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AHCT - Advanced High-Speed CMOS

The Advanced High-Speed CMOS (AHC/AHCT) Logic Family from Texas Instruments provides an effortless and reliable migration path for High-Speed CMOS (HC/HCT) users by providing enhanced performance, low noise, broad product selection, with superior availability at the same market price as HCMOS.

The AHC Logic Family offers the broadest selection of logic choices including gates, octals, single-gates, and Widebus™ devices. The AHC family can operate at a VCC of 3.3 or 5 Volts providing an effortless migration path from HCMOS.

AHCT family advantages include:

  • Low Noise - The same low noise of HCMOS without the overshoot and undershoot typical of higher-drive devices usually necessary to achieve AHC speeds.
  • Low Power - The AHC family has half the static power consumption of HCMOS, 40 µA maximum static current.
  • Speed - With typical propagation delays of 5.2 ns for octals, AHC offers three times the speed of HCMOS.
  • Drive - Output-drive current is ± 8 mA at 5V and ± 4 mA at 3.3V.
  • 5V Input Tolerance at 3.3V - With the input diode to VCC removed, AHC is specified for both 5V and 3.3V operation.

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5V Supply Voltage (131) Low Power Consumption (61) Medium Power Consumption (82)
Cost Optimized (75) spacer Low Speed (67) spacer Medium Speed (22) spacer
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Approx. Price (US$) Logic No. of Bits No. of Gates No. of Outputs Operating Temperature Range (C) Output Output Drive (mA) Technology Family
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Part Number  Status  
Sub Family  		5V Supply Voltage  Cost Optimized  Input Level  Logic  Low Power Consumption  Low Speed  Medium Power Consumption  Medium Speed  No. of Bits  No. of Gates  No. of Outputs  Numeric Price for Sort  Output  Output Drive (mA)  Output Level  Performance Optimized  Rating  Static Current  Technology Family  Transceivers w/Registers/UBT  Vcc range (V)  Very Low Power Consumption  Voltage Nodes (V)  tpd max (ns)  Pin/Package  Approx. Price (US$)  
Description  
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SN54ALS520 ACTIVE  Address/Identity/Magnitude Comparator  Yes    TTL  Inv          8      16.25      TTL    Military    ALS  Yes  4.5 to 5.5    5    20CDIP
20LCCC		16.25 | 100u  8-Bit Identity/Magnitude Comparators (P=Q) with Enable and 20K Ohm Q-Input Pullup Resistors  
SN54ALS688 ACTIVE  Address/Identity/Magnitude Comparator  Yes    TTL  Inv          8      11.9      TTL    Military    ALS  Yes  4.5 to 5.5    5    20CDIP
20CFP
20LCCC		11.90 | 100u  8-Bit Identity/Magnitude Comparators (P=Q) with Enable  
SN74ALS518ACTIVE  Address/Identity/Magnitude Comparator  Yes    TTL  True          8      7.4      TTL    Catalog    ALS  Yes  4.5 to 5.5    5    20PDIP
20SO
20SOIC		7.40 | 1ku  8-Bit Identity Comparators (P=Q) w/ Enable, Open Collector Outputs, 20K Ohm Q-Input Pullup Resistor  
SN74ALS520ACTIVE  Address/Identity/Magnitude Comparator  Yes    TTL  Inv          8      1.85      TTL    Catalog    ALS  Yes  4.5 to 5.5    5    20PDIP
20SO
20SOIC		1.85 | 1ku  8-Bit Identity Comparators (P=Q) with Enable and 20K Ohm Q-Input Pullup Resistors  
SN74ALS688ACTIVE  Address/Identity/Magnitude Comparator  Yes    TTL  Inv          8      4.7      TTL    Catalog    ALS  Yes  4.5 to 5.5    5    20PDIP
20SO
20SOIC		4.70 | 1ku  8-Bit Identity/Magnitude Comparators (P=Q) with Enable  
SN54ALS08 ACTIVE  AND Gate      TTL              4    2.8    -0.4/4  TTL    Military    ALS    4.5 to 5.5    5  14  14CDIP
14CFP
20LCCC		2.80 | 100u  Quadruple 2-Input Positive-AND Gates  
SN54ALS09 ACTIVE  AND Gate      TTL              4    2.8    - /4  TTL    Military    ALS    4.5 to 5.5    5  69  14CDIP
20LCCC		2.80 | 100u  Quadruple 2-Input Positive-AND Gates With Open-Collector Outputs  
SN54ALS11A ACTIVE  AND Gate      TTL              3    2.8    -0.4/4  TTL    Military    ALS    4.5 to 5.5    5  14  14CDIP
14CFP
20LCCC		2.80 | 100u  Triple 3-Input Positive-AND Gates  
SN54ALS21A ACTIVE  AND Gate      TTL              2    2.8    -0.4/4  TTL    Military    ALS    4.5 to 5.5    5  18  14CDIP
14CFP
20LCCC		2.80 | 100u  Dual 4-Input Positive-AND Gates  
SN74ALS08ACTIVE  AND Gate      TTL              4    .43    -0.4/8  TTL    Catalog    ALS    4.5 to 5.5    5  14  14PDIP
14SO
14SOIC		0.43 | 1ku  Quadruple 2-Input Positive-AND Gates  
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