74LVCH245A：Standard Logic _ BDTIC a Leading Distributor in China

74LVCH245A：Standard Logic

Part Number	Data Sheet	SPICE Model	Number of Gates	Family	VCC Min (V)	VCC Max (V)	tpd max @ (1.5V) (ns)	tpd max @ (1.8V) (ns)	tpd max @ (2.5V) (ns)	tpd max @ (3.3V) (ns)	tpd max @ (5.0V) (ns)	Input/ Output Current
74LVCH245A	74LVCH245A.pdf	-	8	LVC	1.65	3.6	-	12.7	8.3	6.3	-	24

Description

The 74LVCH245A is an octal transceiver 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) pin can be used to disable the device so the buses effectively are isolated.

The device is designed for operation with a power supply range of OE 1.65V to 3.6V.

The inputs are tolerant to 5.5V allowing this device to be used in a mixed voltage environment. The device is fully specified for partial power down applications using I_OFF. The I_OFF circuitry disables the output preventing damaging current backflow when the device is powered down.

Bus hold circuitry holds unused or undriven inputs at a high or low logic state. The use of external pull-up or pull down resistors is not recommended.

Application

General Purpose Logic
Bus Driving
Power Down Signal Isolation
Wide Array of Products Such as:
- PCs, Notebooks, Netbooks, Ultrabooks
- Networking Computer Peripherals, Hard Drives, CD/DVD ROM
- TV, DVD, DVR, Set Top Box

Features

Supply Voltage Range from 1.65V to 3.6V
Sinks or Sources 24ma at V_CC = 3V
CMOS Low Power Consumption
I_OFF Supports Partial Power Down Operation
Inputs or Outputs Accept Up to 5.5V
Inputs Can Be Driven by 3.3V or 5V Allowing for Mixed Voltage Applications
Schmitt Trigger Action at All Inputs
Typical V_OLP (Quiet Output Ground Bounce) Less Than 0.8V with V_CC = 3.3V and T_A = +25°C
Typical V_OHV (Quiet Output dynamic VOH) Greater than 2.0V with V_CC = 3.3V and T_A = +25°C
ESD Protection Tested per JESD 22
- Exceeds 200-V Machine Model (A115)
- Exceeds 2000-V Human Body Model (A114)
- Exceeds 1000-V Charged Device Model (C101)
Latch-Up Exceeds 250mA per JESD 78, Class I
All devices are:
- Totally Lead-Free & Fully RoHS compliant
- Halogen and Antimony Free. “Green” Device