SN74LV245AT Texas instruments

SN74LV245AT

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SN74LV245AT

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Описание

This octal bus transceiver is designed for asynchronous two-way communication between data buses. The control-function implementation minimizes external timing requirements. The SN74LV245AT allows data transmission 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 that the buses are effectively isolated. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

Inputs Are TTL-Voltage Compatible
4.5-V to 5.5-V V_CC Operation
Typical t_pd of 3.5 ns at 5 V
Typical V_OLP (Output Ground Bounce) <0.8 V
at V_CC = 5 V, T_A = 25°C
Typical V_OHV (Output V_OH Undershoot) >2.3 V
at V_CC = 5 V, T_A = 25°C
Supports Mixed-Mode Voltage Operation on All Ports
I_off Supports Partial-Power-Down Mode Operation
Latch-Up Performance Exceeds 250 mA Per JESD 17
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 1000-V Charged-Device Model (C101)

Supply voltage (min) (V)	4.5
Supply voltage (max) (V)	5.5
Number of channels	8
IOL (max) (mA)	16
IOH (max) (mA)	-16
Input type	TTL
Output type	CMOS
Features	Balanced outputs
Technology family	LV-AT
Rating	Catalog
Operating temperature range (°C)	-40 to 125, -40 to 85