SN74LVC4245A Texas Instruments TI pdf datasheet download

SN74LVC4245A
OCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER
WITH 3-STATE OUTPUTS

FEATURES

Bidirectional Voltage Translator
· 5.5 V on A Port and 2.7 V to 3.6 V on B Port
· Control Inputs VIH/VIL Levels Are Referenced
to VCCA Voltage
· Latch-Up Performance Exceeds 250 mA Per
JESD 17
· ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)

DESCRIPTION/ORDERING INFORMATION

This 8-bit (octal) noninverting bus transceiver
contains two separate supply rails; B port has VCCB,
which is set at 3.3 V, and A port has VCCA, which is
set at 5 V. This allows for translation from a 3.3-V to
a 5-V environment, and vice versa.
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The SN74LVC4245A is designed for asynchronous communication between data buses. The device transmits
data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the
direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so the buses are
effectively isolated. The control circuitry (DIR, OE) is powered by VCCA.
The SN74LVC4245A pinout allows the designer to switch to a normal all-3.3-V or all-5-V 20-pin '245 device
without board re-layout. The designer uses the data paths for pins 2–11 and 14–23 of the SN74LVC4245A to
align with the conventional '245 pinout.

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