Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsInterface ICsInterface IC - analogue switches TQFN 24

General Description

The MAX4947/MAX4948 analog switches operate from a

single +1.8V to +5.5V supply. These switches feature a

low 30pF (typ) capacitance for high-speed data switch-

ing applications.

The MAX4947 is a triple double-pole/double-throw (DPDT)

switch, and the MAX4748 is a hex single-pole/double-

throw (SPDT) switch with one control logic input. The

MAX4947 has three logic inputs to control the switches in

pairs. The MAX4948 has one logic input and an enable

input (EN) to disable the switches.

The MAX4947/MAX4948 are available in small 24-pin

(4mm x 4mm) TQFN and 25-bump (2.5mm x 2.5mm)

chip-scale packages (UCSP™).

Applications

Features

♦ Multiplex SDIO or Memory Stick Interfaces

♦ 1.8V to 5.5V Supply Voltage Range

♦ Low On-Resistance 4Ω (typ)

♦ Low-Capacitance Switches, 30pF (typ)

♦ Rail-to-Rail Signal Handling

♦ Small 25-Bump UCSP™ (2.5mm x 2.5mm) and

24-TQFN (4mm x 4mm)

MAX4947/MAX4948

Hex SPDT Data Switch

________________________________________________________________

Maxim Integrated Products

Ordering Information

MAX4947

COM6

COM5

COM4

COM3

COM2

COM1

GND

NO1

NC1

NO2

NC2

NO3

NC3

NO4

NC4

NO5

NC5

NO6

NC6

CB12

CB34

CB56

MAX4948

COM6

COM5

COM4

COM3

COM2

COM1

GND

NO1

NC1

NO2

NC2

NO3

NC3

NO4

NC4

NO5

NC5

NO6

NC6

Functional Diagram

19-0673; Rev 1; 1/07

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.

Future product—contact factory for availability.

Denotes lead-free package.

EP = Exposed paddle.

EVALUATION KIT

AVAILABLE

PART

TEMP

RANGE

PIN-

PACKAGE

PKG

CODE

MAX4947EBA+* -40°C to +85°C 25 UCSP-25 B25-1

MAX4947ETG+ -40°C to +85°C 24 TQFN-EP T2444-4

MAX4948EBA+* -40°C to +85°C 25 UCSP-25 B25-1

MAX4948ETG+ -40°C to +85°C 24 TQFN-EP T2444-4

USB Signal Switching

UART Signal Switching

SDIO/Memory Stick

Cell Phones

PDAs

Typical Operating Circuit appears at end of data sheet.

UCSP is a trademark of Maxim Integrated Products, Inc.

Summary of content (13 pages)

PAGE 1
9-0673; Rev 1; 1/07 KIT ATION EVALU E L B AVAILA Hex SPDT Data Switch The MAX4947/MAX4948 analog switches operate from a single +1.8V to +5.5V supply. These switches feature a low 30pF (typ) capacitance for high-speed data switching applications. The MAX4947 is a triple double-pole/double-throw (DPDT) switch, and the MAX4748 is a hex single-pole/doublethrow (SPDT) switch with one control logic input. The MAX4947 has three logic inputs to control the switches in pairs.
PAGE 2
MAX4947/MAX4948 Hex SPDT Data Switch ABSOLUTE MAXIMUM RATINGS VCC to GND ...........................................................-0.3V to +6.0V All other pins to GND (Note 1) ......................-0.3V to VCC + 0.3V Continuous Current NO_, NC_, COM_ .......................................................±100mA Peak Current NO_, NC_, COM_ (pulsed at 1ms, 50% Duty Cycle)................................±200mA (pulsed at 1ms, 10% Duty Cycle)................................
PAGE 3
Hex SPDT Data Switch (VCC = +2.7V to +5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +3V, TA = +25°C.) (Notes 2, 3) PARAMETER COM_ Off-Leakage Current SYMBOL ICOM_(OFF) CONDITIONS VCC = 3.6V (MAX4948); VCOM_ = 3.3V, 0.3V; VNO_ or VNC_ = 0, 3V, 3.3V TA MIN +25°C -6 TYP MAX +6 TMIN to TMAX -10 +10 UNITS nA DYNAMIC tON VCC = 2.7V; VNO_ or VNC_= 1.5V; RL = 50Ω; CL = 35pF, Figure 1 +25°C Turn-On Time tOFF VCC = 2.7V; VNO_ or VNC_= 1.
PAGE 4
ELECTRICAL CHARACTERISTICS (continued) (VCC = +2.7V to +5.5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +3V, TA = +25°C.) (Notes 2, 3) Note 2: The algebraic convention is used. The most negative value is shown in the minimum column. Note 3: UCSP parts are 100% tested at TA = +25°C. Limits across the full temperature range are guaranteed by correlation and design. TQFN parts are guaranteed by correlation and design at - 40°C.
PAGE 5
Hex SPDT Data Switch V+ = 5V V+ = 3V 10 5 0 0 1 2 3 VCOM (V) 4 5 5 -40 800 2.5 3.5 4.5 SUPPLY VOLTAGE (V) 600 500 tOFF 400 350 200 100 100 50 2.5 3.5 4.5 SUPPLY VOLTAGE (V) 5.5 -40 -60 10 35 TEMPERATURE (°C) 60 85 SUPPLY CURRENT vs. LOGIC VOLTAGE VCC = 5.5V 6 SUPPLY CURRENT (μA) RL = 600Ω -15 7 MAX4947/48 toc14 1 THD+N (%) -40 tON, V+ = 5V tOFF, V+ = 5V 0 1.5 MAX4947/48 toc13 -20 -80 250 TOTAL HARMONIC DISTORTION PLUS NOISE vs.
PAGE 6
Hex SPDT Data Switch MAX4947/MAX4948 Pin Description PIN NAME MAX4947 6 FUNCTION MAX4948 TQFN UCSP TQFN UCSP 1 D2 1 D2 2 D1 2 3 C1 3 4 C2 4 5 B1 6, 21 A1, C3, D3 7 8 NC6 Analog Switch 6. Normally Closed Terminal 6. D1 NO5 Analog Switch 5. Normally Open Terminal 5. C1 COM5 C2 NC5 Analog Switch 5. Normally Closed Terminal 5. — — CB56 Digital Control Input for Analog Switches 5 and 6 6, 21 A1, C3, D3 GND Ground B2 7 B2 COM4 A2 8 A2 NO4 Analog Switch 4.
PAGE 7
Hex SPDT Data Switch NO4 NO3 COM3 CB34 A NC3 COM5 NC5 NC2 GND COM2 15 14 13 12 NC3 COM1 20 11 COM3 10 NO3 9 NC4 8 NO4 7 COM4 CB12 B 16 GND 21 C MAX4947 VCC 22 NC1 GND NO2 COM6 23 D NO6 COM6 *EP NO6 24 COM1 VCC + NO1 1 2 NC6 E UCSP 2.5mm x 2.
PAGE 8
MAX4947/MAX4948 Hex SPDT Data Switch Detailed Description The MAX4947 triple DPDT and the MAX4948 hex SPDT analog switches operate from a single +1.8V to +5.5V supply. These devices are fully specified for +3V applications. The MAX4947/MAX4948 have a guaranteed 4Ω (typ) onresistance and a low 30pF (typ) capacitance that makes the switch ideal for data switching applications.
PAGE 9
Hex SPDT Data Switch VCC MAX4947/ MAX4948 LOGIC INPUT VCC VOUT COM_ NO_ RL CB_ LOGIC INPUT 50% 0V NC_ VN_ VCC CL GND 0.9 x VOUT VOUT tBBM CL INCLUDES FIXTURE AND STRAY CAPACITANCE. Figure 2.
PAGE 10
MAX4947/MAX4948 Hex SPDT Data Switch Timing Circuits/Timing Diagrams (continued) V CC MAX4947/ MAX4948 ΔVOUT V CC RGEN VOUT COM_ NC_ OR NO_ VOUT CB_ OFF CL V GEN GND OFF ON CB_ VIL TO VIH OFF CB_ ON OFF Q = (ΔV OUT )(C L ) LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE. Figure 4. Charge Injection +5V 10nF V OFF-ISOLATION = 20log ✕ OUT VCB_.
PAGE 11
Hex SPDT Data Switch VCC CB CLK NO1 NC1 CMD DAT1 SD HOST COM4 S4 NO5 NC5 DAT3 COM3 S3 NO4 NC4 DAT2 COM2 S2 NO3 NC3 SD I/O 1 COM1 S1 NO2 NC2 DAT0 EN LOGIC COM5 S5 NO6 NC6 COM6 S6 CLK MAX4948 CMD GND DAT0 SD I/O 2 DAT1 DAT2 DAT3 Chip Information PROCESS: CMOS ______________________________________________________________________________________ 11 MAX4947/MAX4948 Typical Operating Circuit
PAGE 12
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.) 25L, UCSP.
PAGE 13
Hex SPDT Data Switch 24L QFN THIN.EPS Revision History Pages changed at Rev 1: 1. 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.