MAX7393ALT__+ [MAXIM]
Precision Silicon Oscillators with Enable or Autoenable;
| 型号： | MAX7393ALT__+ |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Precision Silicon Oscillators with Enable or Autoenable |
| 文件： | 总9页 (文件大小：488K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MAX7393/MAX7394
Precision Silicon Oscillators with
Enable or Autoenable
General Description
Features
The MAX7393/MAX7394 precision silicon oscillators
replace crystals, ceramic resonators, and crystal oscilla-
tor modules in systems with a +2.4V to +3.6V operating
supply voltage range.
● ±0.25% (TDFN) and ±1.3% (μDFN) Total Accuracy
for 0°C to +85°C
● ±1.0% (TDFN) and ±1.8% (μDFN) Total Accuracy for
-40°C to +125°C
The MAX7393/MAX7394 consist of a temperature-com-
pensated precision oscillator with enable (MAX7394) or
autoenable (MAX7393). The MAX7393/MAX7394 are
supplied at specific frequencies, just like crystals and res-
onators. Output frequency accuracy is guaranteed to be
within ±0.25% (TDFN) and ±1.3% (μDFN) (0°C to +85°C)
and ±1.0% (TDFN) and ±1.8% (μDFN) over the -40°C to
+125°C temperature range.
● Resistant to Humidity and Vibration
● 12mA Operating Current (48MHz Version)
● 5ns Output Rise/Fall Time
● 40% to 60% Maximum Duty Cycle
● No External Components Required
● +2.4V to +3.6V Operation
The small size and robust operation of the MAX7393/
MAX7394 make them ideal for space-constrained or envi-
ronmentally demanding applications where high accu-
racy is required. The high accuracy of the MAX7393/
MAX7394 is ideal for use in USB applications, computers,
and white goods.
● Available Factory-Set Frequencies from 922kHz to
48MHz
● Space-Saving TDFN and μDFN Surface-Mount
Packages
The MAX7393/MAX7394 are available in 6-pin, 3mm x
3mm TDFN and 2mm x 2mm μDFN packages. They are
specified for the -40°C to +125°C temperature range.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
Applications
● USB
● Handheld Products
● White Goods
MAX7393 ALT_ _+
MAX7393ATT_ _+
MAX7394ALT_ _+
MAX7394ATT_ _+
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
6 μDFN
6 μDFN
6 μDFN
6 μDFN
● CAN Nodes
● Computers
Typical Application Circuits
2.4V TO 3.6V
*The two-letter frequency suffix following the part number is
found in the Selector Guide.
6
V
CC2
5
4
OSC1
OSC2
1
CLOCK
CLKIN
µC
+Denotes a lead(Pb)-free/RoHS-compliant package.
V
CC
MAX7393
Note: The MAX7394 is available in factory-set frequencies
from 922kHz to 48MHz. The MAX7393 is available in factory-
set frequencies from 922kHz to 20MHz. There are 10 standard
frequencies (see the Selector Guide) with a required 2.5k order
increment. Nonstandard frequencies are also available with a
required 10k order increment. For nonstandard versions,
contact factory for availability and ordering information.
I.C.
GND
2
3
2.4V TO 3.6V
6
V
CC2
5
OSC1
OSC2
1
4
CLOCK
µC
V
CC
MAX7394
ENABLE
I.C.
3
GND
2
Selector Guide and Pin Configurations appear at end of
data sheet.
19-3876; Rev 1; 4/14
MAX7393/MAX7394
Precision Silicon Oscillators with
Enable or Autoenable
Absolute Maximum Ratings
V
, V
to GND...............................................-0.3V to +4.0V
Operating Temperature Range......................... -40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range............................ -65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
CC CC2
CLOCK, CLKIN, ENABLE, I.C. to GND .. .-0.3V to (V
CLOCK Output Current ....................................................±50mA
+ 0.3V)
CC
Continuous Power Dissipation (T = +70°C)
A
6-Pin μDFN (derate 4.5mW/°C over +70°C) ...............358mW
6-Pin TDFN (derate 18.2mW/°C over +70°C) ..........1455mW
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.
Electrical Characteristics
(V
= V
= +2.4V to +3.6V, C = 10pF, T = -40°C to +125°C, unless otherwise noted. Typical values are at V
= V = +3.3V,
CC2
CC
CC2
L
A
CC
T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC CHARACTERISTICS
Operating Supply Voltage
Operating Output Supply Voltage
V
2.4
2.4
3.6
3.6
4.4
5.4
5.8
6.5
9.2
9.5
12
V
V
CC
V
CC2
922kHz, MAX739_ _ _ _LY
4MHz, MAX739_ _ _ _RD
8MHz, MAX739_ _ _ _TP
16MHz, MAX739_ _ _ _WB
32MHz, MAX7394_ _ _ YN
33MHz, MAX7394_ _ _ YQ
48MHz, MAX7394_ _ _ ZY
Total Operating Supply Current
(Note 2)
I
mA
TOT
Oscillator disabled,
Total Shutdown Supply Current
I
CLKIN = high (MAX7393),
ENABLE = low (MAX7394) (Note 2)
1
2
µA
SHDN
LOGIC INPUTS (ENABLE, CLKIN)
Logic Input High Voltage
Logic Input Low Voltage
CLOCK OUTPUT
V
0.7 x V
V
V
IH
CC2
V
0.3 x V
CC2
IL
Output High Voltage
Output Low Voltage
Output Rise Time
V
V
V
≥ 2.4V, I
≥ 2.4V, I
= 5mA
V - 0.3
CC2
V
V
OH
CC2
SOURCE
V
= 5mA
SINK
0.3
OL
CC2
t
(Note 3)
(Note 3)
(Note 3)
5
5
ns
ns
%
R
Output Fall Time
t
F
Duty Cycle
47
2
Startup Time
Time for output to stabilize
ms
Peak-to-peak jitter, 16MHz (MAX7394)
Peak-to-peak jitter, 48MHz (MAX7394)
180
140
Output Jitter (Note 3)
ps
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MAX7393/MAX7394
Precision Silicon Oscillators with
Enable or Autoenable
Electrical Characteristics (continued)
(V
= V
= +2.4V to +3.6V, C = 10pF, T = -40°C to +125°C, unless otherwise noted. Typical values are at V
= V = +3.3V,
CC2
CC
CC2
L
A
CC
T
= +25°C, unless otherwise noted.) (Note 1)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
FREQUENCY ACCURACY
T
= 0°C to +70°C
±20
±50
Clock Frequency Coefficient of
Temperature
A
V
= V
= 3.3V
ppm/°C
CC
CC2
T = -40°C to +125°C
A
Clock Frequency Coefficient of
Supply Voltage
T
= +25°C
0.1
0.15
%/V
A
TDFN
(Note 4)
±0.25
±1.3
±1.0
±1.8
T
= 0°C to
A
+85°C,
V
µDFN
(Note 5)
= ±10%
CC
Total Accuracy
V
CC
= V
CC2
= 3.3V
%
TDFN
(Note 4)
T
A
= -40°C to
+125°C,
V
µDFN
(Note 5)
= ±10%
CC
Note 1: All parameters are production tested at T = +25°C. Specifications over temperature are guaranteed by design and
A
characterization.
Note 2: The total supply current is the sum of I
and I
.
CC2
CC
Note 3: Guaranteed by design and characterization. Not production tested.
Note 4: Output frequency is production tested at T = +25°C and T = +85°C.
A
A
Note 5: Output frequency is production tested at T = +25°C.
A
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MAX7393/MAX7394
Precision Silicon Oscillators with
Enable or Autoenable
Typical Operating Characteristics
(V
= V
= 3.3V, T = +25°C, MAX7394, 48MHz output, unless otherwise noted.)
CC
CC2 A
TOTAL SUPPLY CURRENT
vs. TEMPERATURE
DUTY CYCLE vs. TEMPERATURE
DUTY CYCLE vs. SUPPLY VOLTAGE
60
60
58
56
54
52
50
48
46
44
42
40
10
9
8
7
6
5
4
3
2
1
0
V
= V
= +3.6V
CC2
CC
58
56
54
52
50
48
46
44
42
40
V
= +3.3V
CC2
= V
= +2.4V
CC2
CC
V
= V
CC
-40 -25 -10
5
20 35 50 65 80 95 110 125
2.4
2.6
2.8
3.0
3.2
3.4
3.6
-40 -25 -10
5
20 35 50 65 80 95 110 125
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
TOTAL SUPPLY CURRENT
vs. SUPPLY VOLTAGE
NORMALIZED FREQUENCY
vs. SUPPLY VOLTAGE
NORMALIZED FREQUENCY
vs. TEMPERATURE
10
8
1.000
0.999
0.998
0.997
0.996
0.995
1.002
1.000
0.998
0.996
0.994
0.992
0.990
6
4
2
0
2.4
2.6
2.8
3.0
3.2
3.4
3.6
2.4
2.6
2.8
3.0
3.2
3.4
3.6
-40 -25 -10
5
20 35 50 65 80 95 110 125
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
TOTAL SUPPLY CURRENT
vs. FREQUENCY
MAX7393 SETTLING TIME FROM START
MAX7393 toc08
9
8
7
6
5
4
3
2
1
0
(SEE FIGURE 1)
20MHz
V
= V
= +3.6V
CC2
CC
V
CC
= V
= +3.3V
CC2
ON/OFF
2V/div
CLOCK
2V/div
V
CC
= V
= +2.4V
CC2
400µs/div
0
6
12 18 24 30 36 42 48
FREQUENCY (MHz)
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MAX7393/MAX7394
Precision Silicon Oscillators with
Enable or Autoenable
Typical Operating Characteristics (continued)
(V
= V
= 3.3V, T = +25°C, MAX7394, 48MHz output, unless otherwise noted.)
CC
CC2 A
CLOCK OUTPUT WAVEFORM
WITH C = 10pF
MAX7394 SETTLING TIME FROM START
L
MAX7393 toc10
MAX7393 toc09
ENABLE
2V/div
CLOCK
1V/div
CLOCK
2V/div
10ns/div
400µs/div
Pin Description
PIN
NAME
FUNCTION
to GND with 0.1µF capacitors placed as close to
MAX7393 MAX7394
Positive Supply Voltage Input. Bypass V
CC
1
2
3
1
2
3
V
CC
the device as possible. Connect V
to V
.
CC
CC2
GND
Ground
Internally Connected. Connect I.C. to GND. Do not connect I.C. to any other input or output.
Do not leave I.C. unconnected.
I.C.
Clock Input. Connect CLKIN to a returned clock signal source (see the Autoenable (CLKIN,
MAX7393) section).
4
5
6
—
5
CLKIN
CLOCK Clock Output. CLOCK is a rail-to-rail, push-pull output.
Positive Supply Voltage Input for Output Driver. Bypass V
to GND with a 0.1µF capacitor
CC2
6
V
CC2
placed as close to the device as possible. Connect V
to V
.
CC2
CC
Enable Input. Drive ENABLE low to place the MAX7394 in shutdown mode. Drive ENABLE
high for normal operation.
—
—
4
ENABLE
EP
Exposed Pad (TDFN Version Only). Connect EP to ground. Do not connect EP to any other
input or output.
—
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MAX7393/MAX7394
Precision Silicon Oscillators with
Enable or Autoenable
Detailed Description
CLOCK
The MAX7393/MAX7394 precision silicon oscillators
replace crystals, ceramic resonators, and crystal oscilla-
tor modules in systems with a +2.4V to +3.6V operating
supply voltage range. The MAX7393/MAX7394 con-
sist of a temperature-compensated precision oscillator
with enable (MAX7394) or autoenable (MAX7393). The
ENABLE input on the MAX7394 manually enables or
disables the oscillator. The CLKIN input on the MAX7393
monitors a returned clock signal to automatically enable
or disable the MAX7393 oscillator.
MAX7393
ON/OFF
CLKIN
Figure 1. Test Circuit to Enable or Disable the MAX7393 Oscillator
Oscillator (CLOCK)
The CLOCK output is a push-pull, CMOS logic output
that is capable of driving a ground-connected 1kΩ load or
a positive supply connected 500Ω load to within 300mV
of either supply rail. There are no impedancematching
issues when using the MAX7393/MAX7394 CLOCK out-
put. A typical startup characteristic is shown in the Typical
Operating Characteristics.
The MAX7393/MAX7394 are supplied at specific frequen-
cies, like crystals and resonators. A variety of popular
standard frequencies are available (see the Selector
Guide). Output frequency accuracy is guaranteed to be
within ±0.25% (TDFN) and ±1.3% (μDFN) (0°C to +85°C)
and ±1.0% (TDFN) and ±1.8% (μDFN) over the -40°C to
+125°C temperature range. No external components are
required to generate the specific frequency.
Output Jitter
The MAX7393/MAX7394s’ jitter performance is given in the
Electrical Characteristics table as a peak-to-peak value.
ENABLE (MAX7394)
Applications Information
The ENABLE input on the MAX7394 turns the oscillator
on and off. Drive ENABLE to a logic-high for normal oper-
ation. Drive ENABLE to a logic-low to place the device in
shutdown mode. During shutdown, the oscillator is turned
off, and the CLOCK output is weakly driven high with an
Interfacing to a Microcontroller
clock Input
The MAX7393/MAX7394 CLOCK output is a push-pull,
CMOS logic output that directly drives any microproces-
sor (μP) or microcontroller (μC) clock input. There are no
impedance-matching issues when using the MAX7393/
MAX7394. Operate the MAX7393/MAX7394 and micro-
internal 10kΩ to V
. In shutdown mode, the total sup-
CC2
ply current reduces to less than 2μA.
Autoenable (CLKIN, MAX7393)
controller from the same supply voltage level of V
CC2
The MAX7393 features a CLKIN input that automatically
enables or disables the oscillator by sensing the condition
of a returned clock signal. The MAX7393 is automatically
enabled whenever an active inversion function is sensed
between CLOCK and CLKIN. When no inversion function
is detected, the MAX7393 automatically enters shutdown
mode. During shutdown, the oscillator is turned off, the
CLKIN input is weakly driven to its last state, and the
CLOCK output is weakly driven to the logic-level in CLKIN.
(see the Power-Supply Considerations section for more
details). Refer to the microcontroller’s data sheet for clock
input compatibility with external clock signals.
The MAX7393/MAX7394 require no biasing components
or load capacitance. When using the MAX7393/MAX7394
to retrofit a crystal oscillator, remove all biasing compo-
nents from the oscillator input.
Power-Supply Considerations
The MAX7393/MAX7394 operate with power-supply volt-
ages in the +2.4V to +3.6V range. Connect V
to the same supply voltage level as the device receiving
the clock. Proper power-supply decoupling is required to
maintain the power-supply rejection performance of the
MAX7393/MAX7394. Connect 0.1μF surface-mount ceram-
The CLKIN input relies on an external inversion function,
typically provided by a microcontroller’s clock generator,
to provide an inverted version of the CLOCK output sig-
nal. The MAX7393 interprets high/low voltage or a con-
stant high-impedance node on CLKIN as a disable signal.
and V
CC
CC2
Figure 1 shows a test circuit to enable or disable the
MAX7393. One input of the NAND gate connects to the
CLOCK output of the MAX7393, and the other input is
driven with a logic level. A logic-high level enables the
oscillator and a logic-low level disables the oscillator. See
the Typical Operating Characteristics for typical startup
performance of the MAX7393.
ic capacitors from V
bypass capacitors as close to V
CC
to V
to GND. Position these
and V as possible.
CC
CC2
CC2
A larger V
bypass capacitor value is recommended
CC2
if the MAX7393/MAX7394 are to operate with a large
capacitive load. Use a bypass capacitor value on V
CC2
at least 1000 times that of the output load capacitance.
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MAX7393/MAX7394
Precision Silicon Oscillators with
Enable or Autoenable
Selector Guide
Pin Configurations
PART
FREQUENCY PACKAGE TOP MARK
TOP VIEW OF
BOTTOM LEADS
V
CLOCK
5
CLKIN
4
CC2
MAX7393ATTLY
MAX7393ALTLY
MAX7393ATTMG
MAX7393ALTMG
MAX7393ATTRD
MAX7393ALTRD
MAX7393ATTTP
MAX7393ALTTP
MAX7393ATTWB
MAX7393ALTWB
MAX7393ATTWV
MAX7393ALTWV
MAX7394ATTLY
MAX7394ALTLY
MAX7394ATTMG
MAX7394ALTMG
MAX7394ATTRD
MAX7394ALTRD
MAX7394ATTTP
MAX7394ALTTP
MAX7394ATTWB
MAX7394ALTWB
MAX7394ATTWV
MAX7394ALTWV
MAX7394ATTYN
MAX7394ALTYN
MAX7394ATTYQ
MAX7394ALTYQ
MAX7394ATTZH
MAX7394ALTZH
MAX7394ATTZY
MAX7394ALTZY
922kHz
922kHz
1MHz
6 TDFN
6 μDFN
6 TDFN
6 μDFN
6 TDFN
6 μDFN
6 TDFN
6 μDFN
6 TDFN
6 μDFN
6 TDFN
6 μDFN
6 TDFN
6 μDFN
6 TDFN
6 μDFN
6 TDFN
6 μDFN
6 TDFN
6 μDFN
6 TDFN
6 μDFN
6 TDFN
6 μDFN
6 TDFN
6 μDFN
6 TDFN
6 μDFN
6 TDFN
6 μDFN
6 TDFN
6 FDFN
+ANP
+ABO
+ANQ
+ABP
+ANR
+ABQ
+ANS
+ABR
+AMN
+AAR
+AMO
+AAS
+ANV
+ABU
+ANW
+ABV
+ANX
+ABW
+ANY
+ABX
+AMU
+AAY
+AMV
+AAZ
+ANZ
+ABY
+AMX
+ABB
+AOA
+ABZ
+AMZ
+ABD
6
MAX7393
1MHz
4MHz
1
2
3
+
4MHz
V
GND
I.C.
CC
8MHz
µDFN
8MHz
V
CLOCK CLKIN
CC2
16MHz
16MHz
20MHz
20MHz
922kHz
922kHz
1MHz
6
5
4
*EP
MAX7393
+
1
2
3
1MHz
V
CC
GND
I.C.
4MHz
TDFN
*EXPOSED PAD. CONNECT EP TO GROUND.
4MHz
8MHz
V
CC2
CLOCK
5
ENABLE
4
8MHz
6
16MHz
16MHz
20MHz
20MHz
32MHz
32MHz
33MHz
33MHz
40MHz
40MHz
48MHz
48MHz
MAX7394
1
2
3
+
V
GND
I.C.
CC
µDFN
V
CLOCK ENABLE
CC2
6
5
4
*EP
MAX7394
+
1
2
3
V
CC
GND
I.C.
TDFN
*EXPOSED PAD. CONNECT EP TO GROUND.
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MAX7393/MAX7394
Precision Silicon Oscillators with
Enable or Autoenable
Chip Information
PROCESS: BiCMOS
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maximintegrated.com/packages. Note
that a “+”, “#”, or “-” in the package code indicates RoHS status
only. Package drawings may show a different suffix character, but
the drawing pertains to the package regardless of RoHS status.
PACKAGE PACKAGE OUTLINE
LAND
TYPE
6 μDFN
6 TDFN
CODE
L622-1
T633+2
NO.
PATTERN NO.
21-0164
21-0137
90-0004
90-0058
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MAX7393/MAX7394
Precision Silicon Oscillators with
Enable or Autoenable
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
0
1
5/06
4/14
Initial release
No /V OPNs; removed Automotive reference from Applications section
—
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
©
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
2014 Maxim Integrated Products, Inc.
│ 9
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