74AVCH1T45 SINGLE BIT DUAL POWER SUPPLY TRANSLATING TRANSCEIVER WITH 3 STATE OUTPUTS Description Pin Assignments The 74AVCH1T45 is a single bit, dual supply transceiver with 3-state (Top View) outputs suitable for transmitting a single logic bit across different voltage domains. The 74AVCH1T45 is a variant of the 74AVC1T45 that includes a bus hold feature at each input. The A input/output pin Vcc(A) 1 6 Vcc(B) is designed to track V while the B input/output tracks V . This CCA CCB GND 5 2 DIR arrangement allows for universal low-voltage translation between any (Top View) voltages from 1.2V to 3.6V. The Direction pin (DIR) controls the 3 4 A B Vcc(A) 6 Vcc(B) 1 direction of the transceiver and in a logic voltage related to V . CCA SOT26 When a high logic level is applied to DIR the A pin becomes an input GND 2 5 DIR SOT363 and the B pin becomes the output. Conversely the roles of A and B A 3 4 B are reversed when DIR is asserted low. ( Bottom View) X1-DFN1010-6 The 3-state feature occurs when either of the power supply voltages A 3 4 B X2-DFN0910-6 are zero. This is also an Ioff feature and allows for the output to X2-DFN1410-6 2 DIR GND 5 remain in a high impedance state with both power supplies at 0V preventing damaging backflow currents and providing power down Vcc(A) 1 6 Vcc(B) electrical isolation up to 3.6 V as not to interfere with any logic activity X2-DFN1409-6 on pin A or B. Chip Scale Alternative The bus hold feature maintains the previous logic level therefore a valid logic level is always present eliminating the need for additional resistors for an unused or disconnected inputs. Applications Features Voltage Level Translation: Wide Supply Voltage Range: Well suited to join logic types operating at different voltages V (A): from 1.2V to 3.6V CC Power Down Signal Isolation: V (B): from 1.2V to 3.6V CC If either voltage domain is turned off the signal is isolated and 12mA Output Drive at 3.3V there is no loading on signal lines High Noise Immunity - (100mV hysteresis typical) Wide array of products such as: I Supports Partial-Power-Down Mode Operation OFF Cell Phones, Tablets, E-Readers I controlled by either V being at 0V OFF CC PCs, Notebooks, Netbooks, Ultrabooks Inputs accept up to 4.6V Networking, Routers, Gateways ESD Protection Exceeds JESD 22 Computer Peripherals, Hard Drives, CD/DVD ROMs 200-V Machine Model (A115) TVs, DVDs, DVRs, Set Top Boxes 2000-V Human Body Model (A114) Personal Navigation / GPS 1000 V Charged Device Model ( C101) MP3 players, Cameras, Video Recorders Latch-Up Exceeds 100mA per JESD 78, Class I X2-DFN1409-6 package designed as a direct replacement for chip scale packaging. Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See 74AVCH1T45 Ordering Information 74 AVCH 1T 45 XXX -7 Logic Device Function Package Packing 74 : Logic Prefix : 7 : Tape & Reel W6 SOT26 : 1 Bit 45 : DW SOT363 AVCH: 1.2 to 3.6V Transceiver FW3 : X2-DFN0910-6 Family with with direction FW5 : X1-DFN1010-6 bus hold control FZ4 : X2-DFN1410-6 : 1T One gate : FX4 X2-DFN1409-6 With Voltage Translation 7 Tape and Reel (Note 7) Part Number Package Code Packaging Quantity Part Number Suffix 74AVCH1T45W6-7 W6 SOT26 3,000/Tape & Reel -7 74AVCH1T45DW-7 DW SOT363 3,000/Tape & Reel -7 74AVCH1T45FW3-7 FW3 X2-DFN0910-6 5,000/Tape & Reel -7 74AVCH1T45FW5-7 FW5 X1-DFN1010-6 5,000/Tape & Reel -7 74AVCH1T45FZ4-7 FZ4 X2-DFN1410-6 5,000/Tape & Reel -7 74AVCH1T45FX4-7 FX4 X2-DFN1409-6 5,000/Tape & Reel -7 Notes: 4. The taping orientation is located on our website at