|
74AVCH8T245 Datasheet, PDF (1/24 Pages) NXP Semiconductors – 8-bit dual supply translating transceiver with configurable voltage translation; 3-state | |||
|
74AVCH8T245
8-bit dual supply translating transceiver with conï¬gurable
voltage translation; 3-state
Rev. 02 â 28 April 2009
Product data sheet
1. General description
The 74AVCH8T245 is an 8-bit, dual supply transceiver that enables bidirectional level
translation. It features two data 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 B to A. The output enable input (OE) can be used to disable
the outputs so the buses are effectively isolated.
The device is fully speciï¬ed for partial power-down applications using IOFF. The IOFF
circuitry disables the output, preventing any damaging backï¬ow 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 and B 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
ï¬oating data inputs at a valid logic level. This feature eliminates the need for external
pull-up or pull-down resistors.
2. Features
I Wide supply voltage range:
N VCC(A): 0.8 V to 3.6 V
N VCC(B): 0.8 V to 3.6 V
I Complies with JEDEC standards:
N JESD8-12 (0.8 V to 1.3 V)
N JESD8-11 (0.9 V to 1.65 V)
N JESD8-7 (1.2 V to 1.95 V)
N JESD8-5 (1.8 V to 2.7 V)
N JESD8-B (2.7 V to 3.6 V)
I ESD protection:
N HBM JESD22-A114E Class 3B exceeds 8000 V
N MM JESD22-A115-A exceeds 200 V
N CDM JESD22-C101C exceeds 1000 V
I Maximum data rates:
N 380 Mbit/s (⥠1.8 V to 3.3 V translation)
N 260 Mbit/s (⥠1.1 V to 3.3 V translation)
|
▷ |