MAX7382CPYN-T [MAXIM]
Analog Circuit, 1 Func, BICMOS, PDSO5, MO-178AA, SOT-23, 5 PIN;
| 型号： | MAX7382CPYN-T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Analog Circuit, 1 Func, BICMOS, PDSO5, MO-178AA, SOT-23, 5 PIN 信息通信管理 光电二极管 |
| 文件： | 总8页 (文件大小：182K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-3491; Rev 0; 1/05
Silicon Oscillator with Reset Output
General Description
Features
The MAX7382 silicon oscillator replaces ceramic res-
onators, crystals, and crystal-oscillator modules as the
clock source for microcontrollers in 3V, 3.3V, and 5V
applications. The MAX7382 features a factory-pro-
grammed oscillator and a microprocessor (µP) power-
on-reset (POR) supervisor.
♦ 2.7V to 5.5V Operation
♦ 10MHz to 32MHz Oscillator
♦ Integrated POR
♦
10ꢀm ꢁlocꢂ Oꢃtpꢃt ꢄriꢅe ꢁapaꢆilitꢇ
♦ 2.5% Initial mccꢃracꢇ
50ppꢀꢈ/ꢁ ꢉreꢊꢃencꢇ ꢄriꢋt
Unlike typical crystal and ceramic-resonator oscillator
circuits, the MAX7382 is resistant to vibration and EMI.
The high-output-drive current and absence of high-
impedance nodes makes the oscillator less susceptible
to dirty or humid operating conditions. With a wide
operating temperature range as standard, the
MAX7382 is a good choice for demanding home appli-
ance and automotive environments.
♦
♦ 50% ꢄꢃtꢇ ꢁꢇcle
♦ 5ns Oꢃtpꢃt Rise and ꢉall Tiꢀe
♦ Low Jitter: 80ps
at 16MHz
P-P
♦ 4ꢀm Operating ꢁꢃrrent at 16MHz
♦ -40/ꢁ to +125/ꢁ Teꢀperatꢃre Range
♦ Sꢀall 5-Pin SOT23 Pacꢂage
The MAX7382 is available with factory-programmed fre-
quencies ranging from 10MHz to 32MHz. See Table 2
for standard frequencies and contact the factory for
custom frequencies. Refer to the MAX7376 data sheet
for frequencies less than 10MHz.
Ordering Information
The MAX7382 is available in a 5-pin SOT23 package.
The MAX7382 standard operating temperature range is
-40°C to +125°C. See the Applications Information sec-
tion for extended operating temperature range.
PIN-
PmꢁKmGE
RESET
OUTPUT
PmRT*
TEMP RmNGE
Active-high
push-pull
MAX7382A_ _ _-T -40°C to +125°C 5 SOT23-5
MAX7382B_ _ _-T -40°C to +125°C 5 SOT23-5
Applications
Active-low
push-pull
White Goods
5 SOT23-5 Open drain
MmX7382ꢁ_ _ _-T -40°ꢁ to +125°ꢁ
Automotive
*Standard version is shown in bold. The first letter after the part
number designates the reset output option. Insert the letter
corresponding to the desired reset threshold level from Table 1
in the next position. Insert the two-letter code from Table 2 in
the remaining two positions for the desired frequency range.
Table 1 and Table 2 are located at the end of the data sheet.
Consumer Products
Appliances and Controls
Handheld Products
Portable Equipment
Microcontroller Systems
Typical Operating Circuit
V
CC
2.7V TO 5.5V
0.1µF
V
CC
OSC1
CLOCK
OSC2
RST
MAX7382
E.C.
RST/RST
µC
GND
Pin Configuration appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Silicon Oscillator with Reset Output
mBSOLUTE MmXIMUM RmTINGS
CC
All Other Pins to GND...................................-0.3V to (V+ + 0.3V)
CLOCK, RST Current ....................................................... 50mA
V
to GND...........................................................-0.3V to +6.0V
Operating Temperature Range .........................-55°C to +135°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Continuous Power Dissipation (T = +70°C)
A
5-Pin SOT23 (derate 7.1mW/°C above +70°C)....571mW (U5-2)
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.
ELEꢁTRIꢁmL ꢁHmRmꢁTERISTIꢁS
(Typical Operating Circuit, V
= 2.7V to 5.5V, V = V , T = -40°C to +125°C. Typical values are at V
= 5.0V, T = +25°C,
CC A
CC
L
CC
A
unless otherwise noted.) (Note 1)
PmRmMETER
SYMBOL
ꢁONꢄITIONS
MIN
TYP
MmX
UNITS
Operating Supply Voltage
V
2.7
5.5
V
CC
f
= 16MHz, T = -40°C to +125°C,
A
CLOCK
8.7
8.0
6.5
6.0
5.4
no load
f
= 14.7456MHz, T = -40°C to
A
CLOCK
+125°C, no load
f
= 12MHz, T = -40°C to +125°C,
CLOCK
A
Operating Supply Current
I
mA
CC
no load
f
= 11.0592MHz, T = -40°C to
A
CLOCK
+125°C, no load
f
= 10MHz, T = -40°C to +125°C,
CLOCK
A
no load
ꢁLOꢁK OUTPUT
V = 4.5V, I
= 7.0mA
= 2.0mA
L
SOURCE
Output High Voltage
V
V - 0.4
L
V
V
OH
V = 2.7V, I
L
SOURCE
V = 4.5V, I
= 20mA
L
SINK
SINK
Output Low Voltage
V
0.4
OL
V = 2.7V, I
L
= 10mA
V
= 5V, T = +25°C, deviation from
A
CC
-2.5
-5.0
+2.5
+3.5
selected frequency
Clock Frequency Accuracy
f
%
CLOCK
V
= 2.7V to 5.5V, T = +25°C,
CC
A
deviation from selected frequency
Clock Temperature Coefficient
Duty Cycle
T
= -40°C to +125°C
50
50
350
60
ppm/°C
%
A
(Note 2)
40
2
_______________________________________________________________________________________
Silicon Oscillator with Reset Output
ELEꢁTRIꢁmL ꢁHmRmꢁTERISTIꢁS (continꢃed)
(Typical Operating Circuit, V
= 2.7V to 5.5V, V = V , T = -40°C to +125°C. Typical values are at V
= 5.0V, T = +25°C,
CC A
CC
L
CC
A
unless otherwise noted.) (Note 1)
PmRmMETER
SYMBOL
ꢁONꢄITIONS
MIN
TYP
MmX
UNITS
ps
Observation of 16MHz for 20s using a
12GHz oscilloscope
Output Jitter
80
P-P
Output Rise Time
Output Fall Time
t
10% to 90%
90% to 10%
5
5
ns
R
t
ns
F
T
T
= +25°C
-2
-5
+2
+5
A
V
rising, deviation
CC
Power-On-Reset Threshold
V
TH
%
= -40°C to
A
from nominal threshold
+125°C
Difference between rising and falling
thresholds
Reset Hysteresis
HYST
POR
1
%
Power-On-Reset Delay
V
rising from 0 to 5V in 1µs at +25°C
CC
122
µs
DLY
RESET OUTPUT
V
0.4
-
-
CC
V = 4.5V, I
= 7.0mA
= 2.0mA
L
SOURCE
Output High Voltage
(Note 3)
V
V
V
OH
V
0.4
CC
V = 2.7V, I
L
SOURCE
V = 4.5V, I
= 20mA
0.4
0.4
L
SINK
Output Low Voltage
V
OL
V = 2.7V, I
= 10mA
L
SOURCE
Note 1: All parameters tested at T = +25°C. Specifications over temperature are guaranteed by design.
A
Note 2: Guaranteed by design. Not production tested.
Note 3: For push-pull output only.
_______________________________________________________________________________________
3
Silicon Oscillator with Reset Output
Typical Operating Characteristics
(V
= V = 5V, T = +25°C, frequency = 10MHz, unless otherwise noted.)
CC
L
A
DUTY CYCLE
vs. SUPPLY VOLTAGE
DUTY CYCLE vs. TEMPERATURE
SUPPLY CURRENT vs. TEMPERATURE
51
50
49
48
47
46
45
3.25
3.20
3.15
3.10
3.05
3.00
2.95
2.90
50.5
50.0
49.5
49.0
48.5
48.0
FREQUENCY = 11.0592MHz
FREQUENCY = 10MHz
FREQUENCY = 10MHz
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
SUPPLY VOLTAGE (V)
-55
-17
21
59
97
135
-55
-17
21
59
97
135
TEMPERATURE (°C)
TEMPERATURE (°C)
FREQUENCY DEVIATION
vs. SUPPLY VOLTAGE
FREQUENCY DEVIATION
vs. TEMPERATURE
SUPPLY CURRENT vs. SUPPLY VOLTAGE
2.0
1.5
1.0
0.5
0
4
3
4.0
3.5
3.0
2.5
2.0
1.5
FREQUENCY = 11.0592MHz
FREQUENCY = 10MHz
FREQUENCY = 11.0592MHz
2
1
0
-0.5
-1.0
-1.5
-2.0
-1
-2
-3
-4
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
SUPPLY VOLTAGE (V)
-55
-17
21
59
97
135
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
CLOCK OUTPUT WAVEFORM
CLOCK OUTPUT WAVEFORM
(C = 10pF)
(C = 10pF)
L
SETTLING TIME FROM START
L
MAX7382 toc09
MAX7382 toc08
MAX7382 toc07
CH1 FREQ
9.992MHz
LOW RESOLUTION
20ns/div
20ns/div
10µs/div
CHANNEL 1 = CLOCK, CHANNEL 2 = V
CC
4
_______________________________________________________________________________________
Silicon Oscillator with Reset Output
Typical Operating Characteristics (continued)
(V
= V = 5V, T = +25°C, frequency = 10MHz, unless otherwise noted.)
L A
CC
CLOCK OUTPUT WAVEFORM
MAXIMUM TRANSIENT DURATION
vs. RESET THRESHOLD OVERDRIVE
SUPPLY CURRENT
vs. FREQUENCY
(C = 100pF)
L
MAX7382 toc10
1
0.1
5
4
3
2
1
0.01
1m
10m
100m
1µ
V
= 4.32V
RESET
0.14
20ns/div
0.04
0.09
0.19
0.24
10
11
12
13
14
15
16
RESET THRESHOLD OVERDRIVE (V)
FREQUENCY (MHz)
Pin Description
PIN
1
NmME
CLOCK
GND
ꢉUNꢁTION
Push-Pull Clock Output
Ground
2
3
RST
Reset Output. Open-drain or push-pull output. See the Ordering Information.
Positive Supply Voltage. Bypass with a 0.1µF capacitor to GND.
Externally Connected. Connect to Vcc.
4
V
CC
5
E.C.
Oscillator
Detailed Description
The push-pull clock output drives a load to within
400mV of either supply rail. The clock output remains
stable over the full operating voltage range and does
not generate short output cycles during either power-on
or changing of the frequency. A typical oscillating start-
up is shown in the Typical Operating Characteristics.
The MAX7382 is a clock generator with integrated reset
for microcontrollers (µCs) and UARTs in 3V, 3.3V, and
5V applications. The MAX7382 is a replacement for
crystal-oscillator modules, crystals, or ceramic res-
onators, and a system reset IC. The clock frequency
and reset threshold voltage are factory trimmed to spe-
cific values. A variety of popular standard frequencies
are available; see Table 2. No external components are
required for setting or adjusting the frequency.
_______________________________________________________________________________________
5
Silicon Oscillator with Reset Output
Applications Information
Interfacing to a Microcontroller
Clock Input
Taꢆle 1. Standard Reset Threshold
Leꢅels
SUꢉꢉIX
RESET THRESHOLꢄ (V)
The MAX7382 clock output is a push-pull, CMOS, logic
output that directly drives a µP or µC clock input. There
are no impedance-matching issues when using the
MAX7382. Refer to the microcontroller data sheet for
clock input compatibility with external clock signals.
The MAX7382 requires no biasing components or load
capacitance. When using the MAX7382 to retrofit a
crystal oscillator, remove all biasing components from
the oscillator input.
X
V
R
Q
P
N
J
2.50
2.71
2.89 standard value
3.13
3.34
3.44
3.96
M
4.38 standard value
Contact factory for nonstandard reset threshold options.
Reset Output
The MAX7382 is available with three reset output stage
options: push-pull active-low, push-pull active-high, and
open-drain active-low. RST is asserted when the moni-
Taꢆle 2. Standard ꢉreꢊꢃencies
SUꢉꢉIX
UK
STmNꢄmRꢄ ꢉREQUENꢁY (MHz)
tored input (V ) drops below the internal V
threshold
CC
TH-
10
11.0592
12
and remains asserted for 120µs after the monitored input
exceeds the internal V threshold. The open-drain
UT
TH+
VB
RST output requires an external pullup resistor.
VT
14.7456
16
Output Jitter
WB
YN
The MAX7382’s jitter performance is given in the
Electrical Characteristics table as a peak-to-peak value
obtained by observing the output of the MAX7382 for
20s with a 12GHz oscilloscope. Jitter measurements
are approximately proportional to the period of the out-
put of the device. Thus, a 10MHz device has approxi-
mately twice the jitter value of a 20MHz device. The
jitter performance of all clock sources degrades in the
presence of mechanical and electrical interference.
32
For all other frequency options, contact factory.
Taꢆle 3. Standard Part Nꢃꢀꢆers
RESET
THRESHOLꢄ
(V)
ꢉREQUENꢁY
(MHz)
TOP
MmRK
PmRT
MAX7382CRUK
MAX7382CRUT*
MAX7382CRVB
MAX7382CRVT*
MAX7382CRWB
MAX7382CRYN*
MAX7382CMUK*
MAX7382CMUT*
MAX7382CMVB
MAX7382CMVT*
MAX7382CMWB
MAX7382CMYN*
2.89
2.89
2.89
2.89
2.89
2.89
4.38
4.38
4.38
4.38
4.38
4.38
10
11.0592
12
14.7456
16
32
10
11.0592
12
14.7456
16
AEVU
—
AEVM
—
AEVK
AEVL
—
—
AEVJ
—
AEVH
AEVI
V
2.7V TO 5.5V
CC
RST
MAX7382
POR
32
CLOCK
OSCILLATOR
*Contact factory for availability.
The MAX7382 is relatively immune to vibration, shock,
and EMI influences and thus provides a considerably
more robust clock source than crystal or ceramic res-
onator-based oscillator circuits.
GND
Figure 1. Functional Diagram
6
_______________________________________________________________________________________
Silicon Oscillator with Reset Output
Initial Power-Up and Operation
Pin Configuration
An internal power-up reset holds the clock output low
until the supply voltage has risen above the power-on-
reset threshold (V
).
TOP VIEW
TH+
RST holds the microcontroller in a reset condition until
120µs after the clock has started up. This reset delay
ensures that the clock output and the microcontroller’s
internal clock circuits have stabilized before the system
is allowed to start. Typical microcontroller reset delay
ranges from 1ms to 250ms to allow a slow crystal oscil-
lator circuit to start up. The MAX7382 has a fast startup,
eliminating the need for such a long reset delay.
CLOCK
GND
1
2
3
5
4
E.C.
MAX7382
RST
V
CC
Extended Temperature Operation
The MAX7382 was tested to +135°C during product char-
acterization and shown to function normally at this tem-
perature (see the Typical Operating Characteristics).
However, production test and qualification is only per-
formed from -40°C to +125°C at this time. Contact the fac-
tory if operation outside this range is required.
SOT23
Chip Information
TRANSISTOR COUNT: 2937
PROCESS: BiCMOS
Power-Supply Considerations
The MAX7382 operates with a 2.7V and 5.5V power-
supply voltage. Good power-supply decoupling is
needed to maintain the power-supply rejection perfor-
mance of the MAX7382. Bypass V
to GND with a
CC
0.1µF surface-mount ceramic capacitor. Mount the
bypassing capacitor as close to the device as possible.
If possible, mount the MAX7382 close to the microcon-
troller’s decoupling capacitor so that additional decou-
pling is not required. Use a larger value of bypass
capacitor recommended if the MAX7382 is to operate
with a large capacitive load. Use a bypass capacitor
value of at least 1000 times that of the output load
capacitance.
_______________________________________________________________________________________
7
Silicon Oscillator with Reset Output
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.ꢀaxiꢀ-ic.coꢀꢈpacꢂages.)
PACKAGE OUTLINE, SOT-23, 5L
1
21-0057
E
1
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 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2005 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products, Inc.
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