Rainbow Electronics MAX7394 User Manual
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 supply voltage range.
The MAX7393/MAX7394 consist of a temperature-compensated precision oscillator with enable (MAX7394) or
autoenable (MAX7393). The MAX7393/MAX7394 are supplied at specific frequencies, just like crystals and resonators. 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.
The small size and robust operation of the MAX7393/
MAX7394 make them ideal for space-constrained or environmentally demanding applications where high accuracy 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 µDFN packages. They are
specified for the -40°C to +125°C temperature range.
Applications
Features
♦ ±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
♦ 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 µDFN 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.
*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
2.4V TO 3.6V
6
V
V
V
CC
CC
CC2
MAX7393
GNDI.C.
23
2.4V TO 3.6V
6
V
CC2
1
1
CLOCK
CLKIN
CLOCK
5
OSC1
4
OSC2
5
OSC1
µC
µC
PA R T * T EM P RA N G E
M A X7 3 9 3 ALT_ _+ - 40°C to + 125°C 6 µD FN L622- 1
M AX 7393ATT_ _+ - 40°C to + 125°C 6 TD FN T633- 1
M A X7 3 9 4 ALT_ _+ - 40°C to + 125°C 6 µD FN L622- 1
M AX 7394ATT_ _+ - 40°C to + 125°C 6 TD FN T633- 1
PIN -
PA C K A G E
PK G
C O D E
MAX7394
4
ENABLE
GNDI.C.
23
OSC2
MAX7393/MAX7394
Precision Silicon Oscillators with
Enable or Autoenable
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VCC= V
CC2
= +2.4V to +3.6V, CL= 10pF, TA= -40°C to +125°C, unless otherwise noted. Typical values are at VCC= V
CC2
= +3.3V,
T
A
= +25°C, 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.
VCC, 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
= +70°C)
6-Pin µDFN (derate 4.5mW/°C over +70°C) ................358mW
6-Pin TDFN (derate 18.2mW/°C over +70°C) ............1455mW
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
DC CHARACTERISTICS
Operating Supply Voltage V
Operating Output Supply Voltage V
Total Operating Supply Current
(Note 2)
Total Shutdown Supply Current I
LOGIC INPUTS (ENABLE, CLKIN)
Logic Input High Voltage V
Logic Input Low Voltage V
CLOCK OUTPUT
Output High Voltage V
Output Low Voltage V
Output Rise Time t
Output Fall Time t
Duty Cycle (Note 3) 47 %
Startup Time Time for output to stabilize 2 ms
Output Jitter (Note 3)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
CC
CC2
I
TOT
SHDN
IH
IL
OH
OL
R
F
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
48MHz, MAX7394_ _ _ ZY 12
Oscillator disabled,
CLKIN = high (MAX7393),
ENABLE = low (MAX7394) (Note 2)
V
≥ 2.4V, I
CC2
V
≥ 2.4V, I
CC2
(Note 3) 5 ns
(Note 3) 5 ns
Peak-to-peak jitter, 16MHz (MAX7394) 180
Peak-to-peak jitter, 48MHz (MAX7394) 140
2.4 3.6 V
2.4 3.6 V
12µA
0.7
x V
CC2
0.3
x V
CC2
V
= 5mA
SOURCE
= 5mA 0.3 V
SINK
CC2
- 0.3
mA
V
V
V
ps
MAX7393/MAX7394
Precision Silicon Oscillators with
Enable or Autoenable
_______________________________________________________________________________________ 3
Note 1: All parameters are production tested at TA= +25°C. 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
= +25°C and TA= +85°C.
Note 5: Output frequency is production tested at T
A
= +25°C.
ELECTRICAL CHARACTERISTICS (continued)
(VCC= V
CC2
= +2.4V to +3.6V, CL= 10pF, TA= -40°C to +125°C, unless otherwise noted. Typical values are at VCC= V
CC2
= +3.3V,
T
A
= +25°C, unless otherwise noted.) (Note 1)
FREQUENCY ACCURACY
Clock Frequency Coefficient of
Temperature
Clock Frequency Coefficient of
Supply Voltage
Total Accuracy V
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
TA = 0°C to +70°C ±20
T
= -40°C to +125°C ±50
A
T
= 0°C to
A
+ 85°C ,
V
= ± 10%
C C
= - 40°C
T
A
to + 125° C ,
V
= ± 10%
C C
TD FN
( N ote 4)
µD FN
( N ote 5)
TD FN
( N ote 4)
µD FN
( N ote 5)
= V
= V
C C 2
C C 2
= 3.3V
= 3.3V
V
C C
= +25°C 0.1 0.15 %/V
T
A
C C
±0.25
±1.3
±1.0
±1.8
ppm/°C
%
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