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Part Name(s) : 74LS298
Fairchild
Fairchild Semiconductor
Description : Quad 2-Port Register Multiplexer with Storage

General Description
The DM74LS298 is a Quad 2-Port Register. It is the logical equivalent of a Quad 2-input multiplexer followed by a Quad 4-bit edge-triggered Register. A Common Select input selects between two 4-bit input ports (data sources). The selected data is transferred to the output Register synchronous with the HIGH-to-LOW transition of the Clock input.

Features
■ Select from two data sources
■ Fully edge-triggered operation
■ Typical power dissipation of 65 mW

Description : Quad 2-Port Register Multiplexer with Storage

General Description
The DM74LS298 is a Quad 2-Port Register. It is the logical equivalent of a Quad 2-input multiplexer followed by a Quad 4-bit edge-triggered Register. A Common Select input selects between two 4-bit input ports (data sources). The selected data is transferred to the output Register synchronous with the HIGH-to-LOW transition of the Clock input.

Features
■ Select from two data sources
■ Fully edge-triggered operation
■ Typical power dissipation of 65 mW

Description : Quad 2-Port Register

The SN54/74LS398 and SN54/74LS399 are Quad 2-Port Registers. They are the logical equivalent of a Quad 2-input multiplexer followed by a Quad 4-bit edge-triggered Register. A Common Select input selects between two 4-bit input ports (data sources). The selected data is transferred to the output Register on the LOW-to-HIGH transition of the Clock input. The SN54/74LS398 features both Q and Q inputs, while the SN54/74LS399 has only Q outputs.

• Select From Two Data Sources
• Fully Positive Edge-Triggered Operation
• Both True and Complemented Outputs on SN54/74LS398
• Input Clamp Diodes Limit High-Speed Termination Effects

Part Name(s) : 74AC399CW 74ACT399CW
Fairchild
Fairchild Semiconductor
Description : Quad 2-Port Register

General Description
The AC/ACT399 is the logical equivalent of a Quad 2-input multiplexer feeding into four edge-triggered flip-flops. A common Select input determines which of the two 4-bit words is accepted. The selected data enters the flip-flop on the rising edge of the clock.

Features
■ ICC reduced by 50%
■ Select inputs from two data sources
■ Fully positive edge-triggered operation
■ Outputs source/sink 24 mA
■ AC/ACT399 has TTL-compatible inputs

Motorola
Motorola => Freescale
Description : Quad 2-Port Register

The MC54/74F398 is the logical equivalent of a Quad 2-input multiplexer feeding into four edge-triggered flip-flops. A common Select input determines which of the two 4-bit words is accepted. The selected data enters the flip-flops on the rising edge of the clock.

• Select Inputs from Two Data Sources
• Fully Positive Edge-Triggered Operation
• Both True and Complement Outputs

Motorola
Motorola => Freescale
Description : Quad 2-Port Register

The MC54/74F399 is the logical equivalent of a Quad 2-input multiplexer feeding into four edge-triggered flip flops. A common Select input determines which of the two 4-bit words is accepted. The selected data enters the flip-flops on the rising edge of the clock. The MC54/74F399 is the 16-pin version of the MC54/74F398, with only the Q outputs of the flip-flops available.

• Select Inputs from Two Data Sources
• Fully Positive Edge-Triggered Operation

Description : Quad 2-Port Register

General Description
The 74F398 and 74F399 are the logical equivalents of a Quad 2-input multiplexer feeding into four edge-triggered flip-flops. A common Select input determines which of the two 4-bit words is accepted. The selected data enters the flip-flops on the rising edge of the clock. The 74F399 is the 16-pin version of the 74F398, with only the Q outputs of the flip-flops available.

Features
■ Select inputs from two data sources
■ Fully positive edge-triggered operation
■ Both true and complement outputs—74F398

Part Name(s) : 74LS298
ON-Semiconductor
ON Semiconductor
Description : Quad 2-Input Multiplexer with Storage

Quad 2-Input Multiplexer with Storage

The SN74LS298 is a Quad 2-Port Register. It is the logical equivalent of a Quad 2-input multiplexer followed by a Quad 4-bit edge-triggered Register. A Common Select input selects between two 4-bit input ports (data sources.) The selected data is transferred to the output Register synchronous with the HIGH to LOW transition of the Clock input.
The LS298 is fabricated with the Schottky barrier process for high speed and is completely compatible with all ON Semiconductor TTL families.

• Select From Two Data Sources
• Fully Edge-Triggered Operation
• Typical Power Dissipation of 65 mW
• Input Clamp Diodes Limit High Speed Termination Effects

Part Name(s) : 74LS298
Motorola
Motorola => Freescale
Description : Quad 2-INPUT MULTIPLEXER WITH STORAGE

Quad 2-INPUT MULTIPLEXER WITH STORAGE

The SN54/74LS298 is a Quad 2-Port Register. It is the logical equivalent of a Quad 2-input multiplexer followed by a Quad 4-bit edge-triggered Register. A Common Select input selects between two 4-bit input ports (data sources.) The selected data is transferred to the output Register synchronous with the HIGH to LOW transition of the Clock input.
The LS298 is fabricated with the Schottky barrier process for high speed and is completely compatible with all Motorola TTL families.

• Select From Two Data Sources
• Fully Edge-Triggered Operation
• Typical Power Dissipation of 65 mW
• Input Clamp Diodes Limit High Speed Termination Effects

Description : Quad 2-Input Multiplexer with Storage

 
Quad 2-Input Multiplexer with Storage

The SN74LS298 is a Quad 2-Port Register. It is the logical equivalent of a Quad 2-input multiplexer followed by a Quad 4-bit edge-triggered Register. A Common Select input selects between two
4-bit input ports (data sources.) The selected data is transferred to the output Register synchronous with the HIGH to LOW transition of the Clock input.
The LS298 is fabricated with the Schottky barrier process for high speed and is completely compatible with all ON Semiconductor TTL families.

• Select From Two Data Sources
• Fully Edge-Triggered Operation
• Typical Power Dissipation of 65 mW
• Input Clamp Diodes Limit High Speed Termination Effects

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