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IDT54FCT648TEB Datasheet(PDF) 1 Page - Integrated Device Technology |
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IDT54FCT648TEB Datasheet(HTML) 1 Page - Integrated Device Technology |
1 / 9 page MILITARY AND COMMERCIAL TEMPERATURE RANGES SEPTEMBER 1996 ©1996 Integrated Device Technology, Inc. 6.20 DSC-2634/9 Integrated Device Technology, Inc. 1 FAST CMOS OCTAL TRANSCEIVER/ REGISTERS (3-STATE) 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 con- sist 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 regis- ters. 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 real- time 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 real- time 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 appro- priate 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. 2634 drw 01 The IDT logo is a registered trademark of Integrated Device Technology, Inc. IDT54/74FCT646T/AT/CT/DT - 2646T/AT/CT IDT54/74FCT648T/AT/CT IDT54/74FCT652T/AT/CT/DT - 2652T/AT/CT A1 G DIR CPBA SBA CPAB SAB GBA GAB 1 OF 8 CHANNELS B REG A REG B1 1D C1 C1 1D TO 7 OTHER CHANNELS 646/2646/652/2652 ONLY 646/2646/652/2652 ONLY IDT54/74FCT652/2652 ONLY IDT54/74FCT646/2646/648 ONLY FUNCTIONAL BLOCK DIAGRAM |
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