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SN74CB3T3257PW データシート(PDF) 1 Page - Texas Instruments |
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SN74CB3T3257PW データシート(HTML) 1 Page - Texas Instruments |
1 / 16 page www.ti.com FEATURES DGV OR PW PACKAGE (TOP VIEW) 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 S 1B1 1B2 1A 2B1 2B2 2A GND VCC OE 4B1 4B2 4A 3B1 3B2 3A 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 (ICC = 20 µA Max) • Output Voltage Translation Tracks VCC • VCC 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 VCC 5-V/3.3-V CMOS Outputs – 5-V/3.3-V Input Down to 2.5-V Output Level • Ioff Supports Partial-Power-Down Mode Shift With 2.5-V VCC 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 (ron) Characteristics (A114-B, Class II) (ron = 5 Ω Typ) – 1000-V Charged-Device Model (C101) • Low Input/Output Capacitance Minimizes • Supports Digital Applications: Level Loading (Cio(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 (ron), 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 VCC. 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 TA 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. Copyright © 2003–2005, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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