MAX6306UK30D1+T Maxim Integrated Products, MAX6306UK30D1+T Datasheet - Page 6

• Manufacturer Part Number: MAX6306UK30D1+T
• Description: IC PROGRAM 3.000V RESET SOT23-5
• Manufacturer: Maxim Integrated Products
• Type: Multi-Voltage Supervisorr

Specifications of MAX6306UK30D1+T

• Number Of Voltages Monitored: 2
• Output: Open Drain or Open Collector
• Reset: Active Low
• Reset Timeout: 1 ms Minimum
• Voltage - Threshold: 3V, Adj
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Monitored Voltage: 3.3 V, 5 V
• Undervoltage Threshold: 2.955 V
• Overvoltage Threshold: 3.045 V
• Output Type: Active Low, Open Drain
• Manual Reset: Resettable
• Watchdog: No Watchdog
• Battery Backup Switching: No Backup
• Power-up Reset Delay (typ): 1.4 ms
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1 V
• Supply Current (typ): 8 uA
• Maximum Power Dissipation: 571 mW
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• Power Fail Detection: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

5-Pin, Multiple-Input,
Programmable Reset ICs
Figure 1. Functional Diagram
6
RST IN1
RST IN2
†††
***
††
**
MR
†
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
*
MAX6306/MAX6307/MAX6309/MAX6310/MAX6312/MAX6313 ONLY
MAX6305–MAX6310 ONLY
MAX6311/MAX6312/MAX6313 ONLY
MAX6307/MAX6310/MAX6313 ONLY
MAX6305/MAX6308/MAX6311 ONLY
MAX6306/MAX6309/MAX6312 ONLY
+1.23V
+1.23V
V
CC
*
††
GND
MAX6305–MAX6313
†
+1.23V
GENERATOR
RESET
†††
V
CC
+1.23V
RESET**
RESET***
OVRST IN
open-drain, N-channel output. The MAX6308/MAX6309/
MAX6310 feature an active-low, complementary output
structure that both sinks and sources current, and the
MAX6311/MAX6312/MAX6313 have an active-high com-
plementary reset output.
The MAX6305/MAX6308/MAX6311 switch from under-
voltage lockout operation to normal operation between
1.5V < V
lockout mode asserts RESET. Above 2.5V, V
operation mode asserts reset if RST IN_ falls below the
RST IN_ threshold.
Many µP-based products require manual-reset capability,
allowing an operator or external logic circuitry to initiate a
reset. A logic low on MR asserts reset. Reset remains
asserted while MR is low, and for a reset active timeout
period (t
nal 63.5kΩ pull-up resistor, so it can be left open if it is not
used. MR can be driven with TTL-logic levels in 5V sys-
tems, with CMOS-logic levels in 3V systems, or with open-
drain/collector output devices. Connect a normally open
momentary switch from MR to GND to create a manual-
reset function; external debounce circuitry is not required.
If MR is driven from long cables or if the device is used in
a noisy environment, connecting a 0.1µF capacitor from
MR to ground provides additional noise immunity.
The MR pin has internal ESD-protection circuitry that may
be forward biased under certain conditions, drawing
excessive current. For example, assume the circuitry driv-
ing MR uses a +5V supply other than V
browns out lower than +4.7V, MR’s absolute maximum rat-
ing is violated (-0.3V to (V
current flows through the ESD structure from MR to V
To avoid this, it is recommended that the supply for the MR
pin be the same as the supply monitored by V
way, the voltage at MR will not exceed V
The MAX6305–MAX6313 each have one or more reset
inputs (RST IN_ /OVRST IN). These inputs are com-
pared to the internal reference voltage (Figure 1).
Connect a resistor voltage divider to RST IN_ such that
V
voltage (V
(V
with the following formula:
RST IN_
TH
) (Figure 2). Calculate the desired reset voltage
RP
falls below V
CC
) after MR returns high. This input has an inter-
IN
) falls below the desired reset threshold
< 2.5V. Below 1.5V, V
(MAX6306/MAX6309/MAX6312)
V
TH
= ________ x V
RSTH
R1 + R2
Adjustable Reset Inputs
R2
CC
(1.23V) when the monitored
+ 0.3V)), and undesirable
Manual-Reset Input
RSTH
CC
CC
CC
. If V
.
undervoltage-
CC
CC
CC
drops or
normal-
. In this
CC
.