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Features: Inputs Are TTL-Voltage Compatible True Logic High-Current 3-State Outputs Can Drive up to 15 LSTTL Loads Package Options Include Plastic Small-Outline (DW) and Ceramic Flat (W) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPsPinoutSpecifica...

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SeekIC No. : 004496945 Detail

SN54HCT645: Features: Inputs Are TTL-Voltage Compatible True Logic High-Current 3-State Outputs Can Drive up to 15 LSTTL Loads Package Options Include Plastic Small-Outline (DW) and Ceramic Flat (W) Packag...

SN54HCT645 Data Sheet

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Part Number:: SN54HCT645
Supply Ability:: 5000

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Upload time: 2025/12/24

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Product Details

Description

Features:

Inputs Are TTL-Voltage Compatible
True Logic
High-Current 3-State Outputs Can Drive up to 15 LSTTL Loads
Package Options Include Plastic Small-Outline (DW) and Ceramic Flat (W) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs

Pinout

Connection Diagram

Specifications

Supply voltage range, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V
Input clamp current, I_IK (V_I < 0 or V_I> V_CC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . .±20 mA
Output clamp current, I_OK (V_O < 0 or V_O > V_CC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . ..±20 mA
Continuous output current, I_O(V_O= 0 to V_CC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .±35 mA
Continuous current through V_CC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±70 mA
Package thermal impedance, _JA (see Note 2): DW package . . . . . . . . . . . . . . . . . . . . . . . .97°C/W
N package . . . . . . . . . . . . . . . . . . . . . . . . . . 67°C/W
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .65°C to 150°C
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace length of zero.

Description

These octal bus transceivers SN54HCT645 are designed for asynchronous two-way communication between data buses. These devices transmit data from the A bus to the B bus or from the B bus to the A bus, depending upon the level at the direction-control (DIR) input. The output-enable (OE) input of SN54HCT645 can be used to disable the device so the buses are effectively isolated.

The SN54HCT645 is characterized for operation over the full military temperature range of 55°C to 125°C. The SN74HCT645 is characterized for operation from 40°C to 85°C.

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SN54HCT645

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