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19-1782; Rev 3; 10/12

MAX4638/MAX4639

3.5

, Single 8:1 and Dual 4:1,

Low-Voltage Analog Multiplexers

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.

General Description

The MAX4638/MAX4639 are single 8:1 and dual 4:1

CMOS analog multiplexers/demultiplexers (muxes/

demuxes). Each mux operates from a single +1.8V to

+5V supply or dual ±2.5V supplies. These devices fea-

ture 3.5Ω on-resistance (R

) when powered with a

single +5V supply and have -75dB off-isolation and

-85dB crosstalk from the output to each off channel.

The switching times are 18ns t

and 7ns t

OFF

. They

feature a -3dB 85MHz bandwidth and a guaranteed

0.25nA leakage current at +25°C.

A +1.8V to +5.5V operating range makes the MAX4638/

MAX4639 ideal for battery-powered, portable instru-

ments. All channels guarantee break-before-make

switching. These parts feature bidirectional operation

and can handle Rail-to-Rail

analog signals. All control

inputs are TTL/CMOS-logic compatible. Decoding is in

standard BCD format, and an enable input is provided to

simplify cascading of devices. These devices are avail-

able in small 16-pin TQFN, TSSOP, and SO packages, as

well as a 20-pin TQFN package.

Applications

Automatic Test Equipment

Low-Voltage Data-Acquisition Systems

Audio and Video Signal Routing

Medical Equipment

Battery-Powered Equipment

Relay Replacement

Features

♦ Guaranteed R

3.5Ω (+5V or ±2.5V Supplies)

6Ω (+3V Supply)

♦ Guaranteed 0.4Ω R

Match Between Channels

♦ Guaranteed 1Ω R

Flatness Over Signal Range

♦ Guaranteed Low Leakage Currents

0.25nA at +25°C

♦ Switching Times: t

= 18ns, t

OFF

= 7ns

♦ +1.8V to +5.5V Single-Supply Operation

±2.5V Dual-Supply Operation

♦ Rail-to-Rail Signal Handling

♦ TTL/CMOS-Logic Compatible

♦ Crosstalk: -80dB (1MHz)

♦ Off-Isolation: -60dB (10MHz)

Ordering Information

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

PART TEMP RANGE PIN-PACKAGE

MAX4638ETE+T -40°C to +85°C 16 TQFN-EP* (4

 4)

MAX4638EUE+T -40°C to +85°C 16 TSSOP

MAX4638ESE+T -40°C to +85°C 16 SO

MAX4638ETP+T -40°C to +85°C 20 TQFN-EP* (4  4)

GND

V+

NO1

V-

TOP VIEW

MAX4638

NO5

NO6

NO7

NO8

COM

NO4

NO3

NO2

TSSOP/SO

LOGIC

GND

V+

NO1B

NO1A

V-

MAX4639

NO2B

NO3B

NO4B

COMB

COMA

NO4A

NO3A

NO2A

TSSOP/SO

LOGIC

Pin Configurations/Functional Diagrams

Ordering Information continued at end of data sheet.

Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape and reel.

EP = Exposed pad.

Summary of content (14 pages)

PAGE 1
MAX4638/MAX4639 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers General Description The MAX4638/MAX4639 are single 8:1 and dual 4:1 CMOS analog multiplexers/demultiplexers (muxes/ demuxes). Each mux operates from a single +1.8V to +5V supply or dual ±2.5V supplies. These devices feature 3.5Ω on-resistance (RON) when powered with a single +5V supply and have -75dB off-isolation and -85dB crosstalk from the output to each off channel. The switching times are 18ns tON and 7ns tOFF.
PAGE 2
MAX4638/MAX4639 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers ABSOLUTE MAXIMUM RATINGS (Voltages Referenced to GND) V+ to V- .................................................................................+6V V+, A_, EN ................................................................-0.3V to +6V V- ............................................................................+0.3V to -6V NO_, COM_ (Note 1) ................................... -0.3V to (V+ + 0.3V) Continuous Current A_, EN ...
PAGE 3
MAX4638/MAX4639 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers (V+ = +5V ±10%, V- = 0, VIH = +2.4V, VIL = +0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 4
MAX4638/MAX4639 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers ELECTRICAL CHARACTERISTICS—+3.0V Single Supply (V+ = +2.7V to +3.3V, V- = 0, VIH = +2.0V, VIL = +0.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at V+ = +3V and TA = +25°C.
PAGE 5
MAX4638/MAX4639 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers ELECTRICAL CHARACTERISTICS—+3.0V Single Supply (continued) (V+ = +2.7V to +3.3V, V- = 0, VIH = +2.0V, VIL = +0.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at V+ = +3V and TA = +25°C.
PAGE 6
MAX4638/MAX4639 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers ELECTRICAL CHARACTERISTICS—±2.5V Dual Supplies (continued) (V+ = +2.5 ±10%, V- = -2.5V ±10%, VIH = +2.0V, VIL = +0.4V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at V± = ±2.5V and TA = +25°C.) (Notes 2, 3) PARAMETER SYMBOL CONDITIONS On-Resistance Flatness (Note 6) I = 10mA; VNO_ = ±1.5V, TA = +25°C RFLAT(ON) COM_ 0; V+ = +2.25V; V- = -2.25V TA = TMIN to TMAX NO_ Off-Leakage Current (Note 7) V+ = +2.
PAGE 7
MAX4638/MAX4639 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers Typical Operating Characteristics (V+ = +5V, V- = 0V, TA = +25°C, unless otherwise noted.) 20 V+ = +5V 3.5 6 TA = +85°C V+ = +3V 5 TA = +85°C 10 4 2.5 2.0 TA = -40°C RON (Ω) R0N (Ω) TA = +25°C 1.5 V+ = +3V 1 0.5 0 0 0 SUPPLY CURRENT vs. SUPPLY VOLTAGE MAX4638 toc04 V+ = +5V CHARGE (pC) 14 140 120 12 10 8 6 100 3.0 1 0.1 0.01 2 60 0 0.001 -2.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 -0.5 1.
PAGE 8
MAX4638/MAX4639 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers Typical Operating Characteristics (continued) (V+ = +5V, V- = 0V, TA = +25°C, unless otherwise noted.) OFF-ISOLATION -60 CROSSTALK 10 -120 1 OFF-LEAKAGE 0.06 0.04 0.1 0.02 0 0.001 0.01 0.1 1 10 100 MAX4638 toc12 ON-LEAKAGE 0.01 -100 V+ = +2.5V V- = -2.5V 5Vp-p SIGNAL 600Ω IN AND OUT 0.08 THD (%) -40 -80 100 LEAKAGE CURRENT (pA) RESPONSE (dB) ON-RESPONSE MAX4639 0.
PAGE 9
MAX4638/MAX4639 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers Detailed Description The MAX4638/MAX4639 are low-voltage, CMOS analog muxes. The MAX4638 is an 8:1 mux that switches one of eight inputs (NO1–NO8) to a common output (COM) as determined by the 3-bit binary inputs A0, A1, and A2. The MAX4639 is a 4:1 dual mux that switches one of four differential inputs to a common differential output as determined by the 2-bit binary inputs A0 and A1.
PAGE 10
MAX4638/MAX4639 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers Test Circuits/Timing Diagrams V+ V+ NO1 A2 A1 A0 50Ω MAX4638 VIH VNO1 NO2–NO7 NO8 VNO8 EN COM GND VIN V- VOUT 100Ω 35pF ADDRESS INPUT VIN V- V+ A1 0V tTRANS NO1B 10% 90% SWITCH OUTPUT VOUT VNO1 NO1A–NO4A A0 50% VN01 V+ tR < 5ns tF < 5ns +3V VN08 50Ω MAX4639 VIH EN COMB V100Ω GND VIN tTRANS VNO8 NO4B VOUT 35pF V- Figure 2.
PAGE 11
MAX4638/MAX4639 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers Test Circuits/Timing Diagrams (continued) V+ VEN V+ EN NO1 VNO1 NO2–NO8 A0 A1 MAX4638 A2 COM GND 50Ω LOGIC INPUT VEN VOUT V- 35pF 100Ω VVEN SWITCH OUTPUT VOUT V+ EN NO1B A0 50% 0V VNO1 V+ VNO1 tR < 5ns tF < 5ns +3V 90% 90% 0V NO_, COMA tON(EN) MAX4639 A1 COMB V- GND 50Ω tOFF(EN) VOUT 35pF 100Ω V- Figure 4.
PAGE 12
MAX4638/MAX4639 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers Test Circuits/Timing Diagrams (continued) V+ VIN RS = 50Ω NO1 V+ 1μF NO8 A0 R 50Ω MAX4638 MAX4639 COM A1 A2 GND EN V+ NO1 V+ V- RL 50Ω NO2 VIN NO8 A0 VOUT RG = 50Ω A1 CL 5pF A2 VOUT MAX4638 COM MAX4639 GND EN V- RL 50Ω 1μF V- VVEN 1μF OFF-ISOLATION = 20log VOUT VEN VIN CROSSTALK = 20log CL 5pF VOUT VIN Figure 7. Crosstalk Figure 6.
PAGE 13
MAX4638/MAX4639 3.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers 2 11 NO2 3 NO3 4 8 NO7 EN A0 A1 GND 14 13 V+ NO1A 2 11 NO1B 10 NO5 NO2A 3 10 NO2B 9 NO6 NO3A 4 9 NO3B TQFN MAX4639 EP* TQFN N.C. A1 N.C. 18 17 16 N.C. 16 A0 A2 17 19 A1 18 N.C. A0 19 + 20 N.C.
PAGE 14
MAX4638/MAX4639 3.5Ω, Single 8:1 and Dual 4:1,Z Low-Voltage Analog Multiplexers Revision History REVISION NUMBER REVISION DATE 2 9/10 — 3 10/12 Added RoHS ordering information throughout data sheet DESCRIPTION PAGES CHANGED — 1–16 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.