SN74LVC2T45DCTT

Part: SN74LVC2T45 Dual-Bit Dual-Supply Bus Transceiver, Texas Instruments

Type: Dual-Bit Dual-Supply Bus Transceiver

Description: This dual-bit noninverting bus transceiver uses two separate configurable power-supply rails, allowing universal low-voltage bidirectional translation between 1.8V, 2.5V, 3.3V, and 5V voltage nodes with data rates up to 420 Mbps.

Operating Conditions:

• Supply voltage: 1.65V to 5.5V
• Operating temperature: -40 to 85 °C
• Max data rates: 420 Mbps (3.3-V to 5-V translation)

Absolute Maximum Ratings:

• Max supply voltage: 6.5 V
• Max continuous current: 50 mA
• Max junction/storage temperature: 150 °C

Key Specs:

• Low power consumption: 4 μA maximum ICC
• High-level output current (IOH): -32 mA (at VCCO = 4.5V to 5.5V)
• Low-level output current (IOL): 32 mA (at VCCO = 4.5V to 5.5V)
• Input voltage range (VI): 0 to 5.5 V
• Output voltage range (VO): 0 to VCCO V
• Input capacitance (CI): 2.5 pF (at VCCA=3.3V, VCCB=3.3V)
• Output capacitance (CO): 6 pF (at VCCA=3.3V, VCCB=3.3V)
• Propagation delay (tPLH, A to B): 0.7 ns min, 5.6 ns max (VCCA=3.3V, VCCB=3.3V)

Features:

• Fully configurable dual-rail design allows each port to operate over the full 1.65-V to 5.5-V power-supply range
• VCC isolation feature - if either VCC input is at GND, both ports are in the high-impedance state
• Ioff supports Partial-Power-Down mode operation
• Maximum data rates up to 420 Mbps (3.3-V to 5-V translation)

Applications:

• Personal electronic
• Industrial
• Enterprise
• Telecom

Package:

• DCT (SM8, 8) - 2.95mm × 4mm
• DCU (VSSOP, 8) - 2mm × 3.1mm
• YZP (DSBGA, 8) - 1.5mm × 0.5mm

• Fully configurable dual-rail design allows each port to operate over the full 1.65-V to 5.5-V powersupply range
• VCC isolation feature - if either V CC input is at GND, both ports are in the high-impedance state
• DIR input circuit referenced to V CCA
• Available in the Texas Instruments NanoFree ™ package
• Low power consumption, 4-μA maximum ICC
• ±24-mA output drive at 3.3 V
• Ioff supports Partial-Power-Down mode operation
• Maximum 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)

• Personal electronic
• Industrial
• Enterprise
• Telecom

Functional Block Diagram

Functional Block Diagram

SN74LVC2T45

SCES516N - DECEMBER 2003 - REVISED JUNE 2024

Figure 4-1. DCT or DCU Package, 8-Pin SM8 or VSSOP (Top View)

Table 4-1. Pin Functions: DCT, DCU

(1) I = input, O = output, P = power, G =ground

7.2 Functional Block Diagram......................................... 14

7.3 Feature Description...................................................14

7.4 Device Functional Modes..........................................15

8 Application and Implementation

.................................. 16

8.1 Application Information............................................. 16

8.2 Typical Applications.................................................. 16

8.3 Power Supply Recommendations.............................19

8.4 Layout....................................................................... 19

9 Device and Documentation Support

............................21

9.1 Documentation Support............................................ 21

9.2 Receiving Notification of Documentation Updates....21

9.3 Support Resources................................................... 21

9.4 Trademarks............................................................... 21

9.5 Electrostatic Discharge Caution................................21

9.6 Glossary....................................................................21

10 Revision History

.......................................................... 21

11 Mechanical, Packaging, and Orderable

Information

.................................................................... 21

Figure 4-2. YZP Package, 8-Pin DSGBA (Bottom View)

Table 4-2. Pin Functions: YZP

over recommended operating free-air temperature range (unless otherwise noted) 1 2

over operating free-air temperature range (unless otherwise noted) (1)

• (2) The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.

(3) The value of VCC is provided in the Recommended Operating Conditions table.

over operating free-air temperature range (unless otherwise noted) (1) (2) (3)

The SN74LVC2T45 device can be used in level-translation applications for interfacing devices or systems operating at different interface voltages with one another. The maximum data rate can be up to 420Mbps when the device translates signal from 3.3V to 5V. It is recommended to tie all unused I/Os to GND. The device should not have any floating I/Os when changing translation direction.

• (1) For more information, see Section 11.
• (2) The package size (length × width) is a nominal value and includes pins, where applicable.