DatasheetsPDF.com

IDT74FCT2646AT Dataheets PDF



Part Number IDT74FCT2646AT
Manufacturers Integrated Device Tech
Logo Integrated Device Tech
Description FAST CMOS OCTAL TRANSCEIVER/REGISTERS
Datasheet IDT74FCT2646AT DatasheetIDT74FCT2646AT Datasheet (PDF)

FAST CMOS OCTAL TRANSCEIVER/ REGISTERS (3-STATE) Integrated Device Technology, Inc. IDT54/74FCT646T/AT/CT/DT - 2646T/AT/CT IDT54/74FCT648T/AT/CT IDT54/74FCT652T/AT/CT/DT - 2652T/AT/CT FEATURES: • Common features: – Low input and output leakage ≤1µA (max.) – Extended commercial range of –40°C to +85°C – CMOS power levels – True TTL input and output compatibility – VOH = 3.3V (typ.) – VOL = 0.3V (typ.) – Meets or exceeds JEDEC standard 18 specifications – Product available in Radiation Tolerant .

  IDT74FCT2646AT   IDT74FCT2646AT


Document
FAST CMOS OCTAL TRANSCEIVER/ REGISTERS (3-STATE) Integrated Device Technology, Inc. IDT54/74FCT646T/AT/CT/DT - 2646T/AT/CT IDT54/74FCT648T/AT/CT IDT54/74FCT652T/AT/CT/DT - 2652T/AT/CT FEATURES: • Common features: – Low input and output leakage ≤1µA (max.) – Extended commercial range of –40°C to +85°C – CMOS power levels – True TTL input and output compatibility – VOH = 3.3V (typ.) – VOL = 0.3V (typ.) – Meets or exceeds JEDEC standard 18 specifications – Product available in Radiation Tolerant and Radiation Enhanced versions – Military product compliant to MIL-STD-883, Class B and DESC listed (dual marked) – Available in DIP, SOIC, SSOP, QSOP, TSSOP, CERPACK and LCC packages • Features for FCT646T/648T/652T: – Std., A, C and D speed grades – High drive outputs (-15mA IOH, 64mA IOL) – Power off disable outputs permit “live insertion” • Features for FCT2646T/2652T: – Std., A, and C speed grades – Resistor outputs (-15mA IOH, 12mA IOL Com.) (-12mA IOH, 12mA IOL Mil.) – Reduced system switching noise DESCRIPTION: The FCT646T/FCT2646T/FCT648T/FCT652T/2652T consist of a bus transceiver with 3-state D-type flip-flops and control circuitry arranged for multiplexed transmission of data directly from the data bus or from the internal storage registers. The FCT652T/FCT2652T utilize GAB and GBA signals to control the transceiver functions. The FCT646T/FCT2646T/ FCT648T utilize the enable control (G) and direction (DIR) pins to control the transceiver functions. SAB and SBA control pins are provided to select either realtime or stored data transfer. The circuitry used for select control will eliminate the typical decoding glitch that occurs in a multiplexer during the transition between stored and realtime data. A LOW input level selects real-time data and a HIGH selects stored data. Data on the A or B data bus, or both, can be stored in the internal D flip-flops by LOW-to-HIGH transitions at the appropriate clock pins (CPAB or CPBA), regardless of the select or enable control pins. The FCT26xxT have balanced drive outputs with current limiting resistors. This offers low ground bounce, minimal undershoot and controlled output fall times-reducing the need for external series terminating resistors. FCT2xxxT parts are plug-in replacements for FCTxxxT parts. IDT54/74FCT652/2652 ONLY GBA GAB FUNCTIONAL BLOCK DIAGRAM IDT54/74FCT646/2646/648 ONLY G DIR CPBA SBA CPAB SAB B REG 1 OF 8 CHANNELS 1D C1 646/2646/652/2652 ONLY A1 A REG 1D C1 B1 646/2646/652/2652 ONLY The IDT logo is a registered trademark of Integrated Device Technology, Inc. 2634 drw 01 TO 7 OTHER CHANNELS MILITARY AND COMMERCIAL TEMPERATURE RANGES ©1996 Integrated Device Technology, Inc. SEPTEMBER 1996 DSC-2634/9 6.20 1 IDT54/74FCT646/2646/652/2652T/AT/CT/DT, 648T/AT/CT FAST CMOS OCTAL TRANSCEIVER/REGISTER MILITARY AND COMMERCIAL TEMPERATURE RANGES CPAB NC VCC GND NC B8 A7 A8 B7 B6 CPAB SAB DIR A1 A2 A3 A4 A5 A6 A7 A8 GND 1 2 3 4 5 6 7 8 9 10 11 12 P24-1 D24-1 SO24-2 SO24-7* SO24-8 SO24-9* & E24-1 24 23 22 21 20 19 18 17 16 15 14 13 VCC CPBA SBA DIR G FCT646/FCT2646T FCT648 A1 A2 A3 NC A4 A5 A6 5 6 7 8 9 4 SAB INDEX 3 2 1 28 27 26 25 24 23 L28-1 22 21 CPBA SBA PIN CONFIGURATIONS G B1 B2 NC B3 B4 B5 B1 B2 B3 B4 B5 B6 B7 B8 2634 drw 02 10 20 1112 13 14 15 16 17 1819 2634 drw 03 DIP/SOIC/SSOP/ QSOP/TSSOP/CERPACK TOP VIEW * FCT646/2646T/AT/CT/DT only LCC TOP VIEW GAB CPAB SAB GAB A1 A2 A3 A4 A5 A6 A7 A8 GND 1 2 3 4 5 6 7 8 9 10 11 12 P24-1 D24-1 SO24-2 SO24-7* SO24-8 & E24-1 24 23 22 21 20 19 18 17 16 15 14 13 VCC CPBA SBA FCT652/FCT2652T A1 A2 A3 NC A4 A5 A6 5 6 7 8 GBA 4 SAB INDEX B1 B2 B3 B4 B5 B6 B7 B8 2634 drw 04 3 2 1 28 27 26 25 24 23 L28-1 CPAB NC VCC CPBA SBA GBA B1 B2 NC B3 B4 B5 2634 drw 05 22 21 9 10 20 19 11 12 13 14 15 16 17 18 GND NC A7 A8 B8 B7 B6 DIP/SOIC/SSOP/ QSOP/CERPACK TOP VIEW * FCT652/2652T/AT/CT/DT only LCC TOP VIEW PIN DESCRIPTION Pin Names A1 - A 8 B1 - B 8 CPAB, CPBA SAB, SBA GAB, GBA DIR, G Description Data Register A Inputs Data Register B Outputs Data Register B Inputs Data Register A Outputs Clock Pulse Inputs Output Data Source Select Inputs Output Enable Inputs (646/648) Output Enable Inputs (652) 2634 tbl 01 6.20 2 IDT54/74FCT646/2646/652/2652T/AT/CT/DT, 648T/AT/CT FAST CMOS OCTAL TRANSCEIVER/REGISTER MILITARY AND COMMERCIAL TEMPERATURE RANGES FUNCTION TABLE (646/648) Inputs Data I/O(1) SAB X X X X L H SBA X X L H X X A1 - A8 Input Output Input B1 - B8 Input Input Output Operation or Function FCT646T/FCT2646T Isolation Store A and B Data Real-Time B Data to A Bus Stored B Data to A Bus Real-Time A Data to B Bus Stored A Data to B Bus FCT648T Isolation Store A and B Data Real-Time B Data to A Bus Stored B Data to A Bus Real-Time A Data to B Bus Stored A Data to B Bus 2634 tbl 02 G H H L L L L DIR X X L L H H CPAB H or L ↑ X X X H or L CPBA H or L ↑ X H or L X X FUNCTION TABLE (652) Inputs GAB L L X H L L L L H H H Data I/O SAB X X X X(2) X X X X L H H SBA X X X X.


IDT74FCT257T IDT74FCT2646AT IDT74FCT2652T


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)