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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

Description : Quad Port T1/E1

[FILTRAN]



T1/CEPT(Quad Port T1/E1)



•  Eight transformers in a SMD package supporting four transmit and four receive channels

•  Units matched to leading dual and Quad T1/E1/CEPT/ISDN-PRI IC’s Quad Port T1/E1 8150-


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

Philips
Philips Electronics
Description : Quad 2-Port Register

DESCRIPTION
The 74F398 and 74F399 are the logical equivalent of a Quad 2-input multiplexer feeding into four edge-triggered flip-flops. A common Select input determines which of two 4-bit words is accepted. The selected data enters the flip-flops on the rising edge of the clock.

FEATURES
• Select inputs from two data sources
• Fully positive edge-triggered
• Both True and Complementary outputs–74F398

Description : Quad Parallel Register with Enable

Quad Parallel Register with Enable

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

Part Name(s) : XF00137-32S
XFMRS
XFMRS Inc.
Description : T1/E1/CEPT Quad PORT

T1/E1/CEPT Quad PORT

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

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