74LVCH245A Datasheet, PDF (1/10 Pages) Diodes Incorporated – OCTAL BUS TRANSCEIVER WITH BUS HOLD / 3 STATE OUTPUTS

74LVCH245A
OCTAL BUS TRANSCEIVER WITH BUS HOLD / 3 STATE OUTPUTS
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
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.
Pin Assignments
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.
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
ƒ Exceeds 200-V Machine Model (A115)
ƒ Exceeds 2000-V Human Body Model (A114)
ƒ Exceeds 1000-V Charged Device Model (C101)
• Latch-Up Exceeds 250mA per JESD 78, Class I
• All devices are:
ƒ Totally Lead-Free & Fully RoHS compliant (Notes 1 & 2)
ƒ Halogen and Antimony Free. “Green” Device (Note 3)
Applications
• General Purpose Logic
• Bus Driving
• Power Down Signal Isolation
• Wide array of products such as:
ƒ PCs, Notebooks, Netbooks, Ultrabooks
ƒ Networking Computer Peripherals, Hard Drives, CD/DVD
ROM
ƒ TV, DVD, DVR, Set Top Box
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen and Antimony free,
"Green" and Lead-Free.
3. Halogen and Antimony free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
74LVCH245A
Document number: DS35891 Rev. 1 - 2
1 of 10
www.diodes.com
July 2014
© Diodes Incorporated