MAX7393ATTOK-T - Maxim Integrated Products, Inc.

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% (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 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 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.

PA R T * T EM P RA N G EPIN -

PA C K A G E

PK G

C O D 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

*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

VCC2

2.4V TO 3.6V

GNDI.C.

VCC

1µC

CLOCK 5OSC1

CLKIN 4OSC2

MAX7394

VCC2

2.4V TO 3.6V

ENABLE

GNDI.C.

VCC

1µC

CLOCK 5OSC1

OSC2

MAX7393/MAX7394

Precision Silicon Oscillators with

Enable or Autoenable

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC = VCC2 = +2.4V to +3.6V, CL= 10pF, TA= -40°C to +125°C, unless otherwise noted. Typical values are at VCC = VCC2 = +3.3V,

TA= +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, VCC2 to GND.................................................-0.3V to +4.0V

CLOCK, CLKIN, ENABLE, I.C. to GND ......-0.3V to (VCC + 0.3V)

CLOCK Output Current ....................................................±50mA

Continuous Power Dissipation (TA= +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

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DC CHARACTERISTICS

Operating Supply Voltage VCC 2.4 3.6 V

Operating Output Supply Voltage VCC2 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) ITOT

48MHz, MAX7394_ _ _ ZY 12

Total Shutdown Supply Current ISHDN

Oscillator disabled,

CLKIN = high (MAX7393),

ENABLE = low (MAX7394) (Note 2)

12µA

LOGIC INPUTS (ENABLE, CLKIN)

Logic Input High Voltage VIH 0.7

x VCC2 V

Logic Input Low Voltage VIL 0.3

x VCC2 V

CLOCK OUTPUT

Output High Voltage VOH VCC2 ≥ 2.4V, ISOURCE = 5mA VCC2

- 0.3 V

Output Low Voltage VOL VCC2 ≥ 2.4V, ISINK = 5mA 0.3 V

Output Rise Time tR(Note 3) 5 ns

Output Fall Time tF(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 TA= +25°C. Specifications over temperature are guaranteed by design and

characterization.

Note 2: The total supply current is the sum of ICC and ICC2.

Note 3: Guaranteed by design and characterization. Not production tested.

Note 4: Output frequency is production tested at TA= +25°C and TA= +85°C.

Note 5: Output frequency is production tested at TA= +25°C.

ELECTRICAL CHARACTERISTICS (continued)

(VCC = VCC2 = +2.4V to +3.6V, CL= 10pF, TA= -40°C to +125°C, unless otherwise noted. Typical values are at VCC = VCC2 = +3.3V,

TA= +25°C, unless otherwise noted.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

FREQUENCY ACCURACY

TA = 0°C to +70°C ±20

Clock Frequency Coefficient of

Temperature V

C C

= V

C C 2

= 3.3V TA = -40°C to +125°C ±50 ppm/°C

Clock Frequency Coefficient of

Supply Voltage TA = +25°C 0.1 0.15 %/V

TD FN

( N ote 4) ±0.25

TA = 0°C to

+ 85°C ,

C C

= ± 10% µD FN

( N ote 5) ±1.3

TD FN

( N ote 4) ±1.0

Total Accuracy V

C C

= V

C C 2

= 3.3V

TA = - 40°C

to + 125° C ,

C C

= ± 10% µD 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

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

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

VCC = VCC2 = +3.6V

VCC = VCC2 = +2.4V

VCC = VCC2 = +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

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

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

VCC = VCC2 = +2.4V

VCC = VCC2 = +3.3V

VCC = VCC2 = +3.6V

MAX7393 SETTLING TIME FROM START

MAX7393 toc08

CLOCK

2V/div

ON/OFF

2V/div

(SEE FIGURE 1)

20MHz

400µs/div

Typical Operating Characteristics

(VCC = VCC2 = 3.3V, TA= +25°C, MAX7394, 48MHz output, unless otherwise noted.)

MAX7393/MAX7394

Precision Silicon Oscillators with

Enable or Autoenable

_______________________________________________________________________________________ 5

Pin Description

MAX7393 MAX7394 NAME FUNCTION

11V

CC Positive Supply Voltage Input. Bypass VCC to GND with 0.1µF capacitors placed as close to

the device as possible. Connect VCC to VCC2.

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.

66V

CC2 Positive Supply Voltage Input for Output Driver. Bypass VCC2 to GND with a 0.1µF capacitor

placed as close to the device as possible. Connect VCC2 to VCC.

— 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

400µs/div

CLOCK OUTPUT WAVEFORM

WITH CL = 10pF

MAX7393 toc10

CLOCK

1V/div

10ns/div

Typical Operating Characteristics (continued)

(VCC = VCC2 = 3.3V, TA= +25°C, MAX7394, 48MHz output, unless otherwise noted.)

MAX7393/MAX7394

Detailed Description

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 consist of

a temperature-compensated precision oscillator with

enable (MAX7394) or autoenable (MAX7393). The

ENABLE input on the MAX7394 manually enables or dis-

ables the oscillator. The CLKIN input on the MAX7393

monitors a returned clock signal to automatically enable

or disable the MAX7393 oscillator.

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.

ENABLE (MAX7394)

The ENABLE input on the MAX7394 turns the oscillator

on and off. Drive ENABLE to a logic-high for normal

operation. Drive ENABLE to a logic-low to place the

device in shutdown mode. During shutdown, the oscilla-

tor is turned off, and the CLOCK output is weakly driven

high with an internal 10kΩto VCC2. In shutdown mode,

the total supply current reduces to less than 2µA.

Autoenable (CLKIN, MAX7393)

The MAX7393 features a CLKIN input that automatically

enables or disables the oscillator by sensing the condi-

tion of a returned clock signal. The MAX7393 is auto-

matically enabled whenever an active inversion function

is sensed between CLOCK and CLKIN. When no inver-

sion 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.

The CLKIN input relies on an external inversion func-

tion, typically provided by a microcontroller’s clock

generator, to provide an inverted version of the CLOCK

output signal. The MAX7393 interprets high/low voltage

or a constant high-impedance node on CLKIN as a

disable signal.

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.

Oscillator (CLOCK)

The CLOCK output is a push-pull, CMOS logic output

that is capable of driving a ground-connected 1kΩload

or a positive supply connected 500Ωload to within

300mV of either supply rail. There are no impedance-

matching issues when using the MAX7393/MAX7394

CLOCK output. A typical startup characteristic is shown

in the Typical Operating Characteristics.

Output Jitter

The MAX7393/MAX7394s’ jitter performance is given in the

Electrical Characteristics table as a peak-to-peak value.

Applications Information

Interfacing to a Microcontroller

Clock Input

The MAX7393/MAX7394 CLOCK output is a push-pull,

CMOS logic output that directly drives any micro-

processor (µP) or microcontroller (µC) clock input. There

are no impedance-matching issues when using the

MAX7393/MAX7394. Operate the MAX7393/MAX7394

and microcontroller from the same supply voltage level of

VCC2 (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 compo-

nents or load capacitance. When using the MAX7393/

MAX7394 to retrofit a crystal oscillator, remove all bias-

ing components from the oscillator input.

Power-Supply Considerations

The MAX7393/MAX7394 operate with power-supply

voltages in the +2.4V to +3.6V range. Connect VCC and

VCC2 to the same supply voltage level as the device

receiving the clock. Proper power-supply decoupling is

required to maintain the power-supply rejection perfor-

mance of the MAX7393/MAX7394. Connect 0.1µF

surface-mount ceramic capacitors from VCC to VCC2 to

GND. Position these bypass capacitors as close to VCC

and VCC2 as possible.

A larger VCC2 bypass capacitor value is recommended

if the MAX7393/MAX7394 are to operate with a large

capacitive load. Use a bypass capacitor value on VCC2

at least 1000 times that of the output load capacitance.

Precision Silicon Oscillators with

Enable or Autoenable

6 _______________________________________________________________________________________

MAX7393

CLOCK

CLKIN

ON/OFF

Figure 1. Test Circuit to Enable or Disable the MAX7393 Oscillator

MAX7393/MAX7394

Precision Silicon Oscillators with

Enable or Autoenable

_______________________________________________________________________________________ 7

123

*EP

*EXPOSED PADDLE. CONNECT EP TO GROUND.

VCC2 CLOCK CLKIN

VCC GND I.C.

MAX7393

TDFN

TOP VIEW OF

BOTTOM LEADS

123

*EP

*EXPOSED PADDLE. CONNECT EP TO GROUND.

VCC2 CLOCK ENABLE

VCC GND I.C.

MAX7394

TDFN

123

456

VCC2 CLOCK ENABLE

VCC GND I.C.

MAX7394

µDFN

123

456

VCC2 CLOCK CLKIN

VCC GND I.C.

MAX7393

µDFN

Pin Configurations Selector Guide

PART F R EQ U ENC YPA CK A G ET O P M A RK

M AX 7393ATTLY 922kH z6 TD FN + AN P

M AX 7393ALTLY 922kH z6 µD FN + ABO

M AX 7393ATTM G1M H z6 TD FN + AN Q

M AX 7393ALTM G1M H z6 µD FN + ABP

M AX 7393ATTRD 4M H z6 TD FN + AN R

M AX 7393ALTRD 4M H z6 µD FN + ABQ

M AX 7393ATTTP 8M H z6 TD FN + AN S

M AX 7393ALTTP 8M H z6 µD FN + ABR

M AX 7393ATTWB 16M H z6 TD FN + AM N

M AX 7393ALTWB 16M H z6 µD FN + AAR

M AX 7393ATTWV 20M H z6 TD FN + AM O

M AX 7393ALTWV 20M H z6 µD FN + AAS

M AX 7394ATTLY 922kH z6 TD FN + AN V

M AX 7394ALTLY 922kH z6 µD FN + ABU

M AX 7394ATTM G1M H z6 TD FN + AN W

M AX 7394ALTM G1M H z6 µD FN + ABV

M AX 7394ATTRD 4M H z6 TD FN + AN X

M AX 7394ALTRD 4M H z6 µD FN + ABW

M AX 7394ATTTP 8M H z6 TD FN + AN Y

M AX 7394ALTTP 8M H z6 µD FN + ABX

M AX 7394ATTWB 16M H z6 TD FN + AM U

M AX 7394ALTWB 16M H z6 µD FN + AAY

M AX 7394ATTWV 20M H z6 TD FN + AM V

M AX 7394ALTWV 20M H z6 µD FN + AAZ

M AX 7394ATTY N 32M H z6 TD FN + AN Z

M AX 7394ALTY N 32M H z6 µD FN + ABY

M AX 7394ATTY Q 33M H z6 TD FN + AM X

M AX 7394ALTY Q 33M H z6 µD FN + ABB

M AX 7394ATTZ H 40M H z6 TD FN + AO A

M AX 7394ALTZ H 40M H z6 µD FN + ABZ

M AX 7394ATTZ Y 48M H z6 TD FN + AM Z

M AX 7394ALTZ Y 48M H z6 µD FN + ABD

Chip Information

PROCESS: BiCMOS

MAX7393/MAX7394

Precision Silicon Oscillators with

Enable or Autoenable

8 _______________________________________________________________________________________

6, 8, &10L, DFN THIN.EPS

21-0137

PACKAGE OUTLINE, 6,8,10 & 14L,

TDFN, EXPOSED PAD, 3x3x0.80 mm

COMMON DIMENSIONS

SYMBOL MIN. MAX.

A 0.70 0.80

D 2.90 3.10

E 2.90 3.10

A1 0.00 0.05

L 0.20 0.40

PKG. CODE N D2 E2 eJEDEC SPEC b[(N/2)-1] x e

PACKAGE VARIATIONS

0.25 MIN.k

A2 0.20 REF.

2.30±0.101.50±0.106T633-1 0.95 BSC MO229 / WEEA 1.90 REF0.40±0.05

1.95 REF0.30±0.050.65 BSC2.30±0.108T833-1

2.00 REF0.25±0.050.50 BSC2.30±0.1010T1033-1

2.40 REF0.20±0.05- - - - 0.40 BSC1.70±0.10 2.30±0.1014T1433-1

1.50±0.10

MO229 / WEEC

MO229 / WEED-3

0.40 BSC - - - - 0.20±0.05 2.40 REFT1433-2 14 2.30±0.101.70±0.10

T633-2 6 1.50±0.10 2.30±0.10 0.95 BSC MO229 / WEEA 0.40±0.05 1.90 REF

T833-2 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF

T833-3 8 1.50±0.10 2.30±0.10 0.65 BSC MO229 / WEEC 0.30±0.05 1.95 REF

-DRAWING NOT TO SCALE- H

21-0137

PACKAGE OUTLINE, 6,8,10 & 14L,

TDFN, EXPOSED PAD, 3x3x0.80 mm

2.30±0.10 MO229 / WEED-3 2.00 REF0.25±0.05

0.50 BSC

1.50±0.1010T1033-2

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.maxim-ic.com/packages.)

MAX7393/MAX7394

Precision Silicon Oscillators with

Enable or Autoenable

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.

Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 9

6, 8, 10L UDFN.EPS

EVEN TERMINAL

ODD TERMINAL

PIN 1

INDEX AREA

SOLDER

MASK

COVERAGE

A A

PIN 1

0.10x45∞

LL1

(N/2 -1) x e)

XXXX

SAMPLE

MARKING

21-0164

PACKAGE OUTLINE,

6, 8, 10L uDFN, 2x2x0.80 mm

-DRAWING NOT TO SCALE-

COMMON DIMENSIONS

SYMBOL MIN. NOM.

A0.70 0.75

D1.95 2.00

E1.95 2.00

L0.30 0.40

PKG. CODE N e b

PACKAGE VARIATIONS

6L622-1 0.65 BSC 0.30±0.05

0.25±0.050.50 BSC8L822-1

0.20±0.030.40 BSC10L1022-1

2.05

0.80

MAX.

0.50

2.05

0.10 REF.

(N/2 -1) x e

1.60 REF.

1.50 REF.

1.30 REF.

-DRAWING NOT TO SCALE-

21-0164

PACKAGE OUTLINE,

6, 8, 10L uDFN, 2x2x0.80 mm

0.15 0.20 0.25

0.020 0.025 0.035

Package Information (continued)

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,

go to www.maxim-ic.com/packages.)

Springer