Datasheet 74LVCH2T45 (Diodes)

74LVCH2T45 DUAL BIT DUAL POWER SUPPLY TRANSLATING TRANSCEIVER WITH 3 STATE OUTPUTS Description Pin Assignments
The 74LVCH2T45 is a dual-bit, dual-supply transceiver with tri-state outputs suitable for transmitting two logic bits across different voltage (Top View ) domains. The direction pin (DIR) and Port A, consisting of pins 1A and 2A, have logic levels in relation to VCC(A) while port B, consisting of pins 1B and 2B have logic levels related to VCC(B). This arrangement VCC(A) 1 8 VCC(B) allows for universal low-voltage translation between any voltages from 1.2V to 5.5V. When a HIGH logic level is applied to the direction pin, port A pins become inputs and port B pins are outputs. Conversely, 1A 2 7 1B the roles of the ports are reversed when the direction pin is asserted LOW. The tri-state (Ioff) feature places all port pins in a high impedance 2A 3 6 2B state when either power supply is at 0V, which prevents and damages backflow currents and provides power-down electrical isolation up to 5.5V as not to interfere with any logic activity on either of the ports. GND 4 5 DIR The 74LVCH2T45 is a variant of the 74LVC2T45 that includes a bus hold feature at each input. The bus hold feature maintains the previous logic level therefore a valid logic level is always present X2-DFN1210-8 eliminating the need for additional resistors for unused or X2-DFN1410-8 disconnected inputs.
Features Applications
Wide Supply Voltage Range: Voltage Level Translation  VCC(A): from 1.2V to 5.5V Well-Suited to Join Logic Types Operating at Different Voltages  VCC(B): from 1.2V to 5.5V Power-Down Signal Isolation ± 24mA Output Drive at 3.3V If Either Voltage Domain is Turned Off the Signal is Isolated and CMOS Low Power Consumption 16µA Maximum ICC There is No Loading on Signal Lines High Noise Immunity Wide Array of Products, such as: IOFF Supports Partial-Power-Down Mode Operation  Cell Phones, Tablets, E-Readers IOFF Controlled by Either VCC Being at 0V  PCs, Notebooks, Netbooks, Ultrabooks Inputs Accept up to 5.5V  Networking, Routers, Gateways Maximum data rates:  Computer Peripherals, Hard Drives, CD/DVD ROM 420Mbps (3.3V to 5V translation)  TV, DVD, DVR, Set-Top Box 210Mbps (translate to 3.3V)  Personal Navigation / GPS 140Mbps (translate to 2.5V)  MP3 Players, Cameras, Video Recorders 75Mbps (translate to 1.8V) 60Mbps (translate to 1.5V) ESD Protection Exceeds JESD 22  4000-V Human Body Model (A114)  1000 V Charged Device Model (C101) Latch-up Exceeds 100mA per JESD 78, Class I Specified from -40°C to +85°C and -40°C to +125°C
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. 74LVCH2T45 1 of 16 January 2021 Document number: DS43361 Rev. 1 - 2
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