1. General description

The 74LVC1T45; 74LVCH1T45 are single bit, dual supply transceivers with 3-state outputs

that enable bidirectional level translation. They feature two 1-bit input-output ports (A and B), a

direction control input (DIR) and dual supply pins (VCC(A) and VCC(B)). Both VCC(A) and VCC(B) can

be supplied at any voltage between 1.2 V and 5.5 V making the device suitable for translating

between any of the low voltage nodes (1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V and 5.0 V). Pins A and DIR

are referenced to VCC(A) and pin B is referenced to VCC(B). A HIGH on DIR allows transmission

from A to B and a LOW on DIR allows transmission from B to A.

The devices are fully specified for partial power-down applications using IOFF. The IOFF

circuitry disables the output, preventing any damaging backflow current through the device

when it is powered down. In suspend mode when either VCC(A) or VCC(B) are at GND level,

both A port and B port are in the high-impedance OFF-state.

Active bus hold circuitry in the 74LVCH1T45 holds unused or floating data inputs at a valid logic

level.

2. Features and benefits

? Wide supply voltage range:

? VCC(A): 1.2 V to 5.5 V

? VCC(B): 1.2 V to 5.5 V

? High noise immunity

? Maximum data rates:

? 420 Mbps (3.3 V to 5.0 V translation)

? 210 Mbps (translate to 3.3 V))

? 140 Mbps (translate to 2.5 V)

? 75 Mbps (translate to 1.8 V)

? 60 Mbps (translate to 1.5 V)

? Suspend mode

? Latch-up performance exceeds 100 mA per JESD 78 Class II

? ±24 mA output drive (VCC = 3.0 V)

? Inputs accept voltages up to 5.5 V

? Low power consumption: 16 μA maximum ICC

? IOFF circuitry provides partial Power-down mode operation

? Complies with JEDEC standards:

? JESD8-7 (1.2 V to 1.95 V)

? JESD8-5 (1.8 V to 2.7 V)

? JESD8C (2.7 V to 3.6 V)

? JESD36 (4.5 V to 5.5 V)

? ESD protection:

? HBM JESD22-A114F Class 3A exceeds 4000 V

? CDM JESD22-C101E exceeds 1000 V

? Multiple package options

? Specified from -40 °C to +85 °C and -40 °C to +125 °C

74LVCH1T45GS屬于集成電路（IC） > 轉(zhuǎn)換器，電平移位器。安世半導體(中國)有限公司制造生產(chǎn)的74LVCH1T45GS轉(zhuǎn)換器，電平移位器邏輯轉(zhuǎn)換器或電平移位器 IC 可用于在數(shù)字邏輯設(shè)備之間傳遞信息，這些設(shè)備可在不同/不兼容的供電電壓下工作，或可實現(xiàn)不同的信令方式。例如，可以將需要 5 V 電源的數(shù)字輸出傳感器連接到具有 3.3 V I/O 電源的 FPGA，或者在 CMOS 或 TTL 等單端信令方式與 PECL 或 LVDS 等差分技術(shù)之間進行轉(zhuǎn)換。