Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsInterface ICsInterface IC - analogue switches SOT 23 8

19-1906; Rev 0; 2/01

N.C.V+

V-NC

GND

COM

SOT23-8

TOP VIEW

MAX4649

LOGIC

OFF

General Description

The MAX4649 is a dual-supply, single-pole/double-

throw (SPDT) analog switch. On-resistance is 45Ω max

and flat (7Ω max) over the specified signal range. The

MAX4649 can handle Rail-to-Rail

analog signals, and

conducts analog or digital signals equally well in either

direction. This switch operates from a single +9V to

+36V supply, or from ±4.5V to ±20V dual supplies. The

primary application areas are in the switching and rout-

ing of signals in telecommunications and test equip-

ment.

The MAX4649 features a switch transition time of 130ns

max at +25°C, and a guaranteed break-before-make

switching time of 5ns. Off-leakage current is only 2nA

max at +25°C.

The MAX4649 is available in a tiny 8-pin SOT23 pack-

age.

Applications

PBX, PABX Systems

Communication Systems

DSL

Test Equipment

Avionics

Audio Systems

Redundant Systems

Relay Replacement

PC Multimedia Boards

Features

♦ Low On-Resistance 45Ω max ±15V Supplies

♦ 5Ω max R

Match Between Channels

♦ Guaranteed R

Flatness Over Specified Signal

Range (7Ω max)

♦ V

Logic Supply Not Required

♦ Rail-to-Rail Signal Handling

♦ +9V to +36V Single Supply Operation

♦ ±4.5V to ±20V Dual Supply Operation

♦ Low Crosstalk: -92dB at 1MHz

♦ High Off-Isolation: -92dB at 1MHz

♦ TTL/CMOS-Compatible Control Inputs

45Ω, SPDT Analog Switch in SOT23-8

MAX4649

________________________________________________________________ Maxim Integrated Products 1

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Pin Configuration

Ordering Information

PART

TEMP.

RANGE

PIN-

PA CK A G E

TOP

M ARK

MAX4649E KA- T- 40°C to + 85°C 8-SOT23 AAIE

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

Summary of content (10 pages)

PAGE 1
9-1906; Rev 0; 2/01 45Ω, SPDT Analog Switch in SOT23-8 Features ♦ Low On-Resistance 45Ω max ±15V Supplies ♦ 5Ω max RON Match Between Channels ♦ Guaranteed RON Flatness Over Specified Signal Range (7Ω max) ♦ VL Logic Supply Not Required ♦ Rail-to-Rail Signal Handling ♦ +9V to +36V Single Supply Operation ♦ ±4.
PAGE 2
MAX4649 45Ω, SPDT Analog Switch in SOT23-8 ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND.) V+ ........................................................................-0.3V to +44.0V V- .........................................................................-44.0V to +0.3V V+ to V-................................................................-0.3V to +44.0V All Other Pins (Note 1) ..........................(V- - 0.3V) to (V+ + 0.3V) Continuous Current into any Terminal ............................
PAGE 3
45Ω, SPDT Analog Switch in SOT23-8 (V+ = +15V, V- = -15V, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 4
MAX4649 45Ω, SPDT Analog Switch in SOT23-8 ELECTRICAL CHARACTERISTICS—Single +12V Supply (V+ = +12V, V- = 0, VIH = 2.4V, VIL = 0.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 5
45Ω, SPDT Analog Switch in SOT23-8 ON-RESISTANCE vs. VCOM (SINGLE SUPPLY) 45 A 60 B 50 C 70 60 V+ = +18V 50 D 40 40 V+ = +12V E RON (Ω) RON (Ω) 80 35 V+ = +30V 30 15 V+ = +36V 20 20 -10 0 10 10 20 30 40 -15 -10 -5 0 5 10 VCOM (V) VCOM (V) VCOM (V) ON-RESISTANCE vs. VCOM AND TEMPERATURE ON-LEAKAGE CURRENT vs. TEMPERATURE OFF-LEAKAGE CURRENT vs.
PAGE 6
Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.) CHARGE INJECTION vs. VCOM 100 10 A: V+ = +15V, V- = -15V B: V+ = +12V, V- = 0 30 CHARGE (pC) V+ = +15V V- = -15V 0.1 0.01 0.001 10 B A 0 -10 0.0001 -20 0.00001 -30 0.000001 -40 4.5 4.0 LOGIC THRESHOLD (V) 20 1 5.0 MAX4649 toc11 40 MAX4649 toc10 1000 LOGIC THRESHOLD vs. SUPPLY VOLTAGE MAX4649 toc12 SUPPLY CURRENT vs. LOGIC VOLTAGE I+ (µA) MAX4649 45Ω, SPDT Analog Switch in SOT23-8 3.5 3.0 2.5 2.
PAGE 7
45Ω, SPDT Analog Switch in SOT23-8 Off-Isolation at High Frequencies In 50Ω systems, the high-frequency on-response of these parts extends from DC to above 300MHz, with a typical loss of -3.6dB. When the switch is turned off, Test Circuits/Timing Diagrams V+ D1 V+ NO_ COM Vg VD2 V- Figure 1. Overvoltage Protection MAX4649 +V LOGIC INPUT t R < 20ns t F < 20ns +3V 50% VNC 0 VNO t TRANS SWITCH OUTPUT t TRANS VNO VO 0.9V NO 0.
PAGE 8
45Ω, SPDT Analog Switch in SOT23-8 MAX4649 Test Circuits/Timing Diagrams (continued) V+ MAX4649 LOGIC INPUT V+ NC +3V +3V VOUT COM 50% 0 NO RL 300Ω IN LOGIC INPUT CL 35pF SWITCH OUTPUT (VOUT) GND 0.9 ✕ VOUT tD CL INCLUDES FIXTURE AND STRAY CAPACITANCE. Figure 3. MAX4649 Break-Before-Make Test Circuit V+ ∆VO MAX4649 V+ COM VO V GEN GND NC OR NO V- IN OFF ON OFF Q = (∆V O )(C L ) VVIN = +3V IN DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
PAGE 9
45Ω, SPDT Analog Switch in SOT23-8 MAX4649 V+ C V+ C SIGNAL GENERATOR MAX4649 V+ COM COM VIN IN ANALYZER IN V IN CAPACITANCE METER NC OR NO NC OR NO GND V- C RL f = 1MHz GND V- V- Figure 5. Off-Isolation Figure 7. Channel-Off Capacitance V+ C SIGNAL GENERATOR V+ C MAX4649 50Ω NC COM VIN C V- MAX4649 V+ COM CAPACITANCE METER IN IN V IN f = 1MHz NO ANALYZER NC OR NO GND V- RL C GND V- Figure 6. Crosstalk Between Switches V- C V- Figure 8.
PAGE 10
45Ω, SPDT Analog Switch in SOT23-8 SOT23, 8L.EPS MAX4649 Package Information 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.