5V (DS1834 & DS1834D)
Voltage on RST (3.3V) Pin Relative to Ground                                  -0.5V to +3.3V_IN + 0.5V (DS1834 & DS1834D)
Voltage on PBRST & RST (DS1834A) Pin Relative to Ground            -0.5 to the greater of 0.5V_IN + 0.5V or 3V_IN + 0.5V
Operating Temperature                                                                   -40°C to +85°C
Storage Temperature                                                                      -55°C to +125°C
Soldering Temperature                                                                    260°C for 10 seconds


Description

The DS1834 Dual EconoResets monitors three vital system conditions: 5-volt supply, 3.3-volt supply, and an external override. First a precision temperature reference and comparator circuit monitor the status of the 5-volt supply and the 3.3-volt supply. When an out-of-tolerance condition is detected, an internal power-fail signal is generated which forces the reset of the affected supply to an active state.

Lastly, the DS1834 supports an external reset via an internally debounced pushbutton input. When the pushbutton is pulled low both resets will be asserted for approximately 350 ms after the pushbutton is released.

Parameters:

Technical/Catalog Information	DS1834
Vendor	Dallas Semiconductor
Category	Integrated Circuits (ICs)
Output	Open Drain or Open Collector
Reset	Active Low
Package / Case	8-DIP
Packaging	Tube
Number of Voltages Monitored	2
Reset Timeout	200 ms Minimum
Type	Multi-Voltage Supervisor
Voltage - Threshold	3.3V, 5V
Operating Temperature	-40°C ~ 85°C
Lead Free Status	Contains Lead
RoHS Status	RoHS Non-Compliant
Other Names	DS1834 DS1834