MAX7393/4 DS
General Description
The MAX7393/MAX7394 precision silicon oscillators
replace crystals, ceramic resonators, and crystal oscillator
modules in systems with a +2.4V to +3.6V operating sup-
ply voltage range.
The MAX7393/MAX7394 consist of a temperature-com-
pensated precision oscillator with enable (MAX7394) or
autoenable (MAX7393). The MAX7393/MAX7394 are sup-
plied at specific frequencies, just like crystals and res-
onators. Output frequency accuracy is guaranteed to be
within 0.25% (TDFN) and 1.3% (DFN) (0C to +85C)
and 1.0% (TDFN) and 1.8% (DFN) over the -40C to
+125C temperature range.
The small size and robust operation of the MAX7393/
MAX7394 make them ideal for space-constrained or envi-
ronmentally demanding applications where high accura-
cy is required. The high accuracy of the MAX7393/
MAX7394 is ideal for use in USB applications, computers,
and white goods.
The MAX7393/MAX7394 are available in 6-pin, 3mm x
3mm TDFN and 2mm x 2mm DFN packages. They are
specified for the -40C to +125C temperature range.
Applications
Features
0.25% (TDFN) and 1.3% (DFN) Total Accuracy
for 0C to +85C
1.0% (TDFN) and 1.8% (DFN) Total Accuracy
for -40C to +125C
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
Available Factory-Set Frequencies from 922kHz to
48MHz
Space-Saving TDFN and DFN Surface-Mount
Packages
MAX7393/MAX7394
Precision Silicon Oscillators with
Enable or Autoenable
________________________________________________________________ Maxim Integrated Products
1
Ordering Information
19-3876; Rev 0; 5/06
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.
PA R T * T
EM P RA N G E
PIN -
PA C K A G E
PK G
C O D E
M A X7 3 9 3 ALT_ _+
- 40C to + 125C 6
D
FN L622-
1
M AX 7393ATT_ _+
- 40C to + 125C 6
TD
FN T633-
1
M A X7 3 9 4 ALT_ _+
- 40C to + 125C 6
D
FN L622-
1
M AX 7394ATT_ _+
- 40C to + 125C 6
TD
FN T633-
1
*The two-letter frequency suffix following the part number is found
in the Selector Guide.
+Denotes lead-free package.
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.
USB
CAN Nodes
Automotive Systems
Computers
Handheld Products
White Goods
Selector Guide and Pin Configurations appear at end of
data sheet.
Typical Application Circuits
MAX7393
V
CC2
2.4V TO 3.6V
6
2
3
GND
I.C.
V
CC
1
C
CLOCK
5
OSC1
CLKIN
4
OSC2
MAX7394
V
CC2
2.4V TO 3.6V
6
2
3
ENABLE
GND
I.C.
V
CC
1
C
CLOCK
5
OSC1
OSC2
4
MAX7393/MAX7394
Precision Silicon Oscillators with
Enable or Autoenable
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= V
CC2
= +2.4V to +3.6V, C
L
= 10pF, T
A
= -40C to +125C, unless otherwise noted. Typical values are at V
CC
= V
CC2
= +3.3V,
T
A
= +25C, unless otherwise noted.) (Note 1)
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.
V
CC
, V
CC2
to GND.................................................-0.3V to +4.0V
CLOCK, CLKIN, ENABLE, I.C. to GND ......-0.3V to (V
CC
+ 0.3V)
CLOCK Output Current ....................................................50mA
Continuous Power Dissipation (T
A
= +70C)
6-Pin DFN (derate 4.5mW/C over +70C) ................358mW
6-Pin TDFN (derate 18.2mW/C over +70C) ............1455mW
Operating Temperature Range .........................-40C to +125C
Junction Temperature ......................................................+150C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10s) .................................+300C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC CHARACTERISTICS
Operating Supply Voltage
V
CC
2.4
3.6
V
Operating Output Supply Voltage
V
CC2
2.4
3.6
V
922kHz, MAX739_ _ _ _LY
4.4
4MHz, MAX739_ _ _ _RD
5.4
8MHz, MAX739_ _ _ _TP
5.8
16MHz, MAX739_ _ _ _WB
6.5
32MHz, MAX7394_ _ _ YN
9.2
33MHz, MAX7394_ _ _ YQ
9.5
Total Operating Supply Current
(Note 2)
I
TOT
48MHz, MAX7394_ _ _ ZY
12
mA
Total Shutdown Supply Current
I
SHDN
Oscillator disabled,
CLKIN = high (MAX7393),
ENABLE = low (MAX7394) (Note 2)
1
2
A
LOGIC INPUTS (ENABLE, CLKIN)
Logic Input High Voltage
V
IH
0.7
x V
CC2
V
Logic Input Low Voltage
V
IL
0.3
x V
CC2
V
CLOCK OUTPUT
Output High Voltage
V
OH
V
CC2
2.4V, I
SOURCE
= 5mA
V
CC2
- 0.3
V
Output Low Voltage
V
OL
V
CC2
2.4V, I
SINK
= 5mA
0.3
V
Output Rise Time
t
R
(Note 3)
5
ns
Output Fall Time
t
F
(Note 3)
5
ns
Duty Cycle
(Note 3)
47
%
Startup Time
Time for output to stabilize
2
ms
Peak-to-peak jitter, 16MHz (MAX7394)
180
Output Jitter (Note 3)
Peak-to-peak jitter, 48MHz (MAX7394)
140
ps
MAX7393/MAX7394
Precision Silicon Oscillators with
Enable or Autoenable
_______________________________________________________________________________________
3
Note 1: All parameters are production tested at T
A
= +25C. Specifications over temperature are guaranteed by design and
characterization.
Note 2: The total supply current is the sum of I
CC
and I
CC2
.
Note 3: Guaranteed by design and characterization. Not production tested.
Note 4: Output frequency is production tested at T
A
= +25C and T
A
= +85C.
Note 5: Output frequency is production tested at T
A
= +25C.
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= V
CC2
= +2.4V to +3.6V, C
L
= 10pF, T
A
= -40C to +125C, unless otherwise noted. Typical values are at V
CC
= V
CC2
= +3.3V,
T
A
= +25C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
FREQUENCY ACCURACY
T
A
= 0C to +70C
20
Clock Frequency Coefficient of
Temperature
V
C C
= V
C C 2
= 3.3V
T
A
= -40C to +125C
50
ppm/C
Clock Frequency Coefficient of
Supply Voltage
T
A
= +25C
0.1
0.15
%/V
TD FN
( N ote 4)
0.25
T
A
= 0C to
+ 85C ,
V
C C
= 10% D FN
( N ote 5)
1.3
TD FN
( N ote 4)
1.0
Total Accuracy
V
C C
= V
C C 2
= 3.3V
T
A
= - 40C
to + 125 C ,
V
C C
= 10% D FN
( N ote 5)
1.8
%
MAX7393/MAX7394
Precision Silicon Oscillators with
Enable or Autoenable
4
_______________________________________________________________________________________
DUTY CYCLE vs. TEMPERATURE
TEMPERATURE (
C)
DUTY CYCLE (%)
MAX7393/4 toc01
-40 -25 -10 5
20 35 50 65 80 95 110 125
40
42
44
46
48
50
52
54
56
58
60
DUTY CYCLE vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
DUTY CYCLE (%)
MAX7393/4 toc01
2.4
2.6
2.8
3.0
3.2
3.4
3.6
40
42
44
46
48
50
52
54
56
58
60
TOTAL SUPPLY CURRENT
vs. TEMPERATURE
TEMPERATURE (
C)
TOTAL SUPPLY CURRENT (mA)
MAX7393/4 toc03
-40 -25 -10 5
20 35 50 65 80 95 110 125
0
1
2
3
4
5
6
7
8
9
10
V
CC
= V
CC2
= +3.6V
V
CC
= V
CC2
= +2.4V
V
CC
= V
CC2
= +3.3V
TOTAL SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
TOTAL SUPPLY CURRENT (mA)
MAX7393 toc04
2.4
2.6
2.8
3.0
3.2
3.4
3.6
0
2
4
6
8
10
NORMALIZED FREQUENCY
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
MAX7393/4 toc05
2.4
2.6
2.8
3.0
3.2
3.4
3.6
0.995
0.996
0.997
0.998
0.999
1.000
NORMALIZED FREQUENCY
NORMALIZED FREQUENCY
vs. TEMPERATURE
TEMPERATURE (
C)
NORMALIZED FREQUENCY
MAX7393/4 toc06
-40 -25 -10 5
20 35 50 65 80 95 110 125
0.990
1.000
0.998
0.996
0.994
0.992
1.002
TOTAL SUPPLY CURRENT
vs. FREQUENCY
FREQUENCY (MHz)
TOTAL SUPPLY CURRENT (mA)
MAX7393 toc07
0
6
12
18
24
30
36
42
48
0
1
2
3
4
5
6
7
8
9
V
CC
= V
CC2
= +2.4V
V
CC
= V
CC2
= +3.3V
V
CC
= V
CC2
= +3.6V
MAX7393 SETTLING TIME FROM START
MAX7393 toc08
CLOCK
2V/div
ON/OFF
2V/div
(SEE FIGURE 1)
20MHz
400
s/div
Typical Operating Characteristics
(V
CC
= V
CC2
= 3.3V, T
A
= +25C, MAX7394, 48MHz output, unless otherwise noted.)
MAX7393/MAX7394
Precision Silicon Oscillators with
Enable or Autoenable
_______________________________________________________________________________________
5
Pin Description
PIN
MAX7393
MAX7394
NAME
FUNCTION
1
1
V
CC
Positive Supply Voltage Input. Bypass V
CC
to GND with 0.1F capacitors placed as close to
the device as possible. Connect V
CC
to V
CC2
.
2
2
GND
Ground
3
3
I.C.
Internally Connected. Connect I.C. to GND. Do not connect I.C. to any other input or output.
Do not leave I.C. unconnected.
4
--
CLKIN
Clock Input. Connect CLKIN to a returned clock signal source (see the Autoenable (CLKIN,
MAX7393) section).
5
5
CLOCK
Clock Output. CLOCK is a rail-to-rail, push-pull output.
6
6
V
CC2
Positive Supply Voltage Input for Output Driver. Bypass V
CC2
to GND with a 0.1F capacitor
placed as close to the device as possible. Connect V
CC2
to V
CC
.
--
4
ENABLE
Enable Input. Drive ENABLE low to place the MAX7394 in shutdown mode. Drive ENABLE
high for normal operation.
--
--
EP
Exposed Paddle, TDFN Version Only. Connect EP to ground. Do not connect EP to any other
input or output.
MAX7394 SETTLING TIME FROM START
MAX7393 toc09
CLOCK
2V/div
ENABLE
2V/div
400
s/div
CLOCK OUTPUT WAVEFORM
WITH C
L
= 10pF
MAX7393 toc10
CLOCK
1V/div
10ns/div
Typical Operating Characteristics (continued)
(V
CC
= V
CC2
= 3.3V, T
A
= +25C, MAX7394, 48MHz output, unless otherwise noted.)
PDF 
ZIP