MAX6315US47D4+T [MAXIM]
Power Supply Support Circuit, Fixed, 1 Channel, +4.7VV, CMOS, PDSO4, LEAD FREE, TO-253, SOT-143, 4 PIN;
| 型号： | MAX6315US47D4+T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Power Supply Support Circuit, Fixed, 1 Channel, +4.7VV, CMOS, PDSO4, LEAD FREE, TO-253, SOT-143, 4 PIN 复位电路 |
| 文件： | 总8页 (文件大小：115K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-2000; Rev 1; 1/99
Op e n -Dra in S OT µP Re s e t Circ u it
MAX6315
________________Ge n e ra l De s c rip t io n
____________________________Fe a t u re s
The MAX6315 low-power CMOS microprocessor (µP)
supervisory circuit is designed to monitor power sup-
plies in µP and digital systems. It provides excellent cir-
c uit re lia b ility a nd low c os t b y e limina ting e xte rna l
components and adjustments. The MAX6315 also pro-
vides a debounced manual reset input.
♦ Small SOT143 Package
♦ Open-Drain RESET Output Can Exceed V
CC
♦ Precision, Factory-Set V
Reset Thresholds:
CC
100mV Increments from 2.5V to 5V
♦ ±1.8% Reset Threshold Accuracy at T = +25°C
A
This device performs a single function: it asserts a reset
signal whenever the V
supply voltage falls below a
♦ ±2.5% Reset Threshold Accuracy Over Temp.
CC
preset threshold or whenever manual reset is asserted.
Reset remains asserted for an internally programmed
♦ Four Reset Timeout Periods Available:
1ms, 20ms, 140ms, or 1120ms (minimum)
interval (reset timeout period) after V has risen above
CC
the reset threshold or manual reset is deasserted. The
♦ Immune to Short V
Transients
CC
MAX6315’s open-drain RESET output can be pulled up
♦ 5µA Supply Current
to a voltage higher than V
.
CC
♦ Pin-Compatible with MAX811
The MAX6315 comes with factory-trimmed reset thresh-
old voltages in 100mV increments from 2.5V to 5V.
Pre s e t time out p e riod s of 1ms , 20ms , 140ms , a nd
1120ms (minimum) a re a ls o a va ila b le . The d e vic e
comes in a SOT143 package.
For microcontrollers (µCs) and µPs with bidirectional
reset pins, see the MAX6314 data sheet.
Ordering and Marking Information appear at end of
data sheet.
________________________Ap p lic a t io n s
Computers
Controllers
Intelligent Instruments
Critical µP and µC Power Monitoring
Portable/Battery-Powered Equipment
__________Typ ic a l Op e ra t in g Circ u it
V
CC
__________________P in Co n fig u ra t io n
V
CC
LASER-
TRIMMED
RESISTORS
TOP VIEW
1
4
GND
V
CC
µP
MAX6315
RESET
RESET
RESET
CIRCUITRY
MR
RESET
2
3
MR
MAX6315
GND
SOT143
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Op e n -Dra in S OT µP Re s e t Circ u it
ABSOLUTE MAXIMUM RATINGS
V
CC
........................................................................-0.3V to +6.0V
Continuous Power Dissipation (T = +70°C)
A
RESET....................................................................-0.3V to +6.0V
All Other Pins ..............................................-0.3V to (V + 0.3V)
SOT143 (derate 4mW/°C above +70°C)........................320mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
CC
Input Current (V ).............................................................20mA
CC
Output Current (RESET)......................................................20mA
Rate of Rise (V ) ...........................................................100V/µs
CC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
MAX6315
ELECTRICAL CHARACTERISTICS
(V = +2.5V to +5.5V, T = -40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C.)
CC
A
A
PARAMETER
Operating Voltage Range
SYMBOL
CONDITIONS
= -40°C to +85°C
A
MIN
TYP
MAX
5.5
12
UNITS
V
CC
T
1.0
V
V
= 5.5V, no load
= 3.6V, no load
5
4
CC
V
CC
Supply Current
I
CC
µA
V
V
CC
10
T
A
= +25°C
V
- 1.8%
- 2.5%
V
TH
V
+ 1.8%
TH
TH
Reset Threshold (Note 1)
Reset Threshold Tempco
V
TH
T
A
= -40°C to +85°C
V
V + 2.5%
TH
TH
∆V /°C
60
35
ppm/°C
µs
TH
V
CC
to Reset Delay
V
CC
= falling at 1mV/µs
MAX6315US_ _D1-T
MAX6315US_ _D2-T
MAX6315US_ _D3-T
MAX6315US_ _D4-T
1
20
140
1120
1.4
28
200
1570
2
40
280
2240
2.4
Reset Timeout Period
MANUAL RESET INPUT
MR Input Threshold
t
ms
RP
V
V
V
V
0.8
IL
V
> 4.0V
< 4.0V
TH
IH
V
0.3 x V
CC
IL
V
TH
0.7 x V
CC
IH
1
µs
ns
MR Minimum Input Pulse
MR Glitch Rejection
MR to Reset Delay
100
500
63
ns
32
100
0.4
0.3
kΩ
MR Pull-Up Resistance
V
> 4.25V, I
= 3.2mA
CC
SINK
V
CC
> 2.5V, I
> 1.2V, I
> 1.0V, I
= 1.2mA
= 0.5mA
= 80µA
SINK
SINK
SINK
V
OL
V
RESET Output Voltage
V
CC
V
CC
0.3
1
µA
RESET Output Leakage Current
V
> V , RESET deasserted
CC TH
Note 1: The MAX6315 monitors V through an internal factory-trimmed voltage divider that programs the nominal reset threshold.
CC
Factory-trimmed reset thresholds are available in 100mV increments from 2.5V to 5V (see Ordering and Marking
Information).
2
_______________________________________________________________________________________
Op e n -Dra in S OT µP Re s e t Circ u it
MAX6315
__________________________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
(T = +25°C, unless otherwise noted.)
A
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
POWER-DOWN RESET DELAY
vs. TEMPERATURE
SUPPLY CURRENT vs. TEMPERATURE
6
5
4
3
2
1
0
6
50
40
V
CC
FALLING AT 1mV/µs
5
V
CC
= 5V
4
3
2
1
0
T = +85°C
A
V
= 4.63V
= 3.00V
TH
30
20
10
0
V
CC
= 3V
T = +25°C
V
TH
A
T = -40°C
A
V
CC
= 1V
0
1
2
3
5
4
-50 -30 -10 10
30
50
70
90
-50 -30 -10 10
30
50
70
90
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
TEMPERATURE (°C)
NORMALIZED RESET TIMEOUT PERIOD
NORMALIZED RESET THRESHOLD
MAXIMUM TRANSIENT DURATION
vs. TEMPERATURE (V RISING)
CC
vs. TEMPERATURE (V FALLING)
CC
vs. RESET COMPARATOR OVERDRIVE
1.04
1.006
1.004
1.002
1.000
0.998
0.996
0.994
100
T = +25°C
A
RESET OCCURS
ABOVE CURVE
1.03
1.02
1.01
80
60
40
20
0
V
TH
= 4.63V
1.00
0.99
0.98
0.97
V = 3.00V
T
0.96
-50 -30 -10 10
30
50
70
90
-50 -30 -10 10
30
50
70
90
10
100
RESET COMP. OVERDRIVE, V - V (mV)
1000
TEMPERATURE (°C)
TEMPERATURE (°C)
TH CC
______________________________________________________________P in De s c rip t io n
PIN
NAME
FUNCTION
1
GND
Ground
Active-Low Open-Drain Output. Connect to an external pull-up resistor. Can be pulled up to a voltage
higher than V , but less than 6V.
CC
2
RESET
MR
Manual Reset Input. A logic low on MR asserts reset. Reset remains asserted as long as MR is low, and
3
4
for the reset timeout period (t ) after the reset conditions are terminated. Connect to V if not used.
RP
CC
V
CC
Supply Voltage and Reset Threshold Monitor Input
_______________________________________________________________________________________
3
Op e n -Dra in S OT µP Re s e t Circ u it
_______________De t a ile d De s c rip t io n
+3.3V
+5.0V
Re s e t Ou t p u t
A microprocessor’s (µP’s) reset input starts the µP in a
known state. The MAX6315 asserts reset to prevent
V
CC
code-execution errors during power-up, power-down,
10k
or brownout conditions. RESET is guaranteed to be a
MR
RESET
logic low for V
> 1V (see Electrical Characteristics).
CC
Once V
exceeds the reset threshold, the internal
CC
5V SYSTEM
MAX6315
timer keeps reset asserted for the reset timeout period
(t ); after this interval RESET goes high. If a brownout
RP
condition occurs (monitored voltage dips below its pro-
MAX6315
grammed reset threshold), RESET goes low. Any time
GND
V
CC
dips below the reset threshold, the internal timer
resets to zero and RESET goes low. The internal timer
starts when V returns above the reset threshold, and
CC
RESET remains low for the reset timeout period.
Figure 1. MAX6315 Open-Drain RESET Output Allows Use
The MAX6315’s RESET output structure is a simple
open-drain N-channel MOSFET switch. Connect a pull-
up resistor to any supply in the 0V to +6V range. Select
a resistor value large enough to register a logic low
when RESET is asserted (see Electrical Characteristics),
and small enough to register a logic high while supply-
ing all input current and leakage paths connected to the
RESET line. A 10kΩ pull-up is sufficient in most applica-
tions.
with Multiple Supplies
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.
__________Ap p lic a t io n s In fo rm a t io n
Ne g a t ive -Go in g V
Tra n s ie n t s
CC
In addition to issuing a reset to the µP during power-up,
power-down, and brownout conditions, these devices
are relatively immune to short-duration negative-going
transients (glitches). The Typical Operating Character-
istics show the Maximum Transient Duration vs. Reset
Threshold Overdrive, for which reset pulses are not
generated. The graph was produced using negative-
Often, the pull-up connected to the MAX6315’s RESET
output will connect to the supply voltage monitored at
the IC’s V pin. However, some systems may use the
CC
open-drain output to level-shift from the monitored sup-
ply to reset circuitry powered by some other supply
(Figure 1). This is one useful feature of an open-drain
outp ut. Ke e p in mind tha t a s the MAX6315’s V
CC
going pulses, starting at V
max and ending below
RST
decreases below 1V, so does the IC’s ability to sink
the programmed reset threshold by the magnitude indi-
cated (reset threshold overdrive). The graph shows the
current at RESET. Finally, with any pull-up, RESET will
be pulled high as V
decays toward 0V. The voltage
CC
maximum pulse width that a negative-going V
tran-
CC
where this occurs depends on the pull-up resistor value
and the voltage to which it connects (see Electrical
Characteristics).
sient may typically have without causing a reset pulse
to be issued. As the transient amplitude increases (i.e.,
goes farther below the reset threshold), the maximum
a llowa b le p uls e wid th d e c re a s e s . A 0.1µF b yp a s s
Ma n u a l-Re s e t In p u t
Many µP-based products require manual-reset capabil-
ity, allowing the operator, a test technician, or external
logic circuitry to initiate a reset. A logic low on MR
asserts reset. Reset remains asserted while MR is low,
and for the reset active timeout period after MR returns
high.
capacitor mounted close to V
provides additional
CC
transient immunity.
MR has an internal 63kΩ pull-up resistor, so it can be
left open if not used. Connect a normally open momen-
tary switch from MR to GND to create a manual reset
function; external debounce circuitry is not required.
4
_______________________________________________________________________________________
Op e n -Dra in S OT µP Re s e t Circ u it
MAX6315
________________________________________________________Ord e rin g In fo rm a t io n
NOMINAL MIN t
SOT TOP
MARK
NOMINAL MIN t
SOT TOP
MARK
RP
RP
†
†
PART
PART
††
††
V
(V)
(ms)
V
(V)
TH
(ms)
TH
MAX6315US50D1-T
MAX6315US49D1-T
MAX6315US48D1-T
MAX6315US47D1-T
MAX6315US46D1-T
MAX6315US45D1-T
MAX6315US44D1-T
MAX6315US43D1-T
MAX6315US42D1-T
MAX6315US41D1-T
MAX6315US40D1-T
MAX6315US39D1-T
MAX6315US38D1-T
MAX6315US37D1-T
MAX6315US36D1-T
MAX6315US35D1-T
MAX6315US34D1-T
MAX6315US33D1-T
MAX6315US32D1-T
MAX6315US31D1-T
MAX6315US30D1-T
MAX6315US29D1-T
MAX6315US28D1-T
MAX6315US27D1-T
MAX6315US26D1-T
MAX6315US25D1-T
5.00
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
FX_ _
FY_ _
MAX6315US50D2-T
MAX6315US49D2-T
MAX6315US48D2-T
MAX6315US47D2-T
MAX6315US46D2-T
MAX6315US45D2-T
MAX6315US44D2-T
MAX6315US43D2-T
MAX6315US42D2-T
MAX6315US41D2-T
MAX6315US40D2-T
MAX6315US39D2-T
MAX6315US38D2-T
MAX6315US37D2-T
MAX6315US36D2-T
MAX6315US35D2-T
MAX6315US34D2-T
MAX6315US33D2-T
MAX6315US32D2-T
MAX6315US31D2-T
MAX6315US30D2-T
MAX6315US29D2-T
MAX6315US28D2-T
MAX6315US27D2-T
MAX6315US26D2-T
MAX6315US25D2-T
5.00
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
20
GX_ _
GY_ _
GZ_ _
HA_ _
HB_ _
HC_ _
HD_ _
HE_ _
HF_ _
HG_ _
HH_ _
HI_ _
4.90
4.80
4.70
4.63
4.50
4.39
4.30
4.20
4.10
4.00
3.90
3.80
3.70
3.60
3.50
3.40
3.30
3.20
3.08
3.00
2.93
2.80
2.70
2.63
2.50
4.90
4.80
4.70
4.63
4.50
4.39
4.30
4.20
4.10
4.00
3.90
3.80
3.70
3.60
3.50
3.40
3.30
4.20
3.08
3.00
2.93
2.80
2.70
2.63
2.50
FZ_ _
GA_ _
GB_ _
GC_ _
GD_ _
GE_ _
GF_ _
GG_ _
GH_ _
GI_ _
†††
†††
GJ_ _
GK_ _
GL_ _
GM_ _
GN_ _
GO_ _
GP_ _
GQ_ _
GR_ _
GS_ _
GT_ _
GU_ _
GV_ _
GW_ _
HJ_ _
HK_ _
HL_ _
HM_ _
HN_ _
HO_ _
HP_ _
HQ_ _
HR_ _
HS_ _
HT_ _
HU_ _
HV_ _
HW_ _
†††
†††
†
††
†††
The MAX6315 is available in a SOT143 package, -40°C to +85°C temperature range.
The first two letters in the package top mark identify the part, while the remaining two letters are the lot tracking code.
Sample stocks generally held on the bolded products; also, the bolded products have 2,500 piece minimum-order quantities.
Non-bolded products have 10,000 piece minimum-order quantities. Contact factory for details.
Note: All devices available in tape-and-reel only. Contact factory for availability.
_______________________________________________________________________________________
5
Op e n -Dra in S OT µP Re s e t Circ u it
___________________________________________Ord e rin g In fo rm a t io n (c o n t in u e d )
NOMINAL MIN t
SOT TOP
MARK
NOMINAL MIN t
SOT TOP
MARK
RP
RP
†
†
PART
PART
††
††
V
(V)
(ms)
V
(V)
TH
(ms)
TH
MAX6315US50D3-T
MAX6315US49D3-T
MAX6315US48D3-T
MAX6315US47D3-T
MAX6315US46D3-T
MAX6315US45D3-T
MAX6315US44D3-T
MAX6315US43D3-T
MAX6315US42D3-T
MAX6315US41D3-T
MAX6315US40D3-T
MAX6315US39D3-T
MAX6315US38D3-T
MAX6315US37D3-T
MAX6315US36D3-T
MAX6315US35D3-T
MAX6315US34D3-T
MAX6315US33D3-T
MAX6315US32D3-T
MAX6315US31D3-T
MAX6315US30D3-T
MAX6315US29D3-T
MAX6315US28D3-T
MAX6315US27D3-T
MAX6315US26D3-T
MAX6315US25D3-T
5.00
140
140
140
140
140
140
140
140
140
140
140
140
140
140
140
140
140
140
140
140
140
140
140
140
140
140
HX_ _
HY_ _
HZ_ _
IA_ _
IB_ _
IC_ _
ID_ _
IE_ _
IF_ _
IG_ _
IH_ _
II_ _
MAX6315US50D4-T
MAX6315US49D4-T
MAX6315US48D4-T
MAX6315US47D4-T
MAX6315US46D4-T
MAX6315US45D4-T
MAX6315US44D4-T
MAX6315US43D4-T
MAX6315US42D4-T
MAX6315US41D4-T
MAX6315US40D4-T
MAX6315US39D4-T
MAX6315US38D4-T
MAX6315US37D4-T
MAX6315US36D4-T
MAX6315US35D4-T
MAX6315US34D4-T
MAX6315US33D4-T
MAX6315US32D4-T
MAX6315US31D4-T
MAX6315US30D4-T
MAX6315US29D4-T
MAX6315US28D4-T
MAX6315US27D4-T
MAX6315US26D4-T
MAX6315US25D4-T
5.00
1120
1120
1120
1120
1120
1120
1120
1120
1120
1120
1120
1120
1120
1120
1120
1120
1120
1120
1120
1120
1120
1120
1120
1120
1120
1120
IX_ _
IY_ _
4.90
4.80
4.70
4.63
4.50
4.39
4.30
4.20
4.10
4.00
3.90
3.80
3.70
3.60
3.50
3.40
3.30
3.20
3.08
3.00
2.93
2.80
2.70
2.63
2.50
4.90
4.80
4.70
4.63
4.50
4.39
4.30
4.20
4.10
4.00
3.90
3.80
3.70
3.60
3.50
3.40
3.30
3.20
3.08
3.00
2.93
2.80
2.70
2.63
2.50
IZ_ _
JA_ _
JB_ _
JC_ _
JD_ _
JE_ _
JF_ _
JG_ _
JH_ _
JI_ _
MAX6315
†††
†††
†††
IJ_ _
JJ_ _
JK_ _
JL_ _
JM_ _
JN_ _
JO_ _
JP_ _
JQ_ _
JR_ _
JS_ _
JT_ _
JU_ _
JV_ _
JW_ _
IK_ _
IL_ _
IM_ _
IN_ _
IO_ _
IP_ _
IQ_ _
IR_ _
IS_ _
IT_ _
IU_ _
IV_ _
IW_ _
†††
†††
†††
†††
†
††
†††
The MAX6315 is available in a SOT143 package, -40°C to +85°C temperature range.
The first two letters in the package top mark identify the part, while the remaining two letters are the lot tracking code.
Sample stocks generally held on the bolded products; also, the bolded products have 2,500 piece minimum-order quantities.
Non-bolded products have 10,000 piece minimum-order quantities. Contact factory for details.
Note: All devices available in tape-and-reel only. Contact factory for availability.
6
_______________________________________________________________________________________
Op e n -Dra in S OT µP Re s e t Circ u it
MAX6315
___________________Ch ip In fo rm a t io n
TRANSISTOR COUNT: 519
________________________________________________________P a c k a g e In fo rm a t io n
_______________________________________________________________________________________
7
Op e n -Dra in S OT µP Re s e t Circ u it
NOTES
MAX6315
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
8 _____________________Ma x im In t e g ra t e d P ro d u c t s , 1 2 0 S a n Ga b rie l Drive , S u n n yva le , CA 9 4 0 8 6 4 0 8 -7 3 7 -7 6 0 0
© 1999 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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