MAXIM MAX4620, MAX4630, MAX4640 Technical data

Pin Configurations/Functional Diagrams/Truth Tables continued at end of data sheet.

General Description

The MAX4620/MAX4630/MAX4640 low-voltage, highESD-protected, quad, single-pole/single-throw (SPST) analog switches are pin-compatible replacements for the industry-standard 74HC4066 analog switch. The normally open (NO) and normally closed (NC) pins are protected against ±15kV electrostatic discharge (ESD) without latchup or damage. Each switch can handle Rail-to-Rail

®

analog signals. The off-leakage current is

0.5nA at +25°C. These analog switches are suitable for low-distortion audio applications and are the preferred solution over mechanical relays in automated test equipment or applications where current switching is required. They have low power requirements (0.5µW), require less board space, and are more reliable than mechanical relays. Each device is controlled by TTL/CMOS input voltage levels and is bilateral.

These switches feature guaranteed operation from a +2V to +12V single supply, making them ideal for use in battery-powered applications. The on-resistance is 70Ω max, matched between switches to 0.5Ω (typ), and flat (2Ω typ) over the specified signal range.

The MAX4620 has four NO switches, the MAX4630 has four NC switches, and the MAX4640 has two NO and two NC switches. These devices are available in 14-pin TSSOP, SO, and DIP packages.

________________________Applications

Battery-Powered Systems

Audio and Video Signal Routing

Low-Voltage Data-Acquisition Systems

Sample-and-Hold Circuits

Communications Circuits

Relay Replacement

____________________________Features

♦ ESD-Protected NO/NC Pins

±15kV Human Body Model ±15kV IEC 1000-4-2 Air-Gap Discharge ±8kV IEC 1000-4-2 Contact Discharge

♦ Pin Compatible with Industry-Standard 74HC4066,

MAX4066, MAX4610/MAX4611/MAX4612

♦ Guaranteed On-Resistance

70Ω (max) at 5V 120Ω (max) at 3V

♦ On-Resistance Flatness

2Ω (typ) at 5V 6Ω (typ) at 3V

♦ On-Resistance Matching

0.5Ω (typ) at 5V

0.6Ω (typ) at 3V

♦ Guaranteed 0.5nA Leakage Current at T

A

= +25°C

♦ +2V to +12V Single-Supply Voltage

♦ TTL/CMOS-Logic Compatible

♦ Low Distortion: 0.015%

♦ -3dB Bandwidth: >300MHz

♦ Rail-to-Rail Signal Range

MAX4620/MAX4630/MAX4640

±15kV ESD-Protected, Low-Voltage, Quad,

SPST, CMOS Analog Switches

________________________________________________________________ Maxim Integrated Products 1

19-1761; Rev 0; 7/00

For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769.

Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.

Ordering Information

Pin Configurations/Functional

Diagrams/Truth Tables

Ordering Information continued at end of data sheet.

PART

PIN-PACKAGE

MAX4620EUD

14 TSSOP

MAX4620ESD

14 SO

MAX4620EPD

14 DIP

MAX4630EUD

14 TSSOP

MAX4630ESD

14 SO

MAX4630EPD

14 DIP

TOP VIEW

MAX4620

14

13

12

11

10

9

8

1

2

3

4

5

6

7

TSSOP/SO/DIP

V+

IN1

IN4

NO4

COM4

COM3

NO3

COM2

NO2

COM1

NO1

GND

IN3

IN2

INPUT SWITCH STATE

LOW

HIGH

OFF

ON

TEMP. RANGE

-40°C to +85°C

MAX4620/MAX4630/MAX4640

±15kV ESD-Protected, Low-Voltage, Quad, SPST, CMOS Analog Switches

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS—SINGLE +5V SUPPLY

(V+ = +4.5V to +5.5V, VIH= 2.4V, VIL= 0.8V, TA= T

MIN

to T

MAX,

unless otherwise specified. Typical values are at V+ = +5V,

T

A

= +25°C.) (Note 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.

V+ to GND ..............................................................-0.3V to +13V

IN_, COM_, NO_, NC_ to GND (Note 1).......-0.3V to (V+ + 0.3V)

Continuous Current (NO_, NC_, COM_)...........................±10mA

Peak Current (NO_, NC_, COM_, pulsed at

1ms 10% duty cycle) ........................................................±30mA

ESD Protection per Method IEC 1000-4-2 (NO_, NC_)

Air-Gap Discharge .........................................................±15kV

Contact Discharge ...........................................................±8kV

ESD Protection per Method 3015.7

V+, GND, IN_, COM_ ....................................................±2.5kV

NO_, NC_ .......................................................................±15kV

Continuous Power Dissipation (T

A

= +70°C)

14-Pin TSSOP (derate 6.3mW/°C above +70°C) .........571mW

14-Pin DIP (derate 10mW/°C above +70°C)................800mW

14-Pin SO (derate 8mW/°C above +70°C)...................640mW

Operating Temperature Ranges

MAX46_ _E_....................................................-40°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

Maximum Die Temperature..............................................+150°C

Lead Temperature (soldering, 10s) .................................+300°C

Note 1: Signals on NO_, NC_, COM_, or IN_ exceeding V+ or GND are clamped by internal diodes. Limit forward current to maximum

current rating.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

ANALOG SWITCH

,

V

COM_

,

Input Voltage Range

V V

NO_

NC_

On-Resistance R

ON

V+ = 4.5V, I

= 1mA,

COM_

or

V

NO_

V

= 3.5V

NC_

TA = +25°C4570

= T

MIN

to T

MAX

T

A

0V+V

75

Ω

On-Resistance Match Between Channels (Note 3)

On-Resistance Flatness (Note 4)

Off-Leakage Current (NO_ or NC_) (Note 5)

∆R

ON

R

FLA T( ON )

I

NO_

I

NC_

,

V+ = 4.5V, I

= 1mA,

COM_

or

V

NO_

V

= 3.5V

NC_

V+ = 4.5V; I

= 1mA;

COM_

or

V

NO_

V

= 1V , 2.25V , 3.5V

N C _

V+ = 5.5V;

= 1V, 4.5V;

V

COM_

V

or

NO_

= 4.5V, 1V

V

NC_

TA = +25°C 0.5 2

= T

MIN

to T

MAX

T

A

TA = +25°C24

to T

= T

T

MIN

A

MAX

TA = +25°C -0.5 0.01 0.5

= T

MIN

to T

MAX

T

A

-5 5

Ω

3

Ω

5

nA

MAX4620/MAX4630/MAX4640

±15kV ESD-Protected, Low-Voltage, Quad,

SPST, CMOS Analog Switches

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS—SINGLE +5V SUPPLY (continued)

(V+ = +4.5V to +5.5V, VIH= 2.4V, VIL= 0.8V, TA= T

MIN

to T

MAX,

unless otherwise specified. Typical values are at V+ = +5V,

T

A

= +25°C.) (Note 2)

)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

ANALOG SWITCH

COM_ Off-Leakage Current (Note 5)

COM_ On-Leakage Current (Note 5)

I

COM_(OFF

I

COM_(ON

LOGIC INPUT

IN_ Input High V

IN_ Input Low V

Logic Input Leakage Current I

IH

IL

IN

SWITCH DYNAMIC CHARACTERISTICS

Turn-On Time t

ON

V+ = 5.5V;

= 1V, 4.5V;

V

COM_

V

or

NO_

= 4.5V, 1V

V

NC_

V+ = 5.5V; V

= 1V, 4.5V;

COM_

or V

V

NO_

4.5V, or floating

TA = +25°C -0.5 0.01 0.5

= T

MIN

to T

MAX

T

A

-5 5

TA = +25°C -1 0.02 1

= 1V,

NC_

T

= T

MIN

to T

MAX

A

-10 10

2.4 V

VIN = 0 or V+ -1 1 µA

V

= 3V,

COM_

= 300Ω,

R

L

C

= 35pF,

L

Figure 1

TA = +25°C 90 150

= T

MIN

to T

MAX

T

A

nA

0.8 V

ns

180

Turn-Off Time t

OFF

Break-Before-Make (MAX4640 only)

On-Channel Bandwidth -3dB BW

Charge Injection Q V

NO_ or NC_ On-Capacitance C

COM_ Off-Capacitance C

COM_ On-Capacitance C

Off-Isolation (Note 6) V

OFF

COM_(OFF

COM_(ON

ISO

V

= 3V,

COM_

C

= 35pF,

L

= 300Ω,

R

L

Figure 1

V

= 3V,

COM_

R

= 300Ω,

L

= 35pF

C

L

Signal = 0dBm, R C

= 5pF, Figure 2

L

= 2V, CL = 1.0nF, R

GEN

V

= V

NO_

V

= GND, f = 1MHz, Figure 3 12 pF

COM_

V

= V

COM_

IN

= GND, f = 1MHz, Figure 3 20 pF

NC_

, V

NO_

NC_

Figure 3

TA = +25°C5080

T

= T

MIN

to T

MAX

A

TA = +25°C545

T

= T

A

MIN

= R

= 50Ω,

OUT

= 0, Figure 4 5 pC

GEN

= GND, f = 1MHz,

to T

MAX

4

300 MHz

20 pF

RL = 50Ω, CL = 5pF, f = 1MHz, Figure 2 -75

RL = 50Ω, CL = 5pF, f = 10MHz, Figure 2 -45

ns

100

ns

dB

MAX4620/MAX4630/MAX4640

±15kV ESD-Protected, Low-Voltage, Quad, SPST, CMOS Analog Switches

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS—SINGLE +5V SUPPLY (continued)

(V+ = +4.5V to +5.5V, VIH= 2.4V, VIL= 0.8V, TA= T

MIN

to T

MAX,

unless otherwise specified. Typical values are at V+ = +5V,

T

A

= +25°C.) (Note 2)

ELECTRICAL CHARACTERISTICS—SINGLE +3V SUPPLY

(V+ = +2.7V to +3.6V, VIH= 2.0V, VIL= 0.6V, TA= T

MIN

to T

MAX,

unless otherwise specified. Typical values are at TA= +25°C.) (Note 2)

PARAMETER

Crosstalk (Note 7) V

SYMBOL

CT

Total Harmonic Distortion THD RL = 600Ω, f = 20Hz to 20kHz 0.015 %

E S D S i l i con- C ontr ol l ed Recti fi er ( S C R) H ol d i ng C ur r ent

ESD SCR Holding Voltage V

I

H

POWER SUPPLY

Power-Supply Range V+ 2 12 V

Positive Supply Current I+

ANALOG SWITCH

Input Voltage Range

On-Resistance R

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

,

V

COM_

,

V

NO_

V

NC_

ON

CONDITIONS

MIN TYP MAX UNITS

RL = 50Ω, CL = 5pF, f = 1MHz, Figure 5 -90

RL = 50Ω, CL = 5pF, f = 10MHz, Figure 5 -70

110 mA

3V

V+ = 5.5V,

= 0 or V+

V

IN

TA = +25°C1

T

= T

MIN

to T

MAX

A

0V+V

V+ = 2.7V, I

= 1mA,

COM_

or

V

NO_

V

= 1.5V

NC_

TA = +25°C 70 120

= T

MIN

to T

MAX

T

A

150

10

dB

µA

Ω

On-Resistance Match Between Channels (Notes 3, 8)

On-Resistance Flatness (Notes 4, 8)

∆R

ON

R

FLA T( ON )

V+ = 2.7V, I

= 1mA,

COM_

or

V

NO_

V

= 1.5V

NC_

V + = 2.7;

= 1m A;

I

C OM_

V

or

N O_

= 0.5V, 1.5V , 2.2V

V

N C _

TA = +25°C 0.6 3

Ω

= T

MIN

to T

MAX

T

A

4

TA = +25°C612

Ω

= T

MIN

to T

MAX

T

A

15

LOGIC INPUT

IN_ Input High V

IN_ Input Low V

Logic Input Leakage Current I

IH

IL

IN

V

= 0 or V + -1 1 µA

IN

2.0 V

0.6 V

MAX4620/MAX4630/MAX4640

±15kV ESD-Protected, Low-Voltage, Quad,

SPST, CMOS Analog Switches

_______________________________________________________________________________________ 5

Note 2: The algebraic convention, where the most negative value is a minimum and the most positive value is a maximum, is used in

this data sheet.

Note 3: ∆R

ON

= R

ON(MAX)

- R

ON(MIN)

.

Note 4: Flatness is defined as the difference between the maximum and the minimum values of on-resistance as measured over the

specified analog signal ranges.

Note 5: Leakage parameters are 100% tested at T

A(max

), and guaranteed by correlation at +25°C.

Note 6: Off-Isolation = 20log

10(VCOM

/ VNO), V

COM

= output, VNO= input to off switch.

Note 7: Between any two switches. Note 8: Guaranteed by design.

ELECTRICAL CHARACTERISTICS—SINGLE +3V SUPPLY (continued)

(V+ = +2.7V to +3.6V, VIH= 2.0V, VIL= 0.6V, TA= T

MIN

to T

MAX,

unless otherwise specified. Typical values are at TA= +25°C.) (Note

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SWITCH DYNAMIC CHARACTERISTICS

V

Turn-On Time t

ON

R C Figure 1

V

Turn-Off Time t

OFF

R C Figure 1

Break-Before-Make (MAX4640 only)

V R C

Charge Injection Q V

ESD SCR H ol d i ng C ur r ent I

ESD SCR Holding Voltage V

H

POWER SUPPLY

Power-Supply Range V+ 2 12 V

Positive Supply Current I+

V+ = 3.6V, V

_ = 1.5V,

COM

= 300Ω,

L

= 35pF,

L

_ = 1.5V,

COM

= 300Ω,

L

= 35pF,

L

_ = 1.5V,

COM

= 300Ω,

L

= 35pF

L

= 1.5V , C

GE N

= 0 or V+

IN

TA = +25°C 150 250

T

= T

MIN

to T

MAX

A

300

TA = +25°C 60 100

T

= T

A

MAX

to T

MIN

150

TA = +25°C5

T

= T

= 1.0nF, R

L

A

GE N

to T

MIN

MAX

= 0, Fi g ur e 4 5 pC

4

110 mA

3V

TA = +25°C1

T

= T

MIN

to T

MAX

A

10

ns

µA

MAX4620/MAX4630/MAX4640

±15kV ESD-Protected, Low-Voltage, Quad, SPST, CMOS Analog Switches

6 _______________________________________________________________________________________

Typical Operating Characteristics

(V+ = +5V, TA = +25°C, unless otherwise specified.)

ON-RESISTANCE vs. V

COM

AND

SUPPLY VOLTAGE

180

160

140

120

100

(Ω)

ON

R

80

60

40

20

0

V+ = 1.8V

V+ = 2.5V

V+ = 3.3V

V+ = 5V

0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 V

(V)

COM

MAX4620/30/40-01

(Ω)

ON

R

SUPPLY CURRENT vs. SUPPLY

VOLTAGE AND TEMPERATURE

12

V+ = 5V

10

8

6

4

SUPPLY CURRENT (nA)

2

0

-40 -15 10 35 60 85 TEMPERATURE (°C)

MAX4620/30/40-04

TURN-ON/TURN-OFF TIME

(V+ = +3V)

vs. V

140

120

100

80

(ns)

OFF

/t

60

ON

t

40

20

0

0 0.5 1.0 1.5 2.0 2.5 3.0

COM

t

ON

t

OFF

V

COM

(V)

MAX4620/30/40-07

(ns)

/t t

ON-RESISTANCE vs. V

COM

TEMPERATURE

60

50

40

30

TA = +85°C

20

10

0

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

TA = +25°C

V

(V)

COM

TURN-ON/TURN-OFF TIME

vs. TEMPERATURE

100

V+ = 5V

90

= 3V

V

COM

80

70

60

(ns)

50

OFF

/t

ON

40

t

30

20

10

0

-40 -15 10 35 60 85

t

ON

t

OFF

TEMPERATURE (°C)

TURN-ON/TURN-OFF TIME

COM

V

COM

(V+ = +5V)

t

ON

t

OFF

(V)

vs. V

90

80

70

60

50

OFF

40

ON

30

20

10

0

1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

AND

TA = -40°C

1000

MAX4620/30/40-02

100

10

LEAKAGE CURRENT (pA)

1

140

120

MAX4620/30/40-05

100

80

(ns)

OFF

/t

60

ON

t

40

20

0

20

15

MAX4620/30/40-08

10

5

0

CHARGE INJECTION (pC)

-5

-10

ON/OFF-LEAKAGE CURRENT

vs. TEMPERATURE

MAX4620/30/40-03

ON

OFF

-40 85603510-15 TEMPERATURE (°C)

TURN-ON/TURN-OFF TIME

vs. SUPPLY VOLTAGE

MAX4620/30/40-06

t

ON

t

OFF

036912

01 2345

SUPPLY VOLTAGE (V)

CHARGE INJECTION vs. V

V+ = 3V

V+ = 5V

V

(V)

COM

MAX4620/30/40-09

MAX4620/MAX4630/MAX4640

±15kV ESD-Protected, Low-Voltage, Quad,

SPST, CMOS Analog Switches

_______________________________________________________________________________________ 7

Typical Operating Characteristics (continued)

(V+ = +5V, TA = +25°C, unless otherwise specified.)

20

-120

0.01 0.1 1 10 100 1000

FREQUENCY RESPONSE

-100

MAX4620/30/40-10

FREQUENCY (MHz)

LOSS (dB)

-60

-40

-80

-20

0

ON-LOSS

OFF

CROSSTALK

0.016

0.014

0.012

0.010

0.008

0.006

0.004

0.002

0

10 1k 10k100 100k

TOTAL HARMONIC DISTORTION

PLUS NOISE vs. FREQUENCY

MAX4620/30/40-11

FREQUENCY (Hz)

THD + N (%)

V+ = 5V 600Ω IN AND OUT

Pin Description

MAX4620 MAX4630 MAX4640

1 — 1 NO1 Analog Switch 1 – Normally Open

— 1 — NC1 Analog Switch 1 – Normally Closed

2 2 2 COM1 Analog Switch 1 – Common

3 — 3 NO2 Analog Switch 2 – Normally Open

— 3 — NC2 Analog Switch 2 – Normally Closed

4 4 4 COM2 Analog Switch 2 – Common

5 5 5 IN2 Digital Control Input 2

6 6 6 IN3 Digital Control Input 3

7 7 7 GND Ground

8 ——NO3 Analog Switch 3 – Normally Open

— 8 8 NC3 Analog Switch 3 – Normally Closed

9 9 9 COM3 Analog Switch 3 – Common

10 10 10 COM4 Analog Switch 4 – Common

11 ——NO4 Analog Switch 4 – Normally Open

— 11 11 NC4 Analog Switch 4 – Normally Closed

12 12 12 IN4 Digital Control Input 4

13 13 13 IN1 Digital Control Input 1

14 14 14 V+ Positive Supply Voltage Input

NAME FUNCTION

MAX4620/MAX4630/MAX4640

±15kV ESD-Protected, Low-Voltage, Quad, SPST, CMOS Analog Switches

8 _______________________________________________________________________________________

Figure 1. Switching Time

Figure 3. Channel Off/On-Capacitance

Figure 2. Off-Isolation/On-Channel Bandwidth

MAX4620 MAX4630 MAX4640

SWITCH

INPUT

LOGIC

INPUT

V

COM_

COM

IN

GND

CL INCLUDES FIXTURE AND STRAY CAPACITANCE.

V

= V

OUT

COM (

RL + R

R

L

V+

)

ON

NO_/NC_

R

L

300Ω

SWITCH OUTPUT

C

L

35pF

V

OUT

SWITCH

OUTPUT

10nF

V+

MAX4620 MAX4630 MAX4640

SIGNAL GENERATOR 0dBm

ANALYZER

R

L

V+

COM_

NO_/NC_

GND

IN

V

OR

IL

V

IH

CAPACITANCE

METER

f = 1MHz

LOGIC INPUT

t

OFF

tR < 20ns t

< 20ns

F

0.9 x V

OUT

IN

MAX4620 MAX4630 MAX4640

VIL OR

V

IH

V+

0

50%

V

OUT

t

ON

10nF

0.9 x V

V+

COM_

NO_/NC_

GND

0UT

MAX4620/MAX4630/MAX4640

±15kV ESD-Protected, Low-Voltage, Quad,

SPST, CMOS Analog Switches

_______________________________________________________________________________________ 9

Detailed Description

The MAX4620/MAX4630/MAX4640 are quad SPST CMOS analog switches with circuitry providing ±15kV ESD protection on the NO and NC pins. The CMOS switch construction provides rail-to-rail signal handling while consuming virtually no power. Each of the four switches is independently controlled by a TTL/CMOSlevel-compatible digital input.

Applications Information

Do not exceed the absolute maximum ratings because stresses beyond the listed ratings may cause permanent damage to the device.

Proper power-supply sequencing is recommended for all CMOS devices. Always sequence V+ on first, followed by the logic inputs, NO/NC, or COM.

Operating Considerations for

High-Voltage Supply

The MAX4620/MAX4630/MAX4640 are capable of +12V single-supply operation with some precautions. The absolute maximum rating for V+ is 13V (referenced to GND). When operating near this region, bypass V+ with a minimum 0.1µF capacitor to ground as close to the IC as possible.

Figure 4. Charge Injection

Figure 5. Crosstalk

MAX4620 MAX4630 MAX4640

V

GEN

R

GEN

COM_

GND

NO_/NC_

IN

V+

V

OUT

C

L

V

OUT

∆V

OUT

SIGNAL GENERATOR 0dBm

0 OR 2.4V

ANALYZER

R

L

10nF

COM1

IN1

NO2

V+

GND

V

IN

NO1

IN2

COM2

MAX4620 MAX4630 MAX4640

50Ω

0 OR

2.4V

NC

Q = (∆V

ON

OUT

OFF

)(CL)

OFF

IN

MAX4620/MAX4630/MAX4640

±15kV ESD-Protected, Low-Voltage, Quad, SPST, CMOS Analog Switches

10 ______________________________________________________________________________________

±15kV ESD Protection

The MAX4620/MAX4630/MAX4640 are ±15kV ESD-protected at the NC/NO terminals. To accomplish this, bidirectional SCRs are included on-chip between these terminals. When the voltages at these terminals go Beyond-the-RailsTM, the corresponding SCR turns on in a few nanoseconds and bypasses the surge safely to ground. This method is superior to using diode clamps to the supplies because unless the supplies are very carefully decoupled through low ESR capacitors, the ESD current through the diode clamp could cause a significant spike in the supplies. This may damage or compromise the reliability of any other chip powered by those same supplies.

There are diodes from NC/NO to the supplies in addition to the SCRs. There is a resistance in series with each of these diodes to limit the current into the supplies during an ESD strike. The diodes protect these terminals from overvoltages that are not a result of ESD strikes. These diodes also protect the device from improper power-supply sequencing.

Once the SCR turns on because of an ESD strike, it continues to be on until the current through it falls below its “holding current.” The holding current is typically 110mA in the positive direction (current flowing into the NC/NO terminal) at room temperature (see Supply Current vs. Temperature in the Typical Operating Characteristics). Design the system so that any sources connected to NC/NO are current limited to a value below the holding current to ensure the SCR turns off when the ESD event is finished and normal operation is resumed. Also, keep in mind that the holding current varies significantly with temperature. The worst case is at +85°C when the holding currents drop to 70mA. Since this is a typical number to guarantee turn-off of the SCRs under all conditions, the sources connected to these terminals should be current limited to not more than half this value. When the SCR is latched, the voltage across it is approximately 3V, depending on the polarity of the pin current. The supply voltages do not appreciably affect the holding current. The sources connected to the COM side of the switches do not need to be current limited since the switches turn off internally when the corresponding SCR(s) latches.

Even though most of the ESD current flows to GND through the SCRs, a small portion of it goes into V+. Therefore, it is a good idea to bypass the V+ with 0.1µF capacitors directly to the ground plane.

ESD protection can be tested in various ways. Transmitter outputs and receiver inputs are characterized for protection to the following:

• ±15kV using the Human Body Model

• ±8kV using the Contact Discharge method speci-

fied in IEC 1000-4-2 (formerly IEC 801-2)

• ±15kV using the Air-Gap Discharge method specified in IEC 1000-4-2 (formerly IEC 801-2)

ESD Test Conditions

Contact Maxim Integrated Products for a reliability report that documents test setup, methodology, and results.

Human Body Model

Figure 6 shows the Human Body Model, and Figure 7 shows the waveform it generates when discharged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest, which can be discharged into the test device through a 1.5kΩ resistor.

IEC 1000-4-2

The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment; it does not specifically refer to ICs. The MAX4620/MAX4630/MAX4640 enable the design of equipment that meets Level 4 (the highest level) of IEC 1000-4-2, without additional ESD protection components.

The major difference between tests done using the Human Body Model and IEC 1000-4-2 is higher peak current in IEC 1000-4-2. Because series resistance is lower in the IEC 1000-4-2 ESD test model (Figure 8), the ESD withstand voltage measured to this standard is generally lower than that measured using the Human Body Model. Figure 9 shows the current waveform for the ±8kV IEC 1000-4-2 Level 4 ESD Contact Discharge test.

The Air-Gap test involves approaching the device with a charged probe. The Contact Discharge method connects the probe to the device before the probe is energized.

Chip Information

TRANSISTOR COUNT: 156

PROCESS: CMOS

Beyond-the-Rails is a trademark of Maxim Integrated Products.

MAX4620/MAX4630/MAX4640

±15kV ESD-Protected, Low-Voltage, Quad,

SPST, CMOS Analog Switches

______________________________________________________________________________________ 11

Figure 7. Human Body Model Current Waveform

Figure 6. Human Body ESD Test Model

Figure 9. IEC 1000-4-2 ESD Generator Current Waveform

Figure 8. IEC 1000-4-2 ESD Test Model

R

D

1500Ω

DISCHARGE

RESISTANCE

STORAGE CAPACITOR

HIGH-

VOLTAGE

DC

SOURCE

R

C

1MΩ

CHARGE-CURRENT

LIMIT RESISTOR

C

s

100pF

R

D

330Ω

DISCHARGE

RESISTANCE

STORAGE CAPACITOR

HIGH-

VOLTAGE

DC

SOURCE

R

C

50MΩ to 100MΩ

CHARGE-CURRENT

LIMIT RESISTOR

C

s

150pF

DEVICE

UNDER

TEST

DEVICE UNDER

TEST

PEAK-TO-PEAK RINGING

I

r

(NOT DRAWN TO SCALE)

AMPERES

IP 100%

90%

36.8%

10%

0

t

RL

TIME

t

DL

CURRENT WAVEFORM

I

100%

90%

PEAK

I

10%

tr = 0.7ns to 1ns

30ns

60ns

t

MAX4620/MAX4630/MAX4640

±15kV ESD-Protected, Low-Voltage, Quad, SPST, CMOS Analog Switches

12 ______________________________________________________________________________________

Pin Configurations/Functional Diagrams/Truth Tables (continued)

Ordering Information (continued)

TOP VIEW

MAX4630

NC1

COM1

NC2

COM2

IN2

IN3

GND

1

2

3

4

5

6

7

14

V+

IN1

13

12

IN4

11

NC4

10

COM4

COM3

9

8

NC3

TSSOP/SO/DIP

INPUT SWITCH STATE

LOW

HIGH

PART TEMP. RANGE PIN-PACKAGE

MAX4640EUD -40°C to +85°C 14 TSSOP

ON

OFF

MAX4640ESD -40°C to +85°C 14 SO

MAX4640EPD -40°C to +85°C 14 DIP

MAX4640

1

NO1

COM1

2

3

NO2

4

COM2

5

IN2

IN3

6

7

GND

TSSOP/SO/DIP

INPUT NO1, NO2

LOW HIGH

OFF

ON

14

V+

IN1

13

12

IN4

11

NC4

10

COM4

COM3

9

8

NC3

NC3, NC4

ON

OFF

MAX4620/MAX4630/MAX4640

±15kV ESD-Protected, Low-Voltage, Quad,

SPST, CMOS Analog Switches

______________________________________________________________________________________ 13

Package Information

TSSOP.EPS

MAX4620/MAX4630/MAX4640

±15kV ESD-Protected, Low-Voltage, Quad, SPST, CMOS Analog Switches

14 ______________________________________________________________________________________

Package Information (continued)

SOICN.EPS

MAX4620/MAX4630/MAX4640

±15kV ESD-Protected, Low-Voltage, Quad,

SPST, CMOS Analog Switches

______________________________________________________________________________________ 15

Package Information (continued)

PDIPN.EPS

MAX4620/MAX4630/MAX4640

±15kV ESD-Protected, Low-Voltage, Quad, SPST, CMOS Analog Switches

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.

16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

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.

16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

NOTES

MAXIM MAX4620, MAX4630, MAX4640 Technical data

Specifications and Main Features

Frequently Asked Questions

User Manual