MC74ACT646 Series

Octal Bus Transceiver/Register with 3-State Outputs (Non-inverting)

Catalog

Octal Bus Transceiver/Register with 3-State Outputs (Non-inverting)

Part	Supplier Device Package	Mounting Type	Current - Output High, Low	Package / Case	Package / Case	Package / Case	Number of Elements	Output Type	Operating Temperature [Max]	Operating Temperature [Min]	Number of Bits per Element	Voltage - Supply [Min]	Voltage - Supply [Max]	Package / Case [custom]	Package / Case [custom]
ON Semiconductor 74ACT646SPC	24-PDIP	Through Hole	24 mA	0.3 in	24-DIP	7.62 mm	1	3-State	85 °C	-40 °C	8	4.5 V	5.5 V
ON Semiconductor 74ACT646SCX	24-SOP	Surface Mount	24 mA		24-SOIC		1	3-State	85 °C	-40 °C	8	4.5 V	5.5 V	7.5 mm	0.295 in
ON Semiconductor MC74ACT646DWG	24-SOIC	Surface Mount	24 mA		24-SOIC		1	3-State	85 °C	-40 °C	8	4.5 V	5.5 V	7.5 mm	0.295 in
ON Semiconductor 74ACT646SC	24-SOP	Surface Mount	24 mA		24-SOIC		1	3-State	85 °C	-40 °C	8	4.5 V	5.5 V	7.5 mm	0.295 in

Catalog

Octal Bus Transceiver/Register with 3-State Outputs (Non-inverting)

Key Features

• Independent Registers for A and B Buses

• Multiplexed Real-Time and Stored Data Transfers

• Choice of True and Inverting Data Paths

• 3-State Outputs

• 300 mil Slim Dual In-Line Package

• Outputs Source/Sink 24 mA

• ACT646 Has TTL Compatible Inputs

• These devices are available in Pb-free package(s). Specifications herein apply to both standard and Pb-free devices. Please see our website at www.onsemi.com for specific Pb-free orderable part numbers, or contact your local ON Semiconductor sales office or representative.

Description

The MC74AC646/74ACT646 consist of registered bus transceiver circuits, with outputs, D-type flip-flops and control circuitry providing multiplexed transmission of data directly from the input bus or from the internal storage registers. Data on the A or B bus will be loaded into the respective registers on the LOW-to-HIGH transition of the appropriate clock pin (CAB or CBA). The four fundamental data handling functions available are illustrated in the following figures.