TCM809JVNB713 Microchip Technology, TCM809JVNB713 Datasheet - Page 5

• Manufacturer Part Number: TCM809JVNB713
• Description: IC RESET MONITOR 4.00V SOT23B-3
• Manufacturer: Microchip Technology
• Type: Simple Reset/Power-On Resetr

Specifications of TCM809JVNB713

• Number Of Voltages Monitored: 1
• Output: Push-Pull, Totem Pole
• Reset: Active Low
• Reset Timeout: 140 ms Minimum
• Voltage - Threshold: 4V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-3, TO-236-3, Micro3™, SSD3, SST3
• Threshold Voltage: 4V
• No. Of Supervisors / Monitors: 1
• Supply Voltage Range: 1.2V To 5.5V
• Reset Type: Active-Low
• Supply Current: 12µA
• Delay Time: 320ms
• Digital Ic Case Style: SOT-23
• Monitored Voltage: 2.5 V, 3 V, 3.3 V, 5 V
• Output Type: Active Low, Push-Pull
• Manual Reset: Not Resettable
• Watchdog: No Watchdog
• Battery Backup Switching: No Backup
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1 V
• Supply Current (typ): 12 uA
• Maximum Power Dissipation: 320 mW
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Power Fail Detection: No
• Undervoltage Threshold: 3.93 V
• Overvoltage Threshold: 4.06 V
• Power-up Reset Delay (typ): 560 ms
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: TCM809JVNB713; TCM809JVNB713TR

3.0
3.1
The TCM809/TCM810 provides accurate V
ing and reset timing during power-up, power-down and
brown-out/sag conditions. These devices also reject
negative-going transients (glitches) on the power sup-
ply line. Figure 3-1 shows the maximum transient dura-
tion vs. maximum negative excursion (overdrive) for
glitch rejection. Any combination of duration and over-
drive that lies under the curve will not generate a reset
signal.
FIGURE 3-1:
Duration vs. Overdrive for Glitch Rejection at
+25°C.
 2004 Microchip Technology Inc.
130
120
110
100
90
80
70
60
50
40
30
1
APPLICATIONS INFORMATION
V
400
320
240
160
80
DD
0
V
1
TCM8XXZ/R/S/T
Reset Comparator Overdrive (mV)
(SOT-23)
Transient Rejection
DD
T
A
Reset Comparator Overdrive
= +25°C
[V
10
Maximum Transient
Duration
TH
[V
5
TCM8XXL/M/J (SOT-23)
TH
- V
- V
DD
TCM8XXZ/R/S/T (SC-70)
] (mv)
DD
TCM8XXL/M/J (SC-70)
] (mv)
Overdrive
V
100
TH
100
DD
1000
monitor-
1000
Combinations above the curve are detected as a
brown-out or power-down condition. Transient immu-
nity can be improved by adding a capacitor in close
proximity to the V
3.2
The TCM809 RESET output is valid to V
Below this voltage the output becomes an "open cir-
cuit" and does not sink current. This means CMOS
logic inputs to the microcontroller will be floating at an
undetermined voltage. Most digital systems are
completely shut down well above this voltage.
However, in situations where RESET must be main-
tained valid to V
connected from RESET to ground to discharge stray
capacitances and hold the output low (Figure 3-2). This
resistor value, though not critical, should be chosen
such that it does not appreciably load RESET under
normal operation (100 k
applications). Similarly, a pull-up resistor to V
required for the TCM810 to ensure a valid high RESET
for V
FIGURE 3-2:
RESET output of the TCM809 ensures that the
RESET output is valid to V
DD
below 1.0V.
RESET Signal Integrity During
Power-Down
TCM809/TCM810
TCM809
DD
DD
GND
V
V
= 0V, a pull-down resistor must be
DD
DD
RESET
pin of the TCM809/TCM810.
The addition of R
will be suitable for most
DD
= 0V.
R
100 k
1
DS21661C-page 5
1
DD
at the
= 1.0V.
DD
is