MAX708T |
RFQ for MAX708T Required Field |
 |
| Technical/Catalog Information | MAX708TCPA+ |
| Vendor | Maxim Integrated Products |
| Category | Integrated Circuits (ICs) |
| Output | Push-Pull, Totem Pole |
| Reset | Active High/Active Low |
| Package / Case | 8-DIP (300 mil) |
| Packaging | Tube |
| Number of Voltages Monitored | 1 |
| Reset Timeout | 140 ms Minimum |
| Type | Simple Reset/Power-On Reset |
| Voltage - Threshold | 3.08V |
| Operating Temperature | 0°C ~ 70°C |
| Drawing Number | 175; 21-0043; PA; 8 |
| Lead Free Status | Lead Free |
| RoHS Status | RoHS Compliant |
| Other Names | MAX708TCPA+ MAX708TCPA+ |
| Product | Manufacturers | Pack | D/C |
| MAX708T | - | SOP-8 | 04/05 |
Figures 1-34 and 1-35 show a typical application circuit and pin configurations, respectively, for the MAX706P/R/S/T. Figures 1-36 and 1-37 show a typical application, circuit and pin configuration; respectively, for the MAX708R/S/T The ICs are similar to that described for Figs. 1-J through 1-M, but with the capability of monitoring +3-V supply levels. The ICs have a 200-ms reset pulse width, 100-pA quiescent current, a watchdog with 1.6-s timeout, and a 1.25-V threshold detector for power-fail warning, low-battery detection, or for monitoring supply levels in the +3-V to +5;V range. The difference among the MAX706R,S, and T is the reset-threshold levels, which are 2.63 V, 2.93 V and 3.08 V, respectively. All have active-low reset output signals. The MAX706P reset output is active-high with a 2.63-V threshold. The MAX708R/S/T are identical to the corresponding MAX706, except that the MAX708 series does not have a watchdog, but provides both RESET and RESET outputs. The watchdog is activated when the WDI input has not been toggled within 1,6 s. All of the ICs have an active-low manual reset.
MAXIM HIGH-RELIABILITY DATA Book, 1993, P. 5-33, 5-34.
The MAX708R/S/T are microprocessor supervisory circuits used to monitor +3 V power supply levels in +3 V to +5 V microprocessor and other logic systems. The R, S, T suffixes have reset thresholds of 2.63 V, 2.93 V and 3.08 V, respectively. They reduce the number of circuit components, and improve reliability and accuracy compared to using separate ICs or discrete components.
The MAX708R/S/T features make the MAX708R/S/T ideal for use in portable, battery operated equipment. The low supply current,typically 50 A, minimizes battery load. Both RESET and RESET are active during power-up, power-down and brownout conditions An active-LOW manual reset input is also available.
A 1.25 V threshold detector provides power-fail warning. This independent comparator can be used to monitor a second voltage supply and provide an early warning to the microprocessor that voltage is falling. This allows for an orderly shutdown, transmitting an alert to an operator, or activation of an alternate power source before the device asserts the reset signals.
The device is available in the 8-pin SO package.
Typical Application |
Features |
| • Battery powered devices• Critical microprocessor monitoring• Controllers• Portable instruments | • RESET andRESET signals• Independent comparator with 1.25 V threshold for power failure or low battery warning• Manual reset input• 50 A quiescent current• Reset thresholds of 2.63, 2.93, and 3.08 V• Guaranteed RESET assertion to VCC = 1 V |
|
SYMBOL |
PARAMETER |
CONDITIONS |
Min |
Max |
Unit |
|
VCC |
Supply voltage |
-0.3 |
6.0 |
V | |
|
Vn |
Other input pin voltage |
Note 1 |
-0.3 |
VCC+0.3 |
V |
| Input current at VCC or GND |
- |
20 |
mA | ||
| Output current, all outputs |
- |
20 |
mA | ||
| Rate of rise at VCC |
- |
100 |
V/s | ||
|
Topr |
Operating temperature |
-40 |
+85 |
°C | |
