Electronic Components Datasheet Search |
|
CD74HC257E Datasheet(PDF) 1 Page - Texas Instruments |
|
|
CD74HC257E Datasheet(HTML) 1 Page - Texas Instruments |
1 / 7 page 1 Data sheet acquired from Harris Semiconductor SCHS171 Features • Buffered Inputs • Typical Propagation Delay ( In to Output ) = 12ns at VCC = 5V, CL = 15pF, TA = 25 oC • Fanout (Over Temperature Range) - Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads - Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads • Wide Operating Temperature Range . . . -55oC to 125oC • Balanced Propagation Delay and Transition Times • Significant Power Reduction Compared to LSTTL Logic ICs • HC Types - 2V to 6V Operation - High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V • HCT Types - 4.5V to 5.5V Operation - Direct LSTTL Input Logic Compatibility, VIL= 0.8V (Max), VIH = 2V (Min) - CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH Description The Harris CD74HC257 and CD74HCT257 are quad 2-input multiplexers which select four bits of data from two sources under the control of a common Select Input (S). The Output Enable input (OE) is active LOW. When OE is HIGH, all of the outputs (1Y-4Y) are in the high impedance state regard- less of all other input conditions. Moving data from two groups of registers to four common output busses is a common use of the 257. The state of the Select input determines the particular register from which the data comes. It can also be used as a function generator. Pinout CD74HC257, CD74HC257 (PDIP, SOIC) TOP VIEW Ordering Information PART NUMBER TEMP. RANGE (oC) PACKAGE PKG. NO. CD74HC257E -55 to 125 16 Ld PDIP E16.3 CD74HCT257E -55 to 125 16 Ld PDIP E16.3 CD74HC257M -55 to 125 16 Ld SOIC M16.15 CD74HCT257M -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 or die for this part number is available which meets all electrical specifications. Please contact your local sales office or Harris customer service for ordering information. 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 November 1997 CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures. Copyright © Harris Corporation 1997 CD74HC257, CD74HCT257 High Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs File Number 1650.1 [ /Title (CD74 HC257 , CD74 HCT25 7) /Sub- ject (High Speed CMOS Logic Quad 2-Input Multi- plexer |
Similar Part No. - CD74HC257E |
|
Similar Description - CD74HC257E |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |