SN74AXC2T45DTMR

SN74AXC2T45 SCES880C – AUGUST 2019 – REVISED JUNE 2021 SN74AXC2T45 2-Bit Translating Transceiver with Configurable Level-Shifting 1 Features • • • • • • • • • Fully configurable dual-rail design allows each port to operate with a power supply range from 0.65 V to 3.6 V Operating temperature from –40°C to +125°C Glitch-free power supply sequencing Up to 380 Mbps support when translating from 1.8 V to 3.3 V VCC isolation feature – If either VCC input is below 100 mV, all I/Os outputs are disabled and become highimpedance Ioff supports partial-power-down mode operation Compatible with AVC family level shifters Latch-up performance exceeds 100 mA per JESD 78, Class II ESD protection exceeds JESD 22 – 8000-V human-body model – 1000-V charged-device model The SN74AXC2T45 device is designed for asynchronous communication between data buses. The device transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level of the direction-control input (DIR). The SN74AXC2T45 device is designed so the control pin (DIR) is referenced to VCCA. This device is fully specified for partial-power-down applications using the Ioff current. The Ioff protection circuitry ensures that no excessive current is drawn from or to an input, output, or combined I/O that is biased to a specific voltage while the device is powered down. The VCC isolation feature ensures that if either VCCA or VCCB is less than 100 mV, both I/O ports enter a high-impedance state by disabling their outputs. Glitch-free power supply sequencing allows either supply rail to be powered on or off in any order while providing robust power sequencing performance. 2 Applications • • • • • • Enterprise and communications Industrial Personal electronics Wireless infrastructure Building automation Point-of-sale 3 Description The SN74AXC2T45 is a two-bit noninverting bus transceiver that uses two individually configurable power-supply rails. The device is operational with both VCCA and VCCB supplies as low as 0.65 V. The A port is designed to track VCCA, which accepts any supply voltage from 0.65 V to 3.6 V. The B port is designed to track VCCB, which also accepts any supply voltage from 0.65 V to 3.6 V. Additionally the SN74AXC2T45 is compatible with a single-supply system. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) SN74AXC2T45DCT SM8 (8) 2.95 mm × 2.80 mm SN74AXC2T45DCU VSSOP (8) 2.30 mm × 2.00 mm SN74AXC2T45DTM X2SON (8) 1.35 mm × 0.80 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. VCCA VCCB DIR A1 B1 A2 B2 Functional Block Diagram An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. SN74AXC2T45 www.ti.com SCES880C – AUGUST 2019 – REVISED JUNE 2021 Table of Contents 1 Features............................................................................1 2 Applications..................................................................... 1 3 Description.......................................................................1 4 Revision History.............................................................. 2 5 Pin Configuration and Functions...................................3 6 Specifications.................................................................. 4 6.1 Absolute Maximum Ratings........................................ 4 6.2 ESD Ratings............................................................... 4 6.3 Recommended Operating Conditions.........................5 6.4 Thermal Information....................................................5 6.5 Electrical Characteristics.............................................6 6.6 Switching Characteristics, VCCA = 0.7 ± 0.05 V.......... 7 6.7 Switching Characteristics, VCCA = 0.8 ± 0.04 V.......... 8 6.8 Switching Characteristics, VCCA = 0.9 ± 0.045 V........ 9 6.9 Switching Characteristics, VCCA = 1.2 ± 0.1 V.......... 10 6.10 Switching Characteristics, VCCA = 1.5 ± 0.1 V........ 11 6.11 Switching Characteristics, VCCA = 1.8 ± 0.15 V...... 12 6.12 Switching Characteristics, VCCA = 2.5 ± 0.2 V........ 13 6.13 Switching Characteristics, VCCA = 3.3 ± 0.3 V........ 14 6.14 Operating Characteristics: TA = 25°C..................... 15 6.15 Typical Characteristics............................................ 16 7 Parameter Measurement Information.......................... 17 7.1 Load Circuit and Voltage Waveforms........................17 8 Detailed Description......................................................19 8.1 Overview................................................................... 19 8.2 Functional Block Diagram......................................... 19 8.3 Feature Description...................................................19 8.4 Device Functional Modes..........................................20 9 Application and Implementation.................................. 21 9.1 Application Information............................................. 21 9.2 Typical Application.................................................... 21 10 Power Supply Recommendations..............................23 11 Layout........................................................................... 23 11.1 Layout Guidelines................................................... 23 11.2 Layout Example...................................................... 23 12 Device and Documentation Support..........................24 12.1 Documentation Support.......................................... 24 12.2 Receiving Notification of Documentation Updates..24 12.3 Support Resources................................................. 24 12.4 Trademarks............................................................. 24 12.5 Electrostatic Discharge Caution..............................24 12.6 Glossary..................................................................24 13 Mechanical, Packaging, and Orderable Information.................................................................... 24 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision B (January 2020) to Revision C (June 2021) Page • Updated the numbering format for tables, figures, and cross-references throughout the document..................1 • Updated the Enable Times section...................................................................................................................21 Changes from Revision A (December 2019) to Revision B (January 2020) Page • Added DCU and DCT packages to datasheet.................................................................................................... 1 Changes from Revision * (August 2019) to Revision A (December 2019) Page • Changed from Advance Information to Production Data ................................................................................... 1 2 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: SN74AXC2T45 SN74AXC2T45 www.ti.com SCES880C – AUGUST 2019 – REVISED JUNE 2021 5 Pin Configuration and Functions VCCA 1 8 VCCB B1 A1 2 7 B1 6 B2 A2 3 6 B2 5 DIR GND 4 5 DIR VCCA 1 8 VCCB A1 2 7 A2 3 GND 4 Figure 5-2. DCU Package 8-Pin VSSOP Top View Figure 5-1. DCT Package 8-Pin SM8 Top View VCCA 1 VCCB 7 B1 6 B2 5 DIR 8 A1 2 4 A2 3 GND Figure 5-3. DTM Package 8-Pin X2SON Transparent Top View Table 5-1. Pin Functions PIN NAME NO. DESCRIPTION DTM, DCU, DCT A1 2 Input/output A1. Referenced to VCCA. A2 3 Input/output A2. Referenced to VCCA. B1 7 Input/output B1. Referenced to VCCB. B2 6 Input/output B2. Referenced to VCCB. DIR 5 Direction-control in for both ports. Referenced to VCCA GND 4 Ground VCCA 1 A-port power supply voltage. 0.65 V ≤ VCCA ≤ 3.6 V VCCB 8 B-port power supply voltage. 0.65 V ≤ VCCB ≤ 3.6 V Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: SN74AXC2T45 3 SN74AXC2T45 www.ti.com SCES880C – AUGUST 2019 – REVISED JUNE 2021 6 Specifications 6.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted)(1) MIN VCCA Supply voltage A VCCB Supply voltage B Input Voltage(2) VI 4.2 V V –0.5 4.2 I/O Ports (A Port) –0.5 4.2 I/O Ports (B Port) –0.5 4.2 Control Inputs –0.5 4.2 A Port –0.5 4.2 B Port –0.5 4.2 A Port –0.5 VCCA + 0.2 B Port –0.5 VCCB + 0.2 VO Voltage applied to any output in the high-impedance or power-off state(2) VO Voltage applied to any output in the high or low state(2) (3) IIK Input clamp current VI < 0 –50 IOK Output clamp current VO < 0 –50 IO Continuous output current Continuous current through VCC or GND Tj Junction Temperature Tstg Storage temperature (1) (2) (3) MAX UNITS –0.5 V V V mA mA –50 50 mA –100 100 mA 150 °C 150 °C –65 Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. The input voltage and output negative-voltage ratings may be exceeded if the input and output current ratings are observed. The output positive-voltage rating may be exceeded up to 4.2 V maximum if the output current rating is observed. 6.2 ESD Ratings VALUE Human body model (HBM), per ANSI/ESDA/JEDEC V(ESD) (1) (2) 4 Electrostatic discharge Charged device model (CDM), per JEDEC Specification JESD22-C101(2) JS-001(1) UNIT ±8000 ±1000 V JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: SN74AXC2T45 SN74AXC2T45 www.ti.com SCES880C – AUGUST 2019 – REVISED JUNE 2021 6.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted)(1) (2) MIN MAX UNIT VCCA Supply voltage A 0.65 3.6 V VCCB Supply voltage B 0.65 3.6 V Data Inputs VCCI = 0.65 V – 0.75 V VCCI × 0.70 VCCI = 0.76 V – 1 V VCCI × 0.70 VCCI = 1.1 V – 1.95 V VCCI × 0.65 VCCI = 2.3 V – 2.7 V VIH 1.6 VCCI = 3 V – 3.6 V High-level input voltage Control Input (DIR), Referenced to VCCA 2 VCCA = 0.65 V – 0.75 V VCCA × 0.70 VCCA = 0.76 V – 1 V VCCA × 0.70 VCCA = 1.1 V – 1.95 V VCCA × 0.65 VCCA = 2.3 V – 2.7 V 1.6 VCCA = 3 V – 3.6 V Data Inputs VIL Low-level input voltage Control Input (DIR), Referenced to VCCA 2 VCCI = 0.65 V – 0.75 V VCCI x 0.30 VCCI = 0.76 V – 1 V VCCI x 0.30 VCCI = 1.1 V – 1.95 V VCCI x 0.35 VCCI = 2.3 V – 2.7 V 0.7 VCCI = 3 V – 3.6 V 0.8 VCCA = 0.65 V – 0.75 V VCCA × 0.30 VCCA = 0.76 V – 1 V VCCA × 0.30 VCCA = 1.1 V – 1.95 V VCCA × 0.35 VCCA = 2.3 V – 2.7 V 0.7 VCCA = 3 V – 3.6 V VI Input voltage VO Output voltage Δt/Δv(2) Input transition rise and fall time Δt/Δv(3) Single channel input transition rise and fall time TA Operating free-air temperature (1) (2) (3) V 0.8 0 3.6 Active State 0 VCCO Tri-State 0 3.6 –40 V V 10 ns/V 100 ns/V 125 °C VCCI is the VCC associated with the input port. VCCO is the VCC associated with the output port. All unused 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, SCBA004. Input transition rate of a single channel while the other channels are at a valid logic state and not switching. 6.4 Thermal Information SN74AXC2T45 THERMAL METRIC (1) DCT (SM8) DCU (VSSOP) DTM (X2SON) UNIT RθJA Junction-to-ambient thermal resistance 223.5 242.9 225.9 °C/W RθJC(top) Junction-to-case (top) thermal resistance 120.7 96.2 131.6 °C/W RθJB Junction-to-board thermal resistance 138.0 153.3 141.3 °C/W YJT Junction-to-top characterization parameter 47.5 38.2 12.7 °C/W YJB Junction-to-board characterization parameter 136.7 152.5 140.9 °C/W (1) For more information about thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report. Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: SN74AXC2T45 5 SN74AXC2T45 www.ti.com SCES880C – AUGUST 2019 – REVISED JUNE 2021 6.5 Electrical Characteristics over operating free-air temperature range (unless otherwise noted) (1) (2) (3) Operating free-air temperature (TA) PARAMETER TEST CONDITIONS VCCA VCCB -40°C to 85°C MIN VOH VOL II Ioff Low-level VI = VIL output voltage Input leakage current Partial power down current UNIT MAX 0.55 0.55 0.76 V 0.76 V 0.58 0.58 0.85 V 0.85 V 0.65 0.65 IOH = -3 mA 1.1 V 1.1 V 0.85 0.85 IOH = -6 mA 1.4 V 1.4 V 1.05 1.05 IOH = -8 mA 1.65 V 1.65 V 1.2 1.2 IOH = -9 mA 2.3 V 2.3 V 1.75 1.75 IOH = -12 mA 3V 3V IOL = 100 µA 0.7 V – 3.6 V 0.7 V – 3.6 V IOL = 50 µA 0.65 V 0.65 V 0.1 0.1 IOL = 200 µA 0.76 V 0.76 V 0.18 0.18 IOL = 500 µA 0.85 V 0.85 V 0.2 0.2 IOL = 3 mA 1.1 V 1.1 V 0.25 0.25 IOL = 6 mA 1.4 V 1.4 V 0.35 0.35 IOL = 8 mA 1.65 V 1.65 V 0.45 0.45 IOL = 9 mA 2.3 V 2.3 V 0.55 0.55 IOL = 12 mA 3V 3V 0.7 0.7 IOH = -50 µA 0.65 V IOH = -200 µA IOH = -500 µA 2.3 V 2.3 0.1 0.1 V Control input (DIR):VI = VCCA or GND 0.65 V – 3.6 V 0.65 V – 3.6 V -0.5 0.5 -1 1 µA Data Inputs (Ax, Bx),VI = VCCI or GND 0.65 V – 3.6 V 0.65 V – 3.6 V -4 4 -8 8 µA A Port: VI or VO = 0 V – 3.6 V 0V 0 V – 3.6 V -4 4 -8 8 B Port: VI or VO = 0 V – 3.6 V 0 V – 3.6 V 0V -4 4 -8 8 µA 0.65 V – 3.6 V 0.65 V – 3.6 V IO = 0 VI = ICCA + Combined VCCI or ICCB supply current GND IO = 0 VCCB supply current TYP 0.65 V 0.7 V – 3.6 V VI = VCCI or GND ICCB MIN VCCO -0.1 0.7 V – 3.6 V IO = 0 VCCA supply current -40°C to 125°C MAX VCCO -0.1 IOH = -100 µA VI = VCCI or GND ICCA 0V 3.6 V 3.6 V 0V 8 -2 14 µA -12 4 8 0.65 V – 3.6 V 0.65 V – 3.6 V 8 14 0V 3.6 V 4 8 µA 3.6 V 0V 23 µA -2 -12 0.65 V – 3.6 V 0.65 V – 3.6 V 16 Ci Control Input (DIR) Capacitance VI = 3.3 V or GND 3.3 V 3.3 V 3.3 3.3 pF Cio Data I/O Capacitance VO = 1.65 V DC +1 MHz -16 dBm sine wave 3.3 V 3.3 V 5.4 5.4 pF (1) (2) (3) 6 High-level VI = VIH output voltage TYP VCCI is the VCC associated with the input port. VCCO is the VCC associated with the output port. All typical data is taken at 25°C. Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: SN74AXC2T45 SN74AXC2T45 www.ti.com SCES880C – AUGUST 2019 – REVISED JUNE 2021 6.6 Switching Characteristics, VCCA = 0.7 ± 0.05 V See Figure 5 and Table 1 for test circuit and loading. See Figure 6, Figure 7, and Figure 8 for measurement waveforms. B-Port Supply Voltage (VCCB) PARAMETER tpd tdis FROM A B B A DIR A DIR B Propagation delay Disable time DIR ten TO A Enable time DIR B Test Conditions 0.7 ± 0.05 V 0.8 ± 0.04 V 0.9 ± 0.045 V 1.2 ± 0.1 V 1.5 ± 0.1 V 1.8 ± 0.15 V 2.5 ± 0.2 V 3.3 ± 0.3 V MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX -40°C to 85°C 0.5 170 0.5 115 0.5 84 0.5 50 0.5 50 0.5 56 0.5 71 0.5 106 -40°C to 125°C 0.5 170 0.5 115 0.5 84 0.5 50 0.5 50 0.5 56 0.5 71 0.5 106 -40°C to 85°C 0.5 170 0.5 149 0.5 122 0.5 83 0.5 79 0.5 78 0.5 77 0.5 76 -40°C to 125°C 0.5 170 0.5 149 0.5 122 0.5 83 0.5 79 0.5 78 0.5 77 0.5 76 -40°C to 85°C 0.5 140 0.5 140 0.5 140 0.5 140 0.5 140 0.5 140 0.5 140 0.5 140 -40°C to 125°C 0.5 140 0.5 140 0.5 140 0.5 140 0.5 140 0.5 140 0.5 140 0.5 140 -40°C to 85°C 0.5 143 0.5 105 0.5 84 0.5 41 0.5 39 0.5 42 0.5 56 0.5 107 -40°C to 125°C 0.5 143 0.5 105 0.5 84 0.5 41 0.5 39 0.5 42 0.5 56 0.5 107 -40°C to 85°C 0.5 311 0.5 311 0.5 311 0.5 311 0.5 311 0.5 311 0.5 311 0.5 311 -40°C to 125°C 0.5 311 0.5 311 0.5 311 0.5 311 0.5 311 0.5 311 0.5 311 0.5 311 -40°C to 85°C 0.5 306 0.5 247 0.5 216 0.5 186 0.5 182 0.5 183 0.5 194 0.5 228 -40°C to 125°C 0.5 306 0.5 247 0.5 216 0.5 186 0.5 182 0.5 183 0.5 194 0.5 228 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: SN74AXC2T45 UNIT ns ns ns 7 SN74AXC2T45 www.ti.com SCES880C – AUGUST 2019 – REVISED JUNE 2021 6.7 Switching Characteristics, VCCA = 0.8 ± 0.04 V See Figure 5 and Table 1 for test circuit and loading. See Figure 6, Figure 7, and Figure 8 for measurement waveforms. B-Port Supply Voltage (VCCB) PARAMETER tpd tdis FROM A B B A DIR A DIR B Propagation delay Disable time DIR ten (1) 8 A Enable time DIR (1) TO B Test Conditions 0.7 ± 0.05 V 0.8 ± 0.04 V 0.9 ± 0.045 V 1.2 ± 0.1 V 1.5 ± 0.1 V 1.8 ± 0.15 V 2.5 ± 0.2 V 3.3 ± 0.3 V MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX -40°C to 85°C 0.5 150 0.5 94 0.5 63 0.5 33 0.5 28 0.5 27 0.5 28 0.5 34 -40°C to 125°C 0.5 150 0.5 94 0.5 63 0.5 33 0.5 28 0.5 27 0.5 28 0.5 34 -40°C to 85°C 0.5 115 0.5 94 0.5 76 0.5 50 0.5 41 0.5 40 0.5 38 0.5 38 -40°C to 125°C 0.5 115 0.5 94 0.5 76 0.5 50 0.5 41 0.5 40 0.5 38 0.5 38 -40°C to 85°C 0.5 96 0.5 96 0.5 96 0.5 96 0.5 96 0.5 96 0.5 96 0.5 96 -40°C to 125°C 0.5 96 0.5 96 0.5 96 0.5 96 0.5 96 0.5 96 0.5 96 0.5 96 -40°C to 85°C 0.5 136 0.5 97 0.5 76 0.5 33 0.5 27 0.5 26 0.5 28 0.5 35 -40°C to 125°C 0.5 136 0.5 97 0.5 76 0.5 33 0.5 27 0.5 26 0.5 28 0.5 35 -40°C to 85°C 0.5 246 0.5 246 0.5 246 0.5 246 0.5 246 0.5 246 0.5 246 0.5 246 -40°C to 125°C 0.5 246 0.5 246 0.5 246 0.5 246 0.5 246 0.5 246 0.5 246 0.5 246 -40°C to 85°C 0.5 243 0.5 188 0.5 157 0.5 128 0.5 123 0.5 122 0.5 123 0.5 125 -40°C to 125°C 0.5 243 0.5 188 0.5 157 0.5 128 0.5 123 0.5 122 0.5 123 0.5 125 UNIT ns ns ns The enable time is a calculated value, derived using the formula shown in the Enable Times section. Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: SN74AXC2T45 SN74AXC2T45 www.ti.com SCES880C – AUGUST 2019 – REVISED JUNE 2021 6.8 Switching Characteristics, VCCA = 0.9 ± 0.045 V See Figure 5 and Table 1 for test circuit and loading. See Figure 6, Figure 7, and Figure 8 for measurement waveforms. B-Port Supply Voltage (VCCB) PARAMETER tpd tdis FROM A B B A DIR A DIR B Propagation delay Disable time DIR ten (1) A Enable time DIR (1) TO B Test Conditions 0.7 ± 0.05 V 0.8 ± 0.04 V 0.9 ± 0.045 V 1.2 ± 0.1 V 1.5 ± 0.1 V 1.8 ± 0.15 V 2.5 ± 0.2 V 3.3 ± 0.3 V MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX -40°C to 85°C 0.5 122 0.5 76 0.5 51 0.5 23 0.5 18 0.5 16 0.5 15 0.5 17 -40°C to 125°C 0.5 122 0.5 76 0.5 51 0.5 23 0.5 18 0.5 16 0.5 15 0.5 17 -40°C to 85°C 0.5 84 0.5 63 0.5 51 0.5 39 0.5 28 0.5 24 0.5 21 0.5 21 -40°C to 125°C 0.5 84 0.5 63 0.5 51 0.5 39 0.5 28 0.5 24 0.5 21 0.5 21 -40°C to 85°C 0.5 74 0.5 74 0.5 74 0.5 74 0.5 74 0.5 74 0.5 74 0.5 74 -40°C to 125°C 0.5 74 0.5 74 0.5 74 0.5 74 0.5 74 0.5 74 0.5 74 0.5 74 -40°C to 85°C 0.5 133 0.5 94 0.5 73 0.5 30 0.5 23 0.5 22 0.5 20 0.5 22 -40°C to 125°C 0.5 133 0.5 94 0.5 73 0.5 31 0.5 24 0.5 22 0.5 20 0.5 23 -40°C to 85°C 0.5 211 0.5 211 0.5 211 0.5 211 0.5 211 0.5 211 0.5 211 0.5 211 -40°C to 125°C 0.5 211 0.5 211 0.5 211 0.5 211 0.5 211 0.5 211 0.5 211 0.5 211 -40°C to 85°C 0.5 192 0.5 146 0.5 120 0.5 93 0.5 88 0.5 86 0.5 85 0.5 87 -40°C to 125°C 0.5 192 0.5 146 0.5 120 0.5 93 0.5 88 0.5 86 0.5 85 0.5 87 UNIT ns ns ns The enable time is a calculated value, derived using the formula shown in the Enable Times section. Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: SN74AXC2T45 9 SN74AXC2T45 www.ti.com SCES880C – AUGUST 2019 – REVISED JUNE 2021 6.9 Switching Characteristics, VCCA = 1.2 ± 0.1 V See Figure 5 and Table 1 for test circuit and loading. See Figure 6, Figure 7, and Figure 8 for measurement waveforms. B-Port Supply Voltage (VCCB) PARAMETER tpd tdis FROM A B B A DIR A DIR B Propagation delay Disable time DIR ten (1) 10 A Enable time DIR (1) TO B Test Conditions 0.7 ± 0.05 V 0.8 ± 0.04 V 0.9 ± 0.045 V 1.2 ± 0.1 V 1.5 ± 0.1 V 1.8 ± 0.15 V 2.5 ± 0.2 V 3.3 ± 0.3 V UNIT MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX -40°C to 85°C 0.5 84 0.5 51 0.5 38 0.5 15 0.5 10 0.5 9 0.5 7 0.5 8 -40°C to 125°C 0.5 84 0.5 51 0.5 38 0.5 15 0.5 11 0.5 9 0.5 8 0.5 8 -40°C to 85°C 0.5 50 0.5 33 0.5 23 0.5 15 0.5 12 0.5 10 0.5 8 0.5 7 -40°C to 125°C 0.5 50 0.5 33 0.5 23 0.5 15 0.5 12 0.5 10 0.5 8 0.5 7 -40°C to 85°C 0.5 26 0.5 26 0.5 26 0.5 26 0.5 26 0.5 26 0.5 26 0.5 26 -40°C to 125°C 0.5 27 0.5 27 0.5 27 0.5 27 0.5 27 0.5 27 0.5 27 0.5 27 -40°C to 85°C 0.5 129 0.5 90 0.5 70 0.5 27 0.5 20 0.5 18 0.5 15 0.5 15 -40°C to 125°C 0.5 129 0.5 90 0.5 71 0.5 28 0.5 21 0.5 19 0.5 16 0.5 16 -40°C to 85°C 0.5 177 0.5 177 0.5 177 0.5 177 0.5 177 0.5 177 0.5 177 0.5 177 -40°C to 125°C 0.5 177 0.5 177 0.5 177 0.5 177 0.5 177 0.5 177 0.5 177 0.5 177 -40°C to 85°C 0.5 105 0.5 71 0.5 59 0.5 40 0.5 36 0.5 35 0.5 33 0.5 34 -40°C to 125°C 0.5 105 0.5 71 0.5 59 0.5 41 0.5 37 0.5 36 0.5 34 0.5 35 ns ns ns The enable time is a calculated value, derived using the formula shown in the Enable Times section. Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: SN74AXC2T45 SN74AXC2T45 www.ti.com SCES880C – AUGUST 2019 – REVISED JUNE 2021 6.10 Switching Characteristics, VCCA = 1.5 ± 0.1 V See Figure 5 and Table 1 for test circuit and loading. See Figure 6, Figure 7, and Figure 8 for measurement waveforms. B-Port Supply Voltage (VCCB) PARAMETER tpd tdis FROM A B B A DIR A DIR B Propagation delay Disable time DIR ten (1) A Enable time DIR (1) TO B Test Conditions 0.7 ± 0.05 V 0.8 ± 0.04 V 0.9 ± 0.045 V 1.2 ± 0.1 V 1.5 ± 0.1 V 1.8 ± 0.15 V 2.5 ± 0.2 V 3.3 ± 0.3 V UNIT MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX -40°C to 85°C 0.5 79 0.5 41 0.5 28 0.5 12 0.5 9 0.5 7 0.5 6 0.5 6 -40°C to 125°C 0.5 79 0.5 41 0.5 28 0.5 12 0.5 9 0.5 8 0.5 6 0.5 6 -40°C to 85°C 0.5 50 0.5 28 0.5 18 0.5 10 0.5 9 0.5 8 0.5 6 0.5 5 -40°C to 125°C 0.5 50 0.5 28 0.5 18 0.5 11 0.5 9 0.5 8 0.5 6 0.5 5 -40°C to 85°C 0.5 18 0.5 18 0.5 18 0.5 18 0.5 18 0.5 18 0.5 18 0.5 18 -40°C to 125°C 0.5 19 0.5 19 0.5 19 0.5 19 0.5 19 0.5 19 0.5 19 0.5 19 -40°C to 85°C 0.5 128 0.5 89 0.5 69 0.5 26 0.5 19 0.5 17 0.5 13 0.5 13 -40°C to 125°C 0.5 128 0.5 89 0.5 70 0.5 27 0.5 20 0.5 18 0.5 14 0.5 14 -40°C to 85°C 0.5 172 0.5 172 0.5 172 0.5 172 0.5 172 0.5 172 0.5 172 0.5 172 -40°C to 125°C 0.5 172 0.5 172 0.5 172 0.5 172 0.5 172 0.5 172 0.5 172 0.5 172 -40°C to 85°C 0.5 92 0.5 54 0.5 42 0.5 31 0.5 27 0.5 25 0.5 24 0.5 24 -40°C to 125°C 0.5 92 0.5 54 0.5 42 0.5 31 0.5 28 0.5 26 0.5 25 0.5 25 ns ns ns The enable time is a calculated value, derived using the formula shown in the Enable Times section. Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: SN74AXC2T45 11 SN74AXC2T45 www.ti.com SCES880C – AUGUST 2019 – REVISED JUNE 2021 6.11 Switching Characteristics, VCCA = 1.8 ± 0.15 V See Figure 5 and Table 1 for test circuit and loading. See Figure 6, Figure 7, and Figure 8 for measurement waveforms. B-Port Supply Voltage (VCCB) PARAMETER tpd tdis FROM A B B A DIR A DIR B Propagation delay Disable time DIR ten (1) 12 A Enable time DIR (1) TO B Test Conditions 0.7 ± 0.05 V 0.8 ± 0.04 V 0.9 ± 0.045 V 1.2 ± 0.1 V 1.5 ± 0.1 V 1.8 ± 0.15 V 2.5 ± 0.2 V 3.3 ± 0.3 V UNIT MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX -40°C to 85°C 0.5 78 0.5 40 0.5 24 0.5 10 0.5 8 0.5 7 0.5 5 0.5 5 -40°C to 125°C 0.5 78 0.5 40 0.5 24 0.5 10 0.5 8 0.5 7 0.5 6 0.5 5 -40°C to 85°C 0.5 56 0.5 27 0.5 16 0.5 9 0.5 7 0.5 7 0.5 5 0.5 4 -40°C to 125°C 0.5 56 0.5 27 0.5 16 0.5 9 0.5 8 0.5 7 0.5 5 0.5 5 -40°C to 85°C 0.5 16 0.5 16 0.5 16 0.5 16 0.5 16 0.5 16 0.5 16 0.5 16 -40°C to 125°C 0.5 17 0.5 17 0.5 17 0.5 17 0.5 17 0.5 17 0.5 17 0.5 17 -40°C to 85°C 0.5 127 0.5 88 0.5 69 0.5 25 0.5 18 0.5 16 0.5 12 0.5 12 -40°C to 125°C 0.5 127 0.5 88 0.5 70 0.5 26 0.5 19 0.5 17 0.5 13 0.5 13 -40°C to 85°C 0.5 171 0.5 171 0.5 171 0.5 171 0.5 171 0.5 171 0.5 171 0.5 171 -40°C to 125°C 0.5 171 0.5 171 0.5 171 0.5 171 0.5 171 0.5 171 0.5 171 0.5 171 -40°C to 85°C 0.5 89 0.5 50 0.5 36 0.5 26 0.5 23 0.5 22 0.5 21 0.5 20 -40°C to 125°C 0.5 89 0.5 50 0.5 36 0.5 27 0.5 24 0.5 23 0.5 22 0.5 21 ns ns ns The enable time is a calculated value, derived using the formula shown in the Enable Times section. Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: SN74AXC2T45 SN74AXC2T45 www.ti.com SCES880C – AUGUST 2019 – REVISED JUNE 2021 6.12 Switching Characteristics, VCCA = 2.5 ± 0.2 V See Figure 5 and Table 1 for test circuit and loading. See Figure 6, Figure 7, and Figure 8 for measurement waveforms. B-Port Supply Voltage (VCCB) PARAMETER tpd tdis FROM A B B A DIR A DIR B Propagation delay Disable time DIR ten (1) A Enable time DIR (1) TO B Test Conditions 0.7 ± 0.05 V 0.8 ± 0.04 V 0.9 ± 0.045 V 1.2 ± 0.1 V 1.5 ± 0.1 V 1.8 ± 0.15 V 2.5 ± 0.2 V 3.3 ± 0.3 V UNIT MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX -40°C to 85°C 0.5 77 0.5 38 0.5 21 0.5 8 0.5 6 0.5 5 0.5 5 0.5 4 -40°C to 125°C 0.5 77 0.5 38 0.5 21 0.5 8 0.5 6 0.5 5 0.5 5 0.5 5 -40°C to 85°C 0.5 71 0.5 28 0.5 15 0.5 7 0.5 6 0.5 5 0.5 5 0.5 4 -40°C to 125°C 0.5 71 0.5 28 0.5 15 0.5 8 0.5 6 0.5 6 0.5 5 0.5 4 -40°C to 85°C 0.5 11 0.5 11 0.5 11 0.5 11 0.5 11 0.5 11 0.5 11 0.5 11 -40°C to 125°C 0.5 12 0.5 12 0.5 12 0.5 12 0.5 12 0.5 12 0.5 12 0.5 12 -40°C to 85°C 0.5 127 0.5 88 0.5 68 0.5 25 0.5 18 0.5 15 0.5 12 0.5 11 -40°C to 125°C 0.5 127 0.5 88 0.5 69 0.5 26 0.5 19 0.5 16 0.5 12 0.5 12 -40°C to 85°C 0.5 182 0.5 182 0.5 182 0.5 182 0.5 182 0.5 182 0.5 182 0.5 182 -40°C to 125°C 0.5 182 0.5 182 0.5 182 0.5 182 0.5 182 0.5 182 0.5 182 0.5 182 -40°C to 85°C 0.5 84 0.5 46 0.5 29 0.5 18 0.5 17 0.5 16 0.5 15 0.5 15 -40°C to 125°C 0.5 84 0.5 46 0.5 29 0.5 19 0.5 18 0.5 17 0.5 16 0.5 16 ns ns ns The enable time is a calculated value, derived using the formula shown in the Enable Times section. Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: SN74AXC2T45 13 SN74AXC2T45 www.ti.com SCES880C – AUGUST 2019 – REVISED JUNE 2021 6.13 Switching Characteristics, VCCA = 3.3 ± 0.3 V See Figure 5 and Table 1 for test circuit and loading. See Figure 6, Figure 7, and Figure 8 for measurement waveforms. B-Port Supply Voltage (VCCB) PARAMETER tpd tdis FROM A B B A DIR A DIR B Propagation delay Disable time DIR ten (1) 14 A Enable time DIR (1) TO B Test Condtions 0.7 ± 0.05 V 0.8 ± 0.04 V 0.9 ± 0.045 V 1.2 ± 0.1 V 1.5 ± 0.1 V 1.8 ± 0.15 V 2.5 ± 0.2 V 3.3 ± 0.3 V UNIT MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX -40°C to 85°C 0.5 76 0.5 38 0.5 21 0.5 7 0.5 5 0.5 4 0.5 4 0.5 4 -40°C to 125°C 0.5 76 0.5 38 0.5 21 0.5 7 0.5 5 0.5 5 0.5 4 0.5 4 -40°C to 85°C 0.5 105 0.5 34 0.5 17 0.5 8 0.5 6 0.5 5 0.5 4 0.5 4 -40°C to 125°C 0.5 105 0.5 34 0.5 17 0.5 8 0.5 6 0.5 5 0.5 5 0.5 4 -40°C to 85°C 0.5 10 0.5 10 0.5 10 0.5 10 0.5 10 0.5 10 0.5 10 0.5 10 -40°C to 125°C 0.5 11 0.5 11 0.5 11 0.5 11 0.5 11 0.5 11 0.5 11 0.5 11 -40°C to 85°C 0.5 128 0.5 88 0.5 68 0.5 24 0.5 17 0.5 15 0.5 11 0.5 11 -40°C to 125°C 0.5 128 0.5 88 0.5 69 0.5 26 0.5 19 0.5 16 0.5 12 0.5 11 -40°C to 85°C 0.5 218 0.5 218 0.5 218 0.5 218 0.5 218 0.5 218 0.5 218 0.5 218 -40°C to 125°C 0.5 218 0.5 218 0.5 218 0.5 218 0.5 218 0.5 218 0.5 218 0.5 218 -40°C to 85°C 0.5 83 0.5 45 0.5 28 0.5 17 0.5 15 0.5 14 0.5 14 0.5 14 -40°C to 125°C 0.5 83 0.5 45 0.5 28 0.5 18 0.5 16 0.5 15 0.5 15 0.5 15 ns ns ns The enable time is a calculated value, derived using the formula shown in the Enable Times section. Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: SN74AXC2T45 SN74AXC2T45 www.ti.com SCES880C – AUGUST 2019 – REVISED JUNE 2021 6.14 Operating Characteristics: TA = 25°C PARAMETER Power Dissipation Capacitance per transceiver (A to B) CpdA Power Dissipation Capacitance per transceiver (B to A) Power Dissipation Capacitance per transceiver (A to B) CpdB Power Dissipation Capacitance per transceiver (B to A) TEST CONDITIONS VCCA VCCB MIN TYP 0.7 V 0.7 V 2.2 0.8 V 0.8 V 2.0 0.9 V 0.9 V 2.0 CL = 0, RL = Open f = 1 1.2 V MHz, tr = tf = 1 ns 1.5 V 1.2 V 2.0 1.5 V 2.0 1.8 V 1.8 V 2.1 2.5 V 2.5 V 2.5 3.3 V 3.3 V 3.0 0.7 V 0.7 V 10.6 0.8 V 0.8 V 10.7 0.9 V 0.9 V 10.6 CL = 0, RL = Open f = 1 1.2 V MHz, tr = tf = 1 ns 1.5 V 1.2 V 10.8 1.5 V 11.1 1.8 V 1.8 V 12.2 2.5 V 2.5 V 15.9 3.3 V 3.3 V 19.6 0.7 V 0.7 V 10.6 0.8 V 0.8 V 10.7 0.9 V 0.9 V 10.6 CL = 0, RL = Open f = 1 1.2 V MHz, tr = tf = 1 ns 1.5 V 1.2 V 10.8 1.5 V 11.1 1.8 V 1.8 V 12.2 2.5 V 2.5 V 15.8 3.3 V 3.3 V 19.3 0.7 V 0.7 V 2.2 0.8 V 0.8 V 2.0 0.9 V 0.9 V 2.0 CL = 0, RL = Open f = 1 1.2 V MHz, tr = tf = 1 ns 1.5 V 1.2 V 2.0 1.5 V 2.0 1.8 V 1.8 V 2.1 2.5 V 2.5 V 2.5 3.3 V 3.3 V 3.0 MAX UNIT pF pF pF pF Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: SN74AXC2T45 15 SN74AXC2T45 www.ti.com SCES880C – AUGUST 2019 – REVISED JUNE 2021 6.15 Typical Characteristics 3.4 VCC = 1.8V VCC = 2.5V VCC = 3.3V 3.2 3 2.6 VOH (V) VOH (V) 2.8 2.4 2.2 2 1.8 1.6 1.4 0 2 4 6 8 10 12 IOH (mA) 14 16 18 D001 0.5 1 1.5 2 2.5 3 IOH (mA) 3.5 4 4.5 5 D001 Figure 6-2. Typical (TA=25°C) Output High Voltage (VOH) vs Source Current (IOH) 220 700 650 600 550 500 450 400 350 300 250 200 150 100 50 0 -50 200 180 160 140 VOL (mV) VOL (mV) VCC = 0.7V VCC = 1.2V 0 20 Figure 6-1. Typical (TA=25°C) Output High Voltage (VOH) vs Source Current (IOH) 120 100 80 60 40 VCC = 1.8V VCC = 2.5V VCC = 3.3V VCC = 0.7V VCC = 1.2V 20 0 0 2 4 6 8 10 12 IOL (mA) 14 16 18 20 0 0.5 D001 Figure 6-3. Typical (TA=25°C) Output High Voltage (VOL) vs Sink Current (IOL) 16 1.25 1.2 1.15 1.1 1.05 1 0.95 0.9 0.85 0.8 0.75 0.7 0.65 0.6 0.55 1 1.5 2 2.5 3 IOL (mA) 3.5 4 4.5 5 D001 Figure 6-4. Typical (TA=25°C) Output High Voltage (VOL) vs Sink Current (IOL) Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: SN74AXC2T45 SN74AXC2T45 www.ti.com SCES880C – AUGUST 2019 – REVISED JUNE 2021 7 Parameter Measurement Information 7.1 Load Circuit and Voltage Waveforms Unless otherwise noted, all input pulses are supplied by generators having the following characteristics: • f = 1 MHz • ZO = 50 Ω • dv/dt ≤ 1 ns/V Measurement Point 2 x VCCO S1 RL Open Output Pin Under Test GND CL(1) A. RL CL includes probe and jig capacitance. Figure 7-1. Load Circuit Table 7-1. Load Circuit Conditions Δt/Δv tpd Parameter VCCO RL CL S1 VTP Input transition rise or fall rate 0.65 V – 3.6 V 1 MΩ 15 pF Open N/A 1.1 V – 3.6 V 2 kΩ 15 pF Open N/A 0.65 V – 0.95 V 20 kΩ 15 pF Open N/A Propagation (delay) time ten, tdis Enable time, disable time ten, tdis Enable time, disable time 3 V – 3.6 V 2 kΩ 15 pF 2 × VCCO 0.3 V 1.65 V – 2.7 V 2 kΩ 15 pF 2 × VCCO 0.15 V 1.1 V – 1.6 V 2 kΩ 15 pF 2 × VCCO 0.1 V 0.65 V – 0.95 V 20 kΩ 15 pF 2 × VCCO 0.1 V 3 V – 3.6 V 2 kΩ 15 pF GND 0.3 V 1.65 V – 2.7 V 2 kΩ 15 pF GND 0.15 V 1.1 V – 1.6 V 2 kΩ 15 pF GND 0.1 V 0.65 V – 0.95 V 20 kΩ 15 pF GND 0.1 V VCCI(1) VCCI(1) Input A, B Input A, B VCCI / 2 VCCI / 2 500 ps/V ± 10 ns/V 0V tpd VCCI / 2 Output B, A VCCI / 2 VOL(2) 1. 2. 0V VOH(2) tpd VOH(2) Output B, A 100 kHz VCCI is the supply pin associated with the input port. VOH and VOL are typical output voltage levels that occur with specified RL, CL, and S1 1. 2. Ensure Monotonic Rising and Falling Edge VOL(2) VCCI is the supply pin associated with the input port. VOH and VOL are typical output voltage levels that occur with specified RL, CL, and S1 Figure 7-3. Input Transition Rise or Fall Rate Figure 7-2. Propagation Delay Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: SN74AXC2T45 17 SN74AXC2T45 www.ti.com SCES880C – AUGUST 2019 – REVISED JUNE 2021 VCCA DIR VCCA / 2 VCCA / 2 GND ten(1) Output A (2) VCCO(5) VCCO / 2 VOL + VTP VOL(6) tdis VOH(6) Output A VOH - VTP (3) VCCO / 2 GND ten(1) Output B(2) VCCO(5) VCCO / 2 VOL + VTP VOL(6) tdis VOH(6) Output B (3) VCCO / 2 VOH - VTP GND A. Illustrative purposes only. Enable Time is a calculation as described in the Application Information section. B. C. D. E. F. Output waveform on the condition that input is driven to a valid Logic Low. Output waveform on the condition that input is driven to a valid Logic High. VCCI is the supply pin associated with the input port. VCCO is the supply pin associated with the output port. VOH and VOL are typical output voltage levels with specified RL, CL, and S1. Figure 7-4. Enable Time And Disable Time 18 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Product Folder Links: SN74AXC2T45 SN74AXC2T45 www.ti.com SCES880C – AUGUST 2019 – REVISED JUNE 2021 8 Detailed Description 8.1 Overview The SN74AXC2T45 is a 2-bit, dual-supply non-inverting bidirectional voltage level translation device. Ax pins and the DIR pin are referenced to VCCA logic levels, and Bx pins are referenced to VCCB logic levels. The A port is able to accept I/O voltages ranging from 0.65 V to 3.6 V, while the B port can accept I/O voltages from 0.65 V to 3.6 V. A high on DIR enables data transmission from A to B and a low on DIR enables data transmission from B to A. See Device Functional Modes for a summary of the operation of the control logic. 8.2 Functional Block Diagram VCCA VCCB DIR A1 B1 A2 B2 8.3 Feature Description 8.3.1 Standard CMOS Inputs Standard CMOS inputs are high impedance and are typically modeled as a resistor in parallel with the input capacitance given in Section 6.5. The worst case resistance is calculated with the maximum input voltage, given in Section 6.1, and the maximum input leakage current, given in the Section 6.5, using Ohm's law (R = V ÷ I). Signals applied to the inputs need to have fast edge rates, as defined by Δt/Δv in Section 6.3 to avoid excessive current consumption and oscillations. If a slow or noisy input signal is required, a device with a Schmitt-trigger input should be used to condition the input signal prior to the standard CMOS input. 8.3.2 Balanced High-Drive CMOS Push-Pull Outputs A balanced output allows the device to sink and source similar currents. The high drive capability of this device creates fast edges into light loads so routing and load conditions should be considered to prevent ringing. Additionally, the outputs of this device are capable of driving larger currents than the device can sustain without being damaged. The electrical and thermal limits defined in Section 6.1 must be followed at all times. 8.3.3 Partial Power Down (Ioff) The inputs and outputs for this device enter a high-impedance state when the device is powered down, inhibiting current backflow into the device. The maximum leakage into or out of any input or output pin on the device is specified by Ioff in Section 6.5. 8.3.4 VCC Isolation The inputs and outputs for this device enter a high-impedance state when either supply is