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NTE NTE74HCT161 IC High-Speed CMOS Counter

Model:

NTE74HCT161

 | Catalog #: 55051022
Price:
$1.43
$1.43
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  • TTL pinout compatible
  • Propagation delay: 20ns (typ)
  • Low quiescent current: 80μA (max)
  • Low input current: 1μA (max)
  • Fanout of 10 LS−TTL loads

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  • Propagation delay: 13ns (typ)
  • Wide power supply range: 4.5V to 5.5V
  • Low quiescent current: 10μA (max)
  • Low-input current: 1μA (max)
  • Fanout of 10 LS−TTL loads
  • Typical hysteresis voltage: 0.6V at VCC = 4.5V
  • TTL, LS pinout and input threshold compatible

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NTE74HCT163 High-Speed CMOS Counter
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  • Typical operating frequency: 40MHz
  • Typical propagation delay: Clock to Q: 18ns
  • Low quiescent current: 80μA (max)
  • Low input current: 1μA (max)
  • Wide power supply range: 2V to 6V
  • TTL input compatible inputs
  • Absolute Maximum Ratings:*
    Supply voltage, VCC: −0.5 to +7.0V
  • VIN: −1.5 to VCC +1.5V
  • VOUT: −0.5 to VCC + 0.5V
  • IIK, IOK: &plusnm;20mA
  • Per-pin IOUT: &plusnm;25mA
  • Per-pin ICC: &plusnm;50mA
  • PD: 500mW
  • Tstg: −65°C to +150°C
  • TL: +260°C

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  • Typical propagation delay: 20ns
  • Low quiescent current: 80μA (max)
  • Fanout of 10 LS−TTL loads
  • Absolute maximum ratings:*
    Supply voltage, VCC: −0.5 to +7.0Vr
  • VIN: −1.5 to VCC +1.5V
  • VOUT: −0.5 to VCC + 0.5V
  • IK, IOK: &plusnm;20mA
  • Per-pin IOUT: &plusnm;25mA
  • Per-pin ICC: &plusnm;50mA
  • PD: 500mW
  • Tstg: −65°C to +150°C
  • TL: +260°C

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  • TTL input compatible
  • Typical propagation delay: 14ns
  • 3−STATE outputs for connection to system buses
  • Low quiescent current: 80μA
  • High output drive current: 6mA (min)
  • Absolute maximum ratings:*
    Supply voltage, VCC: −0.5 to +7.0V
  • VIN: −1.5 to VCC +1.5V
  • VOUT: −0.5 to VCC + 0.5V
  • IIK, IOK: &plusnm;20mA
  • Per-pin IOUT: &plusnm;35mA
  • Per-pin: &plusnm;70mA
  • PD: 600mW
  • Tstg: −65°C to +150°C
  • TL: +260°C

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NTE74HCT244 IC High-Speed CMOS Buffer

Price:
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0

  • TTL input compatible
  • Typical propagation delay: 14ns
  • 3−STATE outputs for connection to system buses
  • Low quiescent current: 80μA
  • High output drive current: 6mA (min)
  • Absolute maximum ratings:*
    Supply voltage, VCC: −0.5 to +7.0V
  • VIN: −1.5 to VCC +1.5V
  • VOUT: −0.5 to VCC + 0.5V
  • IIK, IOK: &plusnm;20mA
  • Per-pin IOUT: &plusnm;35mA
  • Per-pin ICC: &plusnm;70mA
  • PD: 600mW
  • Tstg: −65°C to +150°C
  • TL: +260°C

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   Free Ground Shipping on orders over $25.  More details

Availability:

ONLINE In stock
Usually ships in 1 - 2 business days


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Product Summary

The NTE74HCT161 (Asynchronous Clear) and NTE74HCT163 (Synchronous Clear) are synchronous presettable counters in a 16−Lead DIP-type package that utilize microCMOS Technology, 3.0 micron silicon-gate N−well CMOS, and internal look−ahead carry logic for use in high-speed counting applications. They offer the high-noise immunity and low-power consumption inherent to CMOS with speeds similar to low-power Schottky TTL. All flip−flops are clocked simultaneously on the low-to-high-to-transition (positive−edge) of the CLOCK input waveform. These counters may be preset using the LOAD input. Presetting of all four flip−flops is synchronous to the rising edge of CLOCK. When LOAD is held low, counting is disabled and the data on the A, B, C and D inputs is loaded into the counter on the rising edge of CLOCK. If the load input is taken high before the positive edge of CLOCK, the count operation will be unaffected. Both of these counters may be cleared by utilizing the CLEAR input. The clear function on the NTE74HCT163 counter is synchronous to the clock. That is, the counter is cleared on the positive edge of CLOCK while the clear input is held low. The NTE74HCT161 counter is cleared asynchronously. When the CLEAR is taken low, the counter is cleared immediately, regardless of the CLOCK. Two active high enable inputs (ENP and ENT) and a RIPPLE CARRY (RC) output are provided to enable easy cascading of counters. Both ENABLE inputs must be high to count. The ENT input also enables the RC output. When enabled, the RC outputs a positive pulse when the counter overflows. This pulse is approximately equal in duration to the high-level portion of the QA output. The RC output is fed to successive cascaded stages to facilitate easy implementation of N−bit counters. These circuits are TTL input and output compatible and all inputs are protected from damage due to static discharge by diodes to VCC and GND.

  • Typical operating frequency: 40MHz
  • Typical propagation delay: clock to Q: 18ns
  • Low quiescent current: 80μA (max)
  • Low-input current: 1μA (max)
  • Wide-power supply range: 2V to 6V
  • TTL input compatible inputs
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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