SN74CB3T3257DGVR

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 2.5-V VCC 5-V-Tolerant I/Os With Device Powered Up or Powered Down Bidirectional Data Flow With Near-Zero Propagation Delay Low ON-State Resistance (ron) Characteristics (ron = 5 Ω Typ) Low Input/Output Capacitance Minimizes Loading (Cio(OFF) = 5 pF Typ) Data and Control Inputs Provide Undershoot Clamp Diodes • • • • • • Low Power Consumption (ICC = 20 µA Max) VCC Operating Range From 2.3 V to 3.6 V Data I/Os Support 0- to 5-V Signaling Levels (0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, 5 V) Control Inputs Can Be Driven by TTL or 5-V/3.3-V CMOS Outputs Ioff Supports Partial-Power-Down Mode Operation Latch-Up Performance Exceeds 250 mA Per JESD 17 ESD Performance Tested Per JESD 22 – 2000-V Human-Body Model (A114-B, Class II) – 1000-V Charged-Device Model (C101) Supports Digital Applications: Level Translation, USB Interface, Memory Interleaving, Bus Isolation Ideal for Low-Power Portable Equipment DGV OR PW PACKAGE (TOP VIEW) S 1B1 1B2 1A 2B1 2B2 2A GND 1 16 2 15 3 14 4 13 5 12 6 7 11 10 8 9 VCC OE 4B1 4B2 4A 3B1 3B2 3A DESCRIPTION/ORDERING INFORMATION 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 PACKAGE (1) TA –40°C to 85°C TSSOP – PW TVSOP – DGV (1) ORDERABLE PART NUMBER Tube SN74CB3T3257PW Tape and reel SN74CB3T3257PWR Tape and reel SN74CB3T3257DGVR TOP-SIDE MARKING KS257 KS257 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. Copyright © 2003–2005, Texas Instruments Incorporated 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. When OE is low, the multiplexer/demultiplexer is enabled, and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE is high, the multiplexer/demultiplexer is disabled, and a high-impedance state exists between the A and B ports. This device is fully specified for partial-power-down applications using Ioff. The Ioff feature ensures that damaging current will not backflow through the device when it is powered down. The device has isolation during power off. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. FUNCTION TABLE (EACH MULTIPLEXER/DEMULTIPLEXER) INPUTS S INPUT/OUTPUT A FUNCTION L L B1 A port = B1 port L H B2 A port = B2 port H X Z Disconnect OE VCC 5.5 V VCC IN ≈VCC – 1 V ≈VCC OUT ≈VCC – 1 V CB3T 0V 0V Input Voltages Output Voltages NOTE A: If the input high voltage (VIH) level is greater than or equal to VCC – 1 V, and less than or equal to 5.5 V, then the output high voltage (VOH) level will be equal to approximately the VCC voltage level. Figure 1. Typical DC Voltage Translation Characteristics 2 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. (2) EN is the internal enable signal applied to the switch. 3 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) –0.5 7 V VI/O Switch I/O voltage range (2) (3) (4) IIK Control input clamp current VIN < 0 –50 mA II/OK I/O port clamp current VI/O < 0 –50 mA ±128 mA ±100 mA IIO ON-state switch –0.5 7 current (5) Continuous current through VCC or GND θJA Package thermal impedance (6) Tstg Storage temperature range (1) (2) (3) (4) (5) (6) UNIT DGV package 120 PW package 108 –65 V °C/W °C 150 Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltages are with respect to ground, unless otherwise specified. The input and output voltage ratings may be exceeded if the input and output clamp-current ratings are observed. VI and VO are used to denote specific conditions for VI/O. II and IO are used to denote specific conditions for II/O. The package thermal impedance is calculated in accordance with JESD 51-7. Recommended Operating Conditions (1) VCC Supply voltage VIH High-level control input voltage VIL Low-level control input voltage VI/O Data input/output voltage TA Operating free-air temperature (1) 4 MIN MAX UNIT 2.3 3.6 VCC = 2.3 V to 2.7 V 1.7 5.5 V VCC = 2.7 V to 3.6 V 2 5.5 VCC = 2.3 V to 2.7 V 0 0.7 VCC = 2.7 V to 3.6 V 0 0.8 0 5.5 V –40 85 °C V V All unused control inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004. 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 = 3.6 V, II/O = 0, Switch ON or OFF, VIN = VCC or GND 20 VCC = 3 V to 3.6 V, One input at VCC – 0.6 V, Other inputs at VCC or GND VCC = 3.3 V, VIN = VCC or GND ron (5) (1) (2) (3) (4) (5) µA 20 Control inputs B port µA 10 VI = 5.5 V Control inputs Cio(ON) ±10 VI = VCC or GND Cin 300 3 µA pF 5 VI/O = 5.5 V or 3.3 V µA pF 7 VCC = 3.3 V, VI/O = 5.5 V, 3.3 V, or GND, Switch OFF, VIN = VCC or GND VCC = 3.3 V, Switch ON, VIN = VCC or GND µA ±5 VI = 0 to 0.7 V ∆ICC (4) A port µA –40 VCC = 3.6 V, VO = 0 to 5.5 V, VI = 0, Switch OFF, VIN = VCC or GND B port ±10 VI = 0.7 V to VCC – 0.7 V IOZ (3) A port V ±20 VCC = 3.6 V, Switch ON, VIN = VCC or GND UNIT –1.2 VI = VCC – 0.7 V to 5.5 V II Cio(OFF) TYP (2) MAX 6 VI/O = GND 16 VI/O = 5.5 V or 3.3 V pF 4 VI/O = GND 16 VCC = 2.3 V, TYP at VCC = 2.5 V, VI = 0 IO = 24 mA 5 8 IO = 16 mA 5 8 VCC = 3 V, VI = 0 IO = 64 mA 5 7 IO = 32 mA 5 7 Ω VIN and IIN refer to control inputs. VI, VO, II, and IO refer to data pins. All typical values are at VCC = 3.3 V (unless otherwise noted), TA = 25°C. For I/O ports, the parameter IOZ includes the input leakage current. This is the increase in supply current for each input that is at the specified TTL voltage level, rather than VCC or GND. Measured by the voltage drop between A and B terminals at the indicated current through the switch. ON-state resistance is determined by the lower of the voltages of the two (A or B) terminals. Switching Characteristics over recommended operating free-air temperature range (unless otherwise noted) (see Figure 2) VCC = 3.3 V ± 0.3 V TO (OUTPUT) tpd (1) A or B B or A 0.25 ns tpd(s) S A 1 9.5 1 7 ns S B 1 9 1 7.5 OE A or B 1 9 1 7.5 S B 1 7 1 7.5 OE A or B 1 6 1 8 ten tdis (1) VCC = 2.5 V ± 0.2 V FROM (INPUT) PARAMETER MIN MAX MIN 0.15 UNIT MAX ns ns The propagation delay is the calculated RC time constant of the typical ON-state resistance of the switch and the specified load capacitance, when driven by an ideal voltage source (zero output impedance). 5 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 3.3 V ± 0.3 V 2 × VCC 2 × VCC 500 Ω 500 Ω GND GND 30 pF 50 pF 0.15 V 0.3 V tPHZ/tPZH 2.5 V ± 0.2 V 3.3 V ± 0.3 V Open Open 500 Ω 500 Ω 3.6 V 5.5 V 30 pF 50 pF 0.15 V 0.3 V V∆ VCC Output Control (VIN) VCC/2 VCC VCC/2 VCC/2 0V tPLH VOH Output VCC/2 VCC/2 VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES (tpd(s)) Output Waveform 1 S1 at 2 × VCC (see Note B) tPLZ VCC VCC/2 VOL + V∆ VOL tPZH tPHL VCC/2 0V tPZL Output Control (VIN) Open GND Output Waveform 2 S1 at Open (see Note B) tPHZ VOH VCC/2 VOH − V∆ 0V VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES NOTES: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control. C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns. D. The outputs are measured one at a time, with one transition per measurement. E. tPLZ and tPHZ are the same as tdis. F. tPZL and tPZH are the same as ten. G. tPLH and tPHL are the same as tpd(s). The tpd propagation delay is the calculated RC time constant of the typical ON-state resistance of the switch and the specified load capacitance, when driven by an ideal voltage source (zero output impedance). H. All parameters and waveforms are not applicable to all devices. Figure 2. Test Circuit and Voltage Waveforms 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 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 3.0 4.0 5.0 6.0 VI - Input Voltage - V Figure 3. Data Output Voltage vs Data Input Voltage 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 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 3.3 VCC - Supply Voltage - V OUTPUT VOLTAGE HIGH vs SUPPLY VOLTAGE V - Output Voltage High - V OH 4.0 3.5 VCC = 2.3 V to 3.6 V VI = 5.5 V TA = -40°C 100 µA 8 mA 16 mA 24 mA 3.0 2.5 2.0 1.5 2.3 2.5 3.3 2.7 2.9 3.1 VCC - Supply Voltage - V Figure 4. VOH Values 8 100 µA 1.5 1.5 2.3 V - Output Voltage High - V OH V - Output Voltage High - V OH 4.0 OUTPUT VOLTAGE HIGH vs SUPPLY VOLTAGE 3.5 3.7 3.5 3.7 PACKAGE OPTION ADDENDUM www.ti.com 10-Dec-2020 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) (6) SN74CB3T3257DGVR ACTIVE TVSOP DGV 16 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 KS257 SN74CB3T3257PW ACTIVE TSSOP PW 16 90 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 KS257 SN74CB3T3257PWR ACTIVE TSSOP PW 16 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 KS257 SN74CB3T3257PWRE4 ACTIVE TSSOP PW 16 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 KS257 (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of