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NTE74LS173A IC-TTL Quad Register

Model:

NTE74LS173A

 | Catalog #: 55051082
Price:
$1.13
$1.13
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  • Separate read/write addressing permits simultaneous reading and writing
  • Fast access time: 20ns (Typ)
  • Organized as 4 words of 4-bits
  • Expandable to 1024 words of n−bits

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  • Low-power dissipation: 100mW (Typ)
  • High−speed count frequency: 30MHz (Typ)
  • Fully synchronous operation
  • Full carry look ahead for easy cascading
  • Single up/down control input
  • Positive-edge trigger operation
  • Input clamp diodes limit high−speed termination effects
  • Absolute maximum ratings:
    VCC: 7V
  • VIN: 7V
  • TA: 0°C to +70°C
  • Tstg: −65°C to +150°C
  • Unless otherwise specified, all voltages are referenced to GND

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  • Low-power dissipation: 100mW (Typ)
  • High−speed count frequency: 30MHz (Typ)
  • Fully synchronous operation
  • Full carry look ahead for easy cascading
  • Single up/down control input
  • Positive-edge trigger operation
  • Input clamp diodes limit high−speed termination effects
  • Absolute maximum ratings:
    VCC: 7V
  • VIN: 7V
  • TA: 0°C to +70°C
  • Tstg: −65°C to +150°C
  • Unless otherwise specified, all voltages are referenced to GND

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  • Synchronous load
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  • Absolute maximum ratings:
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  • DC input voltage, VIN: 7V
  • Power dissipation, PD: 100mW
  • Operating temperature range, TA: 0°C to +70°C
  • Storage temperature range, Tstg: −65°C to +150°C
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  • Complementary outputs
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  • Absolute maximum ratings:
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  • VIN: 7V
  • PD: 10mW
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  • Tstg: −65°C to +150°C
  • Unless otherwise specified, all voltages are referenced to GND

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  • Gated serial inputs
  • Fully buffered clock and serial inputs
  • Asynchronous clear
  • Absolute maximum ratings:
    VCC: 7V
  • VIN: 7V
  • Per bit PD: 10mW
  • TA: 0°C to +70°C
  • Tstg: −65°C to +150°C
  • Unless otherwise specified, all voltages are referenced to GND

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Availability:

ONLINE In stock
Usually ships in 1 - 2 business days


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Product Summary

The NTE74LS173A is a 4−bit register in a 16−Lead plastic DIP-type package that includes D−type flip−flops featuring totem pole three−state outputs capable of driving highly capacitive or relatively low−impedance loads. The high−impedance third state and increased high-logic level drive provide these flip−flops with the capability of being connected directly to and driving the bus lines in a bus−organized system without need for interface or pull−up components. Up to 128 of the NTE74LS173A outputs may be connected to a common bus and still drive two LS−TTL normalized loads. To minimize the possibility that two outputs will attempt to take a common bus to opposite logic levels, the output control circuitry is designed so that the average output disable times are shorter than the average output enable times.

Gated enable inputs are provided for controlling the entry of data into the flip−flops. When both data−enable inputs are low, data at the D inputs are loaded into their respective flip−flops on the next positive transition of the buffered clock input. Gate output control inputs are also provided. When both are low, the normal logic states (high or low levels) of the four outputs are available for driving the loads or bus lines. The outputs are disabled independently from the level of the clock by a high-logic level at either output control input. The outputs then present a high impedance and neither load nor drive the bus line. Detailed operation is given in the function table.

  • 3−state outputs interface directly with system bus
  • Gated output−control lines for enabling or disabling the outputs
  • Independent clock virtually eliminates restrictions for operating in Parallel load or Hold
  • For applications as a bus buffer register
Pricing and availability: Please note that all prices are subject to change without prior notice. Prices advertised on this site are for online orders only. Prices on some items may differ from those advertised in RadioShack stores. All merchandise may not be available at all stores, and all stores may not participate in all sales promotions. We recommend you contact the store to confirm product availability and price.

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