Datasheet
1. General description
The 74AVCH16T245 is a 16-bit transceiver with bidirectional level voltage translation and
3-state outputs.The device can be used as two 8-bit transceivers or as a 16-bit
transceiver. It has dual supplies (V
CC(A)
and V
CC(B)
) for voltage translation and four 8-bit
input-output ports (nAn, nBn) each with its own output enable (nOE
) and send/receive
(nDIR) input for direction control. V
CC(A)
and V
CC(B)
can be independently supplied at any
voltage between 0.8 V and 3.6 V making the device suitable for low voltage translation
between any of the following voltages: 0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V and 3.3 V. A HIGH
on nDIR selects transmission from nAn to nBn while a LOW on nDIR selects transmission
from nBn to nAn. A HIGH on nOE
causes the outputs to assume a high-impedance
OFF-state
The device is fully specified for partial power-down applications using I
OFF
. The I
OFF
circuitry disables the output, preventing any damaging backflow current through the
device when it is powered down. In suspend mode when either V
CC(A)
or V
CC(B)
are at
GND level, both A and B outputs are in the high-impedance OFF-state. The bus-hold
circuitry on the powered-up side always stays active.
The 74AVCH16T245 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:
V
CC(A)
: 0.8 V to 3.6 V
V
CC(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-A114F Class 3B exceeds 8000 V
MM JESD22-A115-A exceeds 200 V
CDM JESD22-C101D exceeds 1000 V
Maximum data rates:
380 Mbit/s ( 1.8 V to 3.3 V translation)
74AVCH16T245
16-bit dual supply translating transceiver with configurable
voltage translation; 3-state
Rev. 5 — 1 March 2012 Product data sheet