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SN74AHCT257

Features: · Inputs Are TTL-Voltage Compatible· EPICE (Enhanced-Performance Implanted CMOS) Process· Package Options Include Plastic Small-Outline (D), Shrink Small-Outline (DB), Thin Very Small-Outline (DGV), Thin Shrink Small-Outline (PW), and Ceramic Flat (W) Packages, Ceramic Chip Carriers (FK)...

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SeekIC No. : 004498037 Detail

SN74AHCT257: Features: · Inputs Are TTL-Voltage Compatible· EPICE (Enhanced-Performance Implanted CMOS) Process· Package Options Include Plastic Small-Outline (D), Shrink Small-Outline (DB), Thin Very Small-Outl...

SN74AHCT257 Data Sheet

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Part Number:
SN74AHCT257
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

· Inputs Are TTL-Voltage Compatible
· EPICE (Enhanced-Performance Implanted CMOS) Process
· Package Options Include Plastic Small-Outline (D), Shrink Small-Outline (DB), Thin Very Small-Outline (DGV), Thin Shrink Small-Outline (PW), and Ceramic Flat (W) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) DIPs




Pinout

Connection Diagram




Specifications

Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to 7 V
Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  0.5 V to VCC + 0.5 V
Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA
Package thermal impedance, JA (see Note 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  113°C/W
                                                                    DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131°C/W
                                                                    DGV package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180°C/W
                                                                  N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78°C/W
                                                                    PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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   'AHCT257  quadruple 2-line to 1-line data selectors/multiplexers are designed for 4.5-V to 5.5-V VCC operation.

The 'AHCT257 devices are designed to multiplex  signals from 4-bit data sources to 4-output data lines in bus-organized systems. The 3-state outputs do not load the data lines when the output-enable (OE) input is at the high logic level.

To ensure the high-impedance state of  'AHCT257  during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. The SN54AHCT257 is characterized for operation over the full military temperature range of 55°C to 125°C. The SN74AHCT257 is characterized for operation from 40°C to 85°C.




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