dm74als257 Fairchild Semiconductor, dm74als257 Datasheet
dm74als257
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dm74als257 Summary of contents
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... A 4-bit word selected from one of two sources is routed to the four outputs. The DM74ALS257 presents true data whereas the DM74ALS258 presents inverted data to minimize propa- gation delay time. This 3-STATE output feature means that n-bit (paral- leled) data selectors with up to 258 sources can be implemented for data buses ...
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... Connection Diagram Function Table Inputs Output Control Select HIGH Level L LOW Level X Don't Care Z High Impedance (OFF) ©1984 Fairchild Semiconductor Corporation DM74ALS257, DM74ALS258 Rev. 1.2 Output DM74ALS257 DM74ALS258 Z H ...
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... Logic Diagrams ©1984 Fairchild Semiconductor Corporation DM74ALS257, DM74ALS258 Rev. 1.2 DM74ALS257 DM74ALS258 3 www.fairchildsemi.com ...
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... IH V LOW Level Input Voltage IL I HIGH Level Output Current OH I LOW Level Output Current OL T Free Air Operating Temperature A ©1984 Fairchild Semiconductor Corporation DM74ALS257, DM74ALS258 Rev. 1.2 Parameter Parameter Min. 4 Rating 7V 7V 5.5V 0°C to +70°C –65°C to +150°C 102.0°C/W Nom ...
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... OFF-State Output Current, OZL LOW Level Voltage Applied I Supply Current DM74ALS257 V CCH DM74ALS258 I Supply Current DM74ALS257 CCL DM74ALS258 I Supply Current DM74ALS257 CCZ DM74ALS258 ©1984 Fairchild Semiconductor Corporation DM74ALS257, DM74ALS258 Rev. 1.2 Conditions V 4.5V, I –18mA 4.5V I –2.6mA –0.4mA 4.5V ...
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... Output Enable Time to HIGH ZH Level t Output Enable Time to LOW ZL Level t Output Disable Time from HZ HIGH Level t Output Disable Time from LZ LOW Level ©1984 Fairchild Semiconductor Corporation DM74ALS257, DM74ALS258 Rev. 1.2 Conditions From V 4.5V to 5.5V, Data CC C 50pF 500 Data L Select Select Output Control ...
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... Physical Dimensions Dimensions are in millimeters unless otherwise noted. Figure 1. 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow ©1984 Fairchild Semiconductor Corporation DM74ALS257, DM74ALS258 Rev. 1.2 Package Number M16A 7 www.fairchildsemi.com ...
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... Physical Dimensions (Continued) Dimensions are in millimeters unless otherwise noted. Figure 2. 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide ©1984 Fairchild Semiconductor Corporation DM74ALS257, DM74ALS258 Rev. 1.2 Package Number M16D 8 www.fairchildsemi.com ...
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... Advance Information Formative or In Design Preliminary First Production No Identification Needed Full Production Obsolete Not In Production ©1984 Fairchild Semiconductor Corporation DM74ALS257, DM74ALS258 Rev. 1.2 Green FPS™ e-Series™ Power-SPM™ GTO™ PowerTrench i-Lo™ Programmable Active Droop™ ® IntelliMAX™ ...