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74LVC8T245BQ Scheda tecnica(PDF) 1 Page - NXP Semiconductors

Il numero della parte 74LVC8T245BQ
Spiegazioni elettronici  8-bit dual supply translating transceiver; 3-state
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Produttore elettronici  NXP [NXP Semiconductors]
Homepage  http://www.nxp.com
Logo NXP - NXP Semiconductors

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1.
General description
The 74LVC8T245; 74LVCH8T245 are 8-bit dual supply translating transceivers with
3-state outputs that enable bidirectional level translation. They feature two data
input-output ports (pins An and Bn), a direction control input (DIR), an 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 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 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 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 74LVCH8T245 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
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
MM JESD22-A115-B exceeds 200 V
CDM JESD22-C101E exceeds 1000 V
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)
74LVC8T245; 74LVCH8T245
8-bit dual supply translating transceiver; 3-state
Rev. 3 — 12 December 2011
Product data sheet


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