MIC2772-M3S3YML TR Micrel Inc, MIC2772-M3S3YML TR Datasheet - Page 7

• Manufacturer Part Number: MIC2772-M3S3YML TR
• Description: Reset Generator, 4.38V / 140ms - 4.38V / 140ms ( )
• Manufacturer: Micrel Inc
• Type: Multi-Voltage Supervisorr

Specifications of MIC2772-M3S3YML TR

• Number Of Voltages Monitored: 2
• Output: Open Drain, Open Drain
• Reset: Active Low
• Reset Timeout: 140 ms Minimum
• Voltage - Threshold: 4.38V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-MLF®, QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MIC2772-M3S3YMLTR; MIC2772-M3S3YMLTR

The MIC2772 is inherently immune to very short
“glitches” on VCC.
transients, VCC may drop below the reset-voltage
threshold without triggering a reset. As shown in the
graph, the MIC2772 is relatively immune to
transients with typical duration of 25us. The lines on
the graph represent the typical allowable transient
duration for a given amount of threshold overdrive
that will not generate a reset. The data was taken by
adding negative-going square-wave pulse to a DC
input voltage set at 0.5V above actual measured
threshold for the part being characterized. Figure 1
shows the graph for the MIC2772[UP3] and Figure 2
shows the graph for the MIC2772[UP5]
Interfacing to Processors with Bi-directional
Reset Pins
Some microprocessors have reset signal pins that
are bi-directional, rather than input only. The
Transients on VCC
Micrel
April 2005
RESET COMP. OVERDRIVE V
RESET COMP. OVERDRIVE V
35
30
25
20
15
10
40
35
30
25
20
15
10
5
0
5
0
0
0
V
V
TH
TH
= 4.393V
= 2.933V
200
200
Typical Transient
Typical Transient
Figure 1
Figure 2
Response
Response
400
400
In the case of very brief
600
600
800
800
TH
TH
- V
- V
1000
1000
CC
CC
(mV)
(mV)
7
Motorola 68HC11 family is one example. Because
the MIC2772’s output is active-low, open-drain, it
can be connected directly to the processor’s reset
pin with only the pull-up resistor normally required.
MIC2772 Replaces Single Supervisor
The table below lists common single voltage
supervisors that can be considered for replacement
by MIC2772.
P/N Suffix
M2M3
M3M3
M3S3
T3T3
S3S3
T2T3
S2S3
L2L3
L3L3
L3T3
MIC809S, MIC811S
MIC809T, MIC811T
MIC809L, MIC811L
MIC809L, MIC811L
MIC6315-46D3,
MIC6315-44D3,
MIC6315-31D3,
MIC6315-29D3,
MIC6315-46D3,
MIC6315-44D3,
MIC6315-46D2
MIC6315-44D2
MIC6315-31D2
MIC6315-29D2
Supervisor #1
MIC1810-10,
MIC1815-10,
MIC1810-10,
MIC1810-5,
MIC1810-5,
MIC809M,
MIC809M,
MIC811M
MIC811M
MIC809T, MIC811T
MIC809S, MIC811S
MIC809T, MIC811T
MIC809S, MIC811S
MIC809T, MIC811T
MIC809S, MIC811S
MIC809L, MIC811L
MIC809L, MIC811L
MIC6315-46D3,
MIC6315-44D3,
MIC6315-46D3,
MIC6315-44D3,
MIC6315-31D3,
MIC6315-29D3,
MIC6315-31D3,
MIC6315-29D3,
MIC6315-31D3,
MIC6315-29D3,
Supervisor #2
MIC1810-10,
MIC1810-10,
MIC1815-10,
MIC1815-10,
MIC1815-10,
[phone]
M9999-042605
MIC1810-5,
MIC1810-5,
MIC809M,
MIC809M,
MIC811M
MIC811M
MIC2772