74AVCH8T245集成電路（IC）的緩沖器驅(qū)動(dòng)器接收器收發(fā)器規(guī)格書PDF中文資料

1. General description

The 74AVCH8T245 is an 8-bit, dual supply transceiver that enables bidirectional level

translation. It features two 8-bit input-output ports (An and Bn), a direction control input

(DIR), a output enable input (OE) and dual supply pins (VCC(A) and VCC(B)). Both VCC(A)

and VCC(B) can be supplied at any voltage between 0.8 V and 3.6 V making the device

suitable for translating between any of the low voltage nodes (0.8 V, 1.2 V, 1.5 V, 1.8 V,

2.5 V and 3.3 V). Pins An, OE and DIR are referenced to VCC(A) and pins Bn are

referenced to VCC(B). A HIGH on DIR allows transmission from An to Bn and a LOW on

DIR allows transmission from Bn to An. The output enable input (OE) can be used to

disable the outputs so the buses are effectively isolated.

The device is 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 An and Bn outputs are in the high-impedance OFF-state. The bus-hold

circuitry on the powered-up side always stays active.

The 74AVCH8T245 has active bus hold circuitry which is provided to hold unused or

floating data inputs at a valid logic level. This feature eliminates the need for external

pull-up or pull-down resistors.

2. Features and benefits

? Wide supply voltage range:

? VCC(A): 0.8 V to 3.6 V

? VCC(B): 0.8 V to 3.6 V

? Complies with JEDEC standards:

? JESD8-12 (0.8 V to 1.3 V)

? JESD8-11 (0.9 V to 1.65 V)

? JESD8-7 (1.2 V to 1.95 V)

? JESD8-5 (1.8 V to 2.7 V)

? JESD8-B (2.7 V to 3.6 V)

? ESD protection:

? HBM JESD22-A114E Class 3B exceeds 8000 V

? MM JESD22-A115-A exceeds 200 V

? CDM JESD22-C101C exceeds 1000 V

? Maximum data rates:

? 380 Mbit/s (? 1.8 V to 3.3 V translation)

? 260 Mbit/s (? 1.1 V to 3.3 V translation)

? 260 Mbit/s (? 1.1 V to 2.5 V translation)

? 210 Mbit/s (? 1.1 V to 1.8 V translation)

? 150 Mbit/s (? 1.1 V to 1.5 V translation)

? 100 Mbit/s (? 1.1 V to 1.2 V translation)

? Suspend mode

? Bus hold on data inputs

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

? Inputs accept voltages up to 3.6 V

? IOFF circuitry provides partial Power-down mode operation

? Multiple package options

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