SN74HCT623

Name: SN74HCT623
Brand: TI
SKU: SN74HCT623
Price: 3.026 USD

アクティブ

3 ステート出力、オクタル・バス・トランシーバ

ご注文はこちら

データシート

document-pdfAcrobat SN54HCT623, SN74HCT623 データシート (Rev. C) (英語)

SN74HCT623

アクティブ

データシート

ご注文はこちら

製品詳細

Supply voltage (min) (V)

4.5

Supply voltage (max) (V)

5.5

Number of channels

8

IOL (max) (mA)

6

IOH (max) (mA)

-6

Input type

TTL

Output type

CMOS

Features

Balanced outputs, High speed (tpd 10-50ns), Positive input clamp diode

Technology family

HCT

Rating

Catalog

Operating temperature range (°C)

-40 to 85

Supply voltage (min) (V)

4.5

Supply voltage (max) (V)

5.5

Number of channels

8

IOL (max) (mA)

6

IOH (max) (mA)

-6

Input type

TTL

Output type

CMOS

Features

Balanced outputs, High speed (tpd 10-50ns), Positive input clamp diode

Technology family

HCT

Rating

Catalog

Operating temperature range (°C)

-40 to 85

PDIP (N)

20

228.702 mm² 24.33 x 9.4

Operating Voltage Range of 4.5 V to 5.5 V
Low Power Consumption, 80-µA Max I_CC
Typical t_pd = 11 ns
±6-mA Output Drive at 5 V
Low Input Current of 1 µA Max
Inputs Are TTL-Voltage Compatible
Lock Bus-Latch Capability
True Logic
High-Current 3-State Outputs Can Drive Up To 15 LSTTL Loads

Operating Voltage Range of 4.5 V to 5.5 V
Low Power Consumption, 80-µA Max I_CC
Typical t_pd = 11 ns
±6-mA Output Drive at 5 V
Low Input Current of 1 µA Max
Inputs Are TTL-Voltage Compatible
Lock Bus-Latch Capability
True Logic
High-Current 3-State Outputs Can Drive Up To 15 LSTTL Loads

These octal bus transceivers are designed for asynchronous two-way communication between data buses. The control-function implementation allows for maximum flexibility in timing.

The ’HCT623 devices allow data transmission from the A bus to the B bus or from the B bus to the A bus, depending upon the logic levels at the output-enable (OEAB and OEBA\) inputs.

The output-enable inputs disable the device so that the buses are effectively isolated. The dual-enable configuration gives the transceivers the capability to store data by simultaneously enabling OEAB and OEBA\. Each output reinforces its input in this transceiver configuration. When both OEAB and OEBA\ are enabled and all other data sources to the two sets of bus lines are in the high-impedance state, both sets of bus lines (16 total) remain at their last states. The 8-bit codes appearing on the two sets of buses are identical.

To ensure the high-impedance state during power up or power down, OEBA\ should be tied to V_CC through a pullup resistor and OEAB should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sinking/current-sourcing capability of the driver.

These octal bus transceivers are designed for asynchronous two-way communication between data buses. The control-function implementation allows for maximum flexibility in timing.

The ’HCT623 devices allow data transmission from the A bus to the B bus or from the B bus to the A bus, depending upon the logic levels at the output-enable (OEAB and OEBA\) inputs.

The output-enable inputs disable the device so that the buses are effectively isolated. The dual-enable configuration gives the transceivers the capability to store data by simultaneously enabling OEAB and OEBA\. Each output reinforces its input in this transceiver configuration. When both OEAB and OEBA\ are enabled and all other data sources to the two sets of bus lines are in the high-impedance state, both sets of bus lines (16 total) remain at their last states. The 8-bit codes appearing on the two sets of buses are identical.

To ensure the high-impedance state during power up or power down, OEBA\ should be tied to V_CC through a pullup resistor and OEAB should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sinking/current-sourcing capability of the driver.

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