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NXP Semiconductors - 8-bit dual supply translating transceiver

Numéro de référence 74AVCH8T245
Description 8-bit dual supply translating transceiver
Fabricant NXP Semiconductors 
Logo NXP Semiconductors 





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74AVCH8T245 fiche technique
74AVCH8T245
8-bit dual supply translating transceiver with configurable
voltage translation; 3-state
Rev. 5 — 27 December 2012
Product data sheet
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)

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