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CD74AC257 Folha de dados(PDF) 1 Page - Texas Instruments |
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CD74AC257 Folha de dados(HTML) 1 Page - Texas Instruments |
1 / 8 page 1 Data sheet acquired from Harris Semiconductor SCHS248 Features • CD74AC257, CD74ACT257 . . . . Non-Inverting Outputs • CD74ACT258 . . . . . . . . . . . . . . . . . . . Inverting Outputs • Buffered Inputs • Typical Propagation Delay - 4.4ns at VCC = 5V, TA = 25 oC, C L = 50pF • Exceeds 2kV ESD Protection MIL-STD-883, Method 3015 • SCR-Latchup-Resistant CMOS Process and Circuit Design • Speed of Bipolar FAST™/AS/S with Significantly Reduced Power Consumption • Balanced Propagation Delays • AC Types Feature 1.5V to 5.5V Operation and Balanced Noise Immunity at 30% of the Supply • ±24mA Output Drive Current - Fanout to 15 FAST™ ICs Drives 50 Ω Transmission Lines Pinout CD74AC257, CD74ACT257, CD74ACT258 (PDIP, SOIC) TOP VIEW Description The CD74AC257, CD74ACT257 and CD74ACT258 are quad 2-input multiplexers with three-state outputs that utilize the Harris Advanced CMOS Logic technology. Each of these devices selects four bits of data from two sources under the control of a common Select input (S). The Output Enable (OE) is active LOW. When OE is HIGH, all of the outputs (Y or Y) are in the high-impedance state regardless of all other input conditions. Moving data from two groups of registers to four common output buses is a common use of the CD74AC257, CD74ACT257 and CD74ACT258. The state of the Select input determines the particular register from which the data comes. The CD74AC257, CD74ACT257 and CD74ACT258 can also be used as function generators. 14 15 16 9 13 12 11 10 1 2 3 4 5 7 6 8 S 1I0 1I1 1Y 2I0 2I1 GND 2Y VCC 4I0 4I1 4Y 3I0 3I1 3Y OE AC/ACT257 ACT258 ACT258 AC/ACT257 VCC 4I0 4I1 4Y 3I0 3I1 3Y OE S 1I0 1I1 1Y 2I0 2I1 GND 2Y Ordering Information PART NUMBER TEMP. RANGE (oC) PACKAGE PKG. NO. CD74AC257E 0 to 70oC, -40 to 85, -55 to 125 16 Ld PDIP E16.3 CD74ACT257E 0 to 70oC, -40 to 85, -55 to 125 16 Ld PDIP E16.3 CD74ACT258E 0 to 70oC, -40 to 85, -55 to 125 16 Ld PDIP E16.3 CD74AC257M 0 to 70oC, -40 to 85, -55 to 125 16 Ld SOIC M16.15 CD74ACT257M 0 to 70oC, -40 to 85, -55 to 125 16 Ld SOIC M16.15 CD74ACT258M 0 to 70oC, -40 to 85, -55 to 125 16 Ld SOIC M16.15 NOTES: 1. When ordering, use the entire part number. Add the suffix 96 to obtain the variant in the tape and reel. 2. Wafer and die for this part number is available which meets all elec- trical specifications. Please contact your local sales office or Harris customer service for ordering information. August 1998 CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures. FAST™ is a Trademark of Fairchild Semiconductor. Copyright © Harris Corporation 1998 CD74AC257, CD74ACT257, CD74ACT258 Quad 2-Input Multiplexer with Three-State Outputs File Number 1955.1 |
Nº de peça semelhante - CD74AC257 |
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Descrição semelhante - CD74AC257 |
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