Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLogic ICsLogic IC - Transducer Converter, Bidirectional, Three-state SM 8

DCT OR DCU PACKAGE

(TOP VIEW)

CCA

GND

CCB

DIR

SN74LVC2T45-EP

www.ti.com

SCES777C –NOVEMBER 2008–REVISED JULY 2010

DUAL-BIT DUAL-SUPPLY BUS TRANSCEIVER

WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS

Check for Samples: SN74LVC2T45-EP

FEATURES

• Available in the Texas Instruments NanoFree™ SUPPORTS DEFENSE, AEROSPACE,

Package AND MEDICAL APPLICATIONS

• Controlled Baseline

• Fully Configurable Dual-Rail Design Allows

Each Port to Operate Over the Full 1.65-V to

• One Assembly/Test Site

5.5-V Power-Supply Range

• One Fabrication Site

• V

Isolation Feature – If Either V

Input Is at

• Available Temperature Ranges:

GND, Both Ports Are in the High-Impedance

– –55°C to 125°C

State

– –55°C to 150°C

• DIR Input Circuit Referenced to V

CCA

• Extended Product Life Cycle

• Low Power Consumption, 10-mA Max I

• Extended Product-Change Notification

• ±24-mA Output Drive at 3.3 V

• Product Traceability

• I

off

Supports Partial-Power-Down Mode

Operation

• Max Data Rates

– 420 Mbps (3.3-V to 5-V Translation)

– 210 Mbps (Translate to 3.3 V)

– 140 Mbps (Translate to 2.5 V)

– 75 Mbps (Translate to 1.8 V)

• Latch-Up Performance Exceeds 100 mA Per

JESD 78, Class II

• ESD Protection Exceeds JESD 22

– 4000-V Human-Body Model (A114-A)

– 200-V Machine Model (A115-A)

– 1000-V Charged-Device Model (C101)

DESCRIPTION/ORDERING INFORMATION

This dual-bit noninverting bus transceiver uses two separate configurable power-supply rails. The A port is

designed to track V

CCA

. V

CCA

accepts any supply voltage from 1.65 V to 5.5 V. The B port is designed to track

CCB

. V

CCB

accepts any supply voltage from 1.65 V to 5.5 V. This allows for universal low-voltage bidirectional

translation between any of the 1.8-V, 2.5-V, 3.3-V, and 5-V voltage nodes.

Table 1. ORDERING INFORMATION

(1)

PACKAGE

(2)

ORDERABLE PART NUMBER TOP-SIDE MARKING

–55°C to 125°C SSOP – DCT Reel of 250 SN74LVC2T45MDCTTEP NXR

–55°C to 150°C SSOP – DCU Reel of 250 SN74LVC2T45SDCUT CCVR

(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

website at www.ti.com.

(2) 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 (26 pages)

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SN74LVC2T45-EP www.ti.com SCES777C – NOVEMBER 2008 – REVISED JULY 2010 DUAL-BIT DUAL-SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS Check for Samples: SN74LVC2T45-EP FEATURES 1 • Available in the Texas Instruments NanoFree™ Package Fully Configurable Dual-Rail Design Allows Each Port to Operate Over the Full 1.65-V to 5.
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SN74LVC2T45-EP SCES777C – NOVEMBER 2008 – REVISED JULY 2010 www.ti.com DESCRIPTION/ORDERING INFORMATION (CONTINUED) The SN74LVC2T45 is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR) input activate either the B-port outputs or the A-port outputs. The device transmits data from the A bus to the B bus when the B-port outputs are activated, and from the B bus to the A bus when the A-port outputs are activated.
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SN74LVC2T45-EP www.ti.com SCES777C – NOVEMBER 2008 – REVISED JULY 2010 Absolute Maximum Ratings (1) over operating free-air temperature range (unless otherwise noted) MIN MAX Supply voltage range –0.5 6.5 V VI Input voltage range (2) –0.5 6.5 V VO Voltage range applied to any output in the high-impedance or power-off state (2) –0.5 6.5 V VO Voltage range applied to any output in the high or low state (2) A port –0.5 VCCA + 0.5 B port –0.5 VCCB + 0.
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SN74LVC2T45-EP SCES777C – NOVEMBER 2008 – REVISED JULY 2010 www.ti.com Recommended Operating Conditions (1) (2) (3) VCCI VCCA VCCB VCCO Supply voltage 1.65 V to 1.95 V High-level input voltage VIH Data inputs (4) MIN MAX 1.65 5.5 1.65 5.5 2.3 V to 2.7 V 1.7 3 V to 3.6 V Data inputs (4) VCCI × 0.7 VCCI × 0.35 2.3 V to 2.7 V 0.7 3 V to 3.6 V 0.8 4.5 V to 5.5 V High-level input voltage DIR (referenced to VCCA) (5) VCCA × 0.65 2.3 V to 2.7 V 1.7 3 V to 3.6 V 4.5 V to 5.
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SN74LVC2T45-EP www.ti.com SCES777C – NOVEMBER 2008 – REVISED JULY 2010 Electrical Characteristics (1) (2) over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS IOH = –100 mA IOH = –4 mA VOH IOH = –8 mA VI = VIH IOH = –24 mA Ioff B port 2.3 V 1.9 1.9 3V 3V 2.4 2.4 3.8 0.1 1.65 V 0.45 0.45 2.3 V 2.3 V 0.3 0.3 3V 3V 0.55 0.55 VI = VIL VI = VCCA or GND VI or VO = 0 to 5.
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SN74LVC2T45-EP SCES777C – NOVEMBER 2008 – REVISED JULY 2010 www.ti.com 1000.00 100.00 Estimated Life (Years) Electromigration Fail Mode 10.00 Wirebond Voiding Fail Mode 1.00 0.10 80 90 100 110 120 130 140 150 160 170 180 Continuous T A (°C) Notes: 1. See datasheet for absolute maximum and minimum recommended operating conditions. 2. Silicon operating life design goal is 10 years at 105°C junction temperature (does not include package interconnect life). 3.
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SN74LVC2T45-EP www.ti.com SCES777C – NOVEMBER 2008 – REVISED JULY 2010 Switching Characteristics over recommended operating free-air temperature range, VCCA = 1.8 V ± 0.15 V (unless otherwise noted) (see Figure 2) PARAMETER tPLH tPHL tPLH tPHL tPHZ tPLZ tPHZ tPLZ (1) tPZH (1) tPZL (1) tPZH (1) tPZL (1) FROM (INPUT) TO (OUTPUT) A B B A DIR A DIR B DIR A DIR B VCCB = 1.8 V ±0.15 V VCCB = 2.5 V ±0.2 V VCCB = 3.3 V ±0.3 V VCCB = 5 V ±0.
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SN74LVC2T45-EP SCES777C – NOVEMBER 2008 – REVISED JULY 2010 www.ti.com Switching Characteristics over recommended operating free-air temperature range, VCCA = 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 2) PARAMETER tPLH tPHL tPLH tPHL tPHZ tPLZ tPHZ tPLZ (1) tPZH (1) tPZL (1) tPZH (1) tPZL (1) FROM (INPUT) TO (OUTPUT) A B B A DIR A DIR B DIR A DIR B VCCB = 1.8 V ±0.15 V VCCB = 2.5 V ±0.2 V VCCB = 3.3 V ±0.3 V VCCB = 5 V ±0.
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SN74LVC2T45-EP www.ti.com SCES777C – NOVEMBER 2008 – REVISED JULY 2010 Operating Characteristics TA = 25°C PARAMETER CpdA CpdB (1) (1) A-port input, B-port output B-port input, A-port output (1) A-port input, B-port output B-port input, A-port output TEST CONDITIONS CL = 0 pF, f = 10 MHz, tr = tf = 1 ns CL = 0 pF, f = 10 MHz, tr = tf = 1 ns VCCA = VCCB = 1.8 V VCCA = VCCB = 2.5 V VCCA = VCCB = 3.
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SN74LVC2T45-EP SCES777C – NOVEMBER 2008 – REVISED JULY 2010 www.ti.com Power-Up Considerations A proper power-up sequence always should be followed to avoid excessive supply current, bus contention, oscillations, or other anomalies. To guard against such power-up problems, take the following precautions: 1. Connect ground before any supply voltage is applied. 2. Power up VCCA. 3. VCCB can be ramped up along with or after VCCA. Table 3.
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SN74LVC2T45-EP www.ti.com SCES777C – NOVEMBER 2008 – REVISED JULY 2010 TYPICAL CHARACTERISTICS abc TYPICAL PROPAGATION DELAY (A to B) vs LOAD CAPACITANCE TA = 25°C, VCCA = 1.8 V 10 9 8 VCCB = 1.8 V t PHL − ns 7 6 VCCB = 2.5 V 5 4 VCCB = 3.3 V 3 VCCB = 5 V 2 1 0 0 10 5 15 20 25 30 35 CL − pF 10 9 VCCB = 1.8 V 8 t PLH− ns 7 6 VCCB = 2.5 V 5 VCCB = 3.
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SN74LVC2T45-EP SCES777C – NOVEMBER 2008 – REVISED JULY 2010 www.ti.com TYPICAL PROPAGATION DELAY (B to A) vs LOAD CAPACITANCE TA = 25°C, VCCA = 1.8 V 10 9 8 VCCB = 1.8 V t PHL − ns 7 6 5 VCCB = 2.5 V VCCB = 3.3 V 4 VCCB = 5 V 3 2 1 0 0 5 10 15 20 25 30 35 25 30 35 CL − pF 10 9 VCCB = 1.8 V 8 VCCB = 2.5 V t PLH − ns 7 VCCB = 3.
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SN74LVC2T45-EP www.ti.com SCES777C – NOVEMBER 2008 – REVISED JULY 2010 TYPICAL PROPAGATION DELAY (A to B) vs LOAD CAPACITANCE TA = 25°C, VCCA = 2.5 V 10 9 8 t PHL − ns 7 VCCB = 1.8 V 6 5 VCCB = 2.5 V 4 3 VCCB = 3.3 V 2 VCCB = 5 V 1 0 0 5 10 15 20 25 30 35 30 35 CL − pF 10 9 VCCB = 1.8 V 8 t PLH − ns 7 6 5 VCCB = 2.5 V 4 VCCB = 3.
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SN74LVC2T45-EP SCES777C – NOVEMBER 2008 – REVISED JULY 2010 www.ti.com TYPICAL PROPAGATION DELAY (B to A) vs LOAD CAPACITANCE TA = 25°C, VCCA = 2.5 V 10 9 8 t PHL − ns 7 6 VCCB = 1.8 V 5 4 3 VCCB = 2.5 V VCCB = 3.3 V VCCB = 5 V 2 1 0 0 5 10 15 20 CL − pF 25 30 35 15 25 30 35 10 9 8 t PLH − ns 7 6 VCCB = 1.8 V 5 4 VCCB = 2.5 V VCCB = 3.
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SN74LVC2T45-EP www.ti.com SCES777C – NOVEMBER 2008 – REVISED JULY 2010 TYPICAL PROPAGATION DELAY (A to B) vs LOAD CAPACITANCE TA = 25°C, VCCA = 3.3 V 10 9 8 7 VCCB = 1.8 V t PHL − ns 6 5 VCCB = 2.5 V 4 3 2 VCCB = 3.3 V 1 VCCB = 5 V 0 0 5 10 15 20 25 30 35 25 30 35 CL − pF 10 9 VCCB = 1.8 V 8 7 t PLH − ns 6 VCCB = 2.5 V 5 4 VCCB = 3.
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SN74LVC2T45-EP SCES777C – NOVEMBER 2008 – REVISED JULY 2010 www.ti.com TYPICAL PROPAGATION DELAY (B to A) vs LOAD CAPACITANCE TA = 25°C, VCCA = 3.3 V 10 9 8 7 t PHL − ns 6 5 VCCB = 1.8 V 4 3 2 VCCB = 2.5 V VCCB = 3.3 V 1 VCCB = 5 V 0 0 5 10 15 20 25 30 35 20 25 30 35 CL − pF 10 9 8 7 t PLH − ns 6 VCCB = 1.8 V 5 4 3 VCCB = 2.5 V 2 VCCB = 3.
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SN74LVC2T45-EP www.ti.com SCES777C – NOVEMBER 2008 – REVISED JULY 2010 TYPICAL PROPAGATION DELAY (A to B) vs LOAD CAPACITANCE TA = 25°C, VCCA = 5 V 10 9 8 7 VCCB = 1.8 V t PHL − ns 6 5 4 VCCB = 2.5 V 3 2 VCCB = 3.3 V 1 0 VCCB = 5 V 0 5 10 15 20 25 30 35 25 30 35 CL − pF 10 9 8 VCCB = 1.8 V t PLH − ns 7 6 5 VCCB = 2.5 V 4 VCCB = 3.
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SN74LVC2T45-EP SCES777C – NOVEMBER 2008 – REVISED JULY 2010 www.ti.com TYPICAL PROPAGATION DELAY (B to A) vs LOAD CAPACITANCE TA = 25°C, VCCA = 5 V 10 9 8 7 t PHL− ns 6 5 4 VCCB = 1.8 V 3 VCCB = 2.5 V 2 VCCB = 3.3 V VCCB = 5 V 1 0 0 5 10 15 20 25 30 35 25 30 35 CL − pF 10 9 8 7 t PLH − ns 6 5 VCCB = 1.8 V 4 VCCB = 2.5 V 3 2 VCCB = 3.
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SN74LVC2T45-EP www.ti.com SCES777C – NOVEMBER 2008 – REVISED JULY 2010 PARAMETER MEASUREMENT INFORMATION 2 × VCCO S1 RL From Output Under Test Open GND CL (see Note A) TEST S1 tpd tPLZ/tPZL tPHZ/tPZH Open 2 × VCCO GND RL tw LOAD CIRCUIT VCCI VCCI/2 Input VCCO CL RL VTP 1.8 V ± 0.15 V 2.5 V ± 0.2 V 3.3 V ± 0.3 V 5 V ± 0.5 V 15 pF 15 pF 15 pF 15 pF 2 kΩ 2 kΩ 2 kΩ 2 kΩ 0.15 V 0.15 V 0.3 V 0.
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SN74LVC2T45-EP SCES777C – NOVEMBER 2008 – REVISED JULY 2010 www.ti.com APPLICATION INFORMATION The following shows an example of the SN74LVC2T45 being used in a unidirectional logic level-shifting application. VCC2 VCC1 VCC1 VCC2 1 8 2 7 3 6 4 5 VCC2 VCC1 SYSTEM-1 SYSTEM-2 PIN NAME FUNCTION 1 VCCA VCC1 SYSTEM-1 supply voltage (1.65 V to 5.5 V) 2 A1 OUT1 Output level depends on VCC1 voltage. 3 A2 OUT2 Output level depends on VCC1 voltage.
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SN74LVC2T45-EP www.ti.com SCES777C – NOVEMBER 2008 – REVISED JULY 2010 APPLICATION INFORMATION Figure 4 shows the SN74LVC2T45 being used in a bidirectional logic level-shifting application. Since the SN74LVC2T45 does not have an output-enable (OE) pin, the system designer should take precautions to avoid bus contention between SYSTEM-1 and SYSTEM-2 when changing directions.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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MECHANICAL DATA MPDS049B – MAY 1999 – REVISED OCTOBER 2002 DCT (R-PDSO-G8) PLASTIC SMALL-OUTLINE PACKAGE 0,30 0,15 0,65 8 0,13 M 5 0,15 NOM ÇÇÇÇÇ ÇÇÇÇÇ ÇÇÇÇÇ ÇÇÇÇÇ 2,90 2,70 4,25 3,75 Gage Plane PIN 1 INDEX AREA 1 0,25 4 0° – 8° 3,15 2,75 0,60 0,20 1,30 MAX Seating Plane 0,10 0,10 0,00 NOTES: A. B. C. D. 4188781/C 09/02 All linear dimensions are in millimeters. This drawing is subject to change without notice.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.