数据搜索系统,热门电子元器件搜索 |
|
CD74HCT646M96 数据表(PDF) 1 Page - Texas Instruments |
|
|
CD74HCT646M96 数据表(HTML) 1 Page - Texas Instruments |
1 / 18 page CD54HC646, CD74HCT646 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCHS278B – APRIL 2003 – REVISED APRIL 2003 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D 2-V to 6-V VCC Operation (CD54HC646) D 4.5-V to 5.5-V VCC Operation (CD74HCT646) D Wide Operating Temperature Range of –55 °C to 125°C D Balanced Propagation Delays and Transition Times D Standard Outputs Drive Up To 15 LS-TTL Loads D Significant Power Reduction Compared to LS-TTL Logic ICs D Inputs Are TTL-Voltage Compatible (CD74HCT646) D Independent Registers for A and B Buses D Multiplexed Real-Time and Stored Data D True Data Paths description/ordering information The CD54HC646 and CD74HCT646 consist of bus-transceiver circuits with 3-state outputs, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the input bus or from the internal registers. Data on the A or B bus is clocked into the registers on the low-to-high transition of the appropriate clock (CLKAB or CLKBA) input. Figure 1 illustrates the four fundamental bus-management functions that can be performed with these devices. Output-enable (OE) and direction-control (DIR) inputs control the transceiver functions. In the transceiver mode, data present at the high-impedance port can be stored in either or both registers. The select-control (SAB and SBA) inputs can multiplex stored and real-time (transparent mode) data. DIR determines which bus receives data when OE is active (low). In the isolation mode (OE high), A data can be stored in one register and /or B data can be stored in the other register. When an output function is disabled, the input function still is enabled and can be used to store data. Only one of the two buses, A or B, can be driven at a time. To ensure the high-impedance state 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. ORDERING INFORMATION TA PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING 55 °Cto125°C SOIC – M Tape and reel CD74HCT646M96 HCT646M –55 °C to 125°C CDIP – F Tube CD54HC646F3A CD54HC646F3A † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. Copyright 2003, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. CLKAB SAB DIR A1 A2 A3 A4 A5 A6 A7 A8 GND VCC CLKBA SBA OE B1 B2 B3 B4 B5 B6 B7 B8 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 CD54HC646 ...F PACKAGE CD74HCT646 ...M PACKAGE (TOP VIEW) On products compliant to MIL-PRF-38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters. |
类似零件编号 - CD74HCT646M96 |
|
类似说明 - CD74HCT646M96 |
|
|
链接网址 |
隐私政策 |
ALLDATASHEETCN.COM |
ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 链接交换 | 制造商名单 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 |