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CD74HCT259

Features: • Buffered Inputs and Outputs• Four Operating Modes• Typical Propagation Delay of 15ns at VCC = 5V, CL = 15pF, TA = 25oC• Fanout (Over Temperature Range)- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads- Bus Driver Outputs . . . . . . . . . . . . . 1...

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SeekIC No. : 004312134 Detail

CD74HCT259: Features: • Buffered Inputs and Outputs• Four Operating Modes• Typical Propagation Delay of 15ns at VCC = 5V, CL = 15pF, TA = 25oC• Fanout (Over Temperature Range)- Standard ...

CD74HCT259 Data Sheet

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Part Number:
CD74HCT259
Supply Ability:
5000

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Product Details

Description



Features:

• Buffered Inputs and Outputs
• Four Operating Modes
• Typical Propagation Delay of 15ns at VCC = 5V, CL = 15pF, TA = 25oC
• Fanout (Over Temperature Range)
- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating Temperature Range . . . -55oC to 125oC
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL Logic ICs
• HC Types
- 2V to 6V Operation
- High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
VIL= 0.8V (Max), VIH = 2V (Min)
- CMOS Input Compatibility, Il 1A at VOL, VOH


Pinout

Connection Diagram


Specifications

DC Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 7V
DC Input Diode Current, IIK
For VI < -0.5V or VI > VCC + 0.5V . . . . . . . . . . . . . . . . . . . . . .±20mA
DC Output Diode Current, IOK
For VO < -0.5V or VO > VCC + 0.5V . . . . . . . . . . . . . . . . . . . .±20mA
DC Drain Current, per Output, IO
For -0.5V < VO < VCC + 0.5V. . . . . . . . . . . . . . . . . . . . . . . . . .±25mA
DC Output Source or Sink Current per Output Pin, IO
For VO > -0.5V or VO < VCC + 0.5V . . . . . . . . . . . . . . . . . . . .±25mA
DC VCC or Ground Current, ICC or IGND . . . . . . . . . . . . . . . . . .±50mA


Description

The 'HC259 and 'HCT259 Addressable Latch features the low-power consumption associated with CMOS circuitry and has speeds comparable to low-power Schottky.

CD74HCT259 latches three active modes and one reset mode. When both the Latch Enable (LE) and Master Reset (MR) inputs are low (8-line Demultiplexer mode) the output of the addressed latch follows the Data input and all other outputs are forced low. When both MR and LE are high (Memory Mode), all CD74HCT259 outputs are isolated from the Data input, i.e., all latches hold the last data presented before the LE transition from low to high. A condition of LE low and MR high (Addressable Latch mode) allows the addressed latch's output to follow the data input; all other latches are unaffected. The Reset mode (all outputs low) results when LE is high and MR is low.




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