Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLogic ICsLogic IC - Multiplexer, demux FET multiplexer/demultiplexer Single supply TSSOP 16

www.ti.com

FEATURES

DGV OR PW PACKAGE

(TOP VIEW)

1B1

1B2

2B1

2B2

GND

4B1

4B2

3B1

3B2

DESCRIPTION/ORDERING INFORMATION

SN74CB3T3257

4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER

2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V-TOLERANT LEVEL SHIFTER

SCDS149 – OCTOBER 2003 – REVISED MARCH 2005

• Low Power Consumption (I

= 20 µ A Max)

• Output Voltage Translation Tracks V

• V

Operating Range From 2.3 V to 3.6 V

• Supports Mixed-Mode Signal Operation on All • Data I/Os Support 0- to 5-V Signaling Levels

Data I/O Ports (0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, 5 V)

– 5-V Input Down to 3.3-V Output Level Shift • Control Inputs Can Be Driven by TTL or

With 3.3-V V

5-V/3.3-V CMOS Outputs

– 5-V/3.3-V Input Down to 2.5-V Output Level • I

off

Supports Partial-Power-Down Mode

Shift With 2.5-V V

Operation

• 5-V-Tolerant I/Os With Device Powered Up or • Latch-Up Performance Exceeds 250 mA Per

Powered Down JESD 17

• Bidirectional Data Flow With Near-Zero • ESD Performance Tested Per JESD 22

Propagation Delay

– 2000-V Human-Body Model

• Low ON-State Resistance (r

) Characteristics (A114-B, Class II)

= 5 Ω Typ)

– 1000-V Charged-Device Model (C101)

• Low Input/Output Capacitance Minimizes

• Supports Digital Applications: Level

Loading (C

io(OFF)

= 5 pF Typ)

Translation, USB Interface, Memory

• Data and Control Inputs Provide Undershoot Interleaving, Bus Isolation

Clamp Diodes

• Ideal for Low-Power Portable Equipment

The SN74CB3T3257 is a high-speed TTL-compatible FET multiplexer/demultiplexer with low ON-state resistance

), allowing for minimal propagation delay. The device fully supports mixed-mode signal operation on all data

I/O ports by providing voltage translation that tracks V

. The SN74CB3T3257 supports systems using 5-V TTL,

3.3-V LVTTL, and 2.5-V CMOS switching standards, as well as user-defined switching levels (see Figure 1 ).

ORDERING INFORMATION

PACKAGE

(1)

ORDERABLE PART NUMBER TOP-SIDE MARKING

Tube SN74CB3T3257PW

TSSOP – PW KS257

–40 ° C to 85 ° C Tape and reel SN74CB3T3257PWR

TVSOP – DGV Tape and reel SN74CB3T3257DGVR KS257

(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at

www.ti.com/sc/package.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (15 pages)

PAGE 1
www.ti.com SN74CB3T3257 4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER 2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V-TOLERANT LEVEL SHIFTER SCDS149 – OCTOBER 2003 – REVISED MARCH 2005 • • • FEATURES • • • • • • • Output Voltage Translation Tracks VCC Supports Mixed-Mode Signal Operation on All Data I/O Ports – 5-V Input Down to 3.3-V Output Level Shift With 3.3-V VCC – 5-V/3.3-V Input Down to 2.5-V Output Level Shift With 2.
PAGE 2
SN74CB3T3257 4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER 2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V-TOLERANT LEVEL SHIFTER www.ti.com SCDS149 – OCTOBER 2003 – REVISED MARCH 2005 DESCRIPTION/ORDERING INFORMATION (CONTINUED) The SN74CB3T3257 is a 4-bit 1-of-2 multiplexer/demultiplexer with a single output-enable (OE) input. The select (S) input controls the data path of the multiplexer/demultiplexer.
PAGE 3
www.ti.com SN74CB3T3257 4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER 2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V-TOLERANT LEVEL SHIFTER SCDS149 – OCTOBER 2003 – REVISED MARCH 2005 LOGIC DIAGRAM (POSITIVE LOGIC) 4 1A 2 1B1 SW 3 1B2 SW 7 2A 5 2B1 SW 6 2B2 SW 3A 9 11 SW 3B1 10 SW 12 4A 3B2 14 4B1 SW 13 SW 4B2 1 S 15 OE SIMPLIFIED SCHEMATIC, EACH FET SWITCH (SW) A B VG(1) Control Circuit EN(2) (1) Gate voltage (VG) is equal to approximately VCC + VT when the switch is ON and VI > VCC + VT.
PAGE 4
SN74CB3T3257 4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER 2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V-TOLERANT LEVEL SHIFTER www.ti.com SCDS149 – OCTOBER 2003 – REVISED MARCH 2005 Absolute Maximum Ratings (1) over operating free-air temperature range (unless otherwise noted) MIN MAX VCC Supply voltage range –0.5 7 V VIN Control input voltage range (2) (3) –0.
PAGE 5
www.ti.com SN74CB3T3257 4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER 2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V-TOLERANT LEVEL SHIFTER SCDS149 – OCTOBER 2003 – REVISED MARCH 2005 Electrical Characteristics (1) over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VIK VCC = 3 V, II = –18 mA VOH See Figures 3 and 4 IIN Control inputs MIN VCC = 3.6 V, VIN = 3.6 V to 5.5 V or GND Ioff VCC = 0, VO = 0 to 5.5 V, VI = 0 ICC VCC = 3.
PAGE 6
SN74CB3T3257 4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER 2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V-TOLERANT LEVEL SHIFTER www.ti.com SCDS149 – OCTOBER 2003 – REVISED MARCH 2005 PARAMETER MEASUREMENT INFORMATION VCC Input Generator VIN 50 Ω 50 Ω VG1 TEST CIRCUIT DUT 2 × VCC Input Generator S1 RL VO VI 50 Ω 50 Ω VG2 CL (see Note A) RL TEST VCC S1 RL VI CL tpd(s) 2.5 V ± 0.2 V 3.3 V ± 0.3 V Open Open 500 Ω 500 Ω 3.6 V or GND 5.5 V or GND 30 pF 50 pF tPLZ/tPZL 2.5 V ± 0.2 V 3.
PAGE 7
SN74CB3T3257 4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER 2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V-TOLERANT LEVEL SHIFTER www.ti.com SCDS149 – OCTOBER 2003 – REVISED MARCH 2005 TYPICAL CHARACTERISTICS OUTPUT VOLTAGE vs INPUT VOLTAGE OUTPUT VOLTAGE vs INPUT VOLTAGE 3.0 4.0 VCC = 2.3 V IO = 1 µA TA = 25°C V - Output Voltage - V O V - Output Voltage - V O 4.0 2.0 1.0 0.0 0.0 1.0 2.0 3.0 4.0 VI - Input Voltage - V 5.0 6.0 3.0 VCC = 3 V IO = 1 µA TA = 25°C 2.0 1.0 0.0 0.0 1.0 2.0 3.
PAGE 8
SN74CB3T3257 4-BIT 1-OF-2 FET MULTIPLEXER/DEMULTIPLEXER 2.5-V/3.3-V LOW-VOLTAGE BUS SWITCH WITH 5-V-TOLERANT LEVEL SHIFTER SCDS149 – OCTOBER 2003 – REVISED MARCH 2005 www.ti.com TYPICAL CHARACTERISTICS OUTPUT VOLTAGE HIGH vs SUPPLY VOLTAGE 3.5 4.0 VCC = 2.3 V to 3.6 V VI = 5.5 V TA = 85°C 100 µA 8 mA 16 mA 24 mA 3.0 2.5 2.0 3.5 VCC = 2.3 V to 3.6 V VI = 5.5 V TA = 25°C 8 mA 16 mA 24 mA 3.0 2.5 2.0 2.5 2.7 2.9 3.1 3.3 VCC - Supply Voltage - V 3.5 3.7 2.3 2.5 2.7 2.9 3.1 3.
PAGE 9
PACKAGE OPTION ADDENDUM www.ti.
PAGE 10
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant SN74CB3T3257DGVR TVSOP DGV 16 2000 330.0 12.4 6.8 4.0 1.6 8.0 12.0 Q1 SN74CB3T3257PWR TSSOP PW 16 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.
PAGE 11
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74CB3T3257DGVR TVSOP DGV 16 2000 367.0 367.0 35.0 SN74CB3T3257PWR TSSOP PW 16 2000 367.0 367.0 35.
PAGE 12
MECHANICAL DATA MPDS006C – FEBRUARY 1996 – REVISED AUGUST 2000 DGV (R-PDSO-G**) PLASTIC SMALL-OUTLINE 24 PINS SHOWN 0,40 0,23 0,13 24 13 0,07 M 0,16 NOM 4,50 4,30 6,60 6,20 Gage Plane 0,25 0°– 8° 1 0,75 0,50 12 A Seating Plane 0,15 0,05 1,20 MAX PINS ** 0,08 14 16 20 24 38 48 56 A MAX 3,70 3,70 5,10 5,10 7,90 9,80 11,40 A MIN 3,50 3,50 4,90 4,90 7,70 9,60 11,20 DIM 4073251/E 08/00 NOTES: A. B. C. D. All linear dimensions are in millimeters.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46C and to discontinue any product or service per JESD48B. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.