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IDT74FCT645TQ Datasheet(PDF) 1 Page - Integrated Device Technology |
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IDT74FCT645TQ Datasheet(HTML) 1 Page - Integrated Device Technology |
1 / 8 page Integrated Device Technology, Inc. MILITARY AND COMMERCIAL TEMPERATURE RANGES AUGUST 1995 ©1995 Integrated Device Technology, Inc. 6.9 DSC-4611/4 1 DESCRIPTION: The IDT octal bidirectional transceivers are built using an advanced dual metal CMOS technology. The FCT245T/ FCT2245T, FCT640T and FCT645T are designed for asyn- chronous two-way communication between data buses. The transmit/receive (T/ R) input determines the direction of data flow through the bidirectional transceiver. Transmit (active HIGH) enables data from A ports to B ports, and receive (active LOW) from B ports to A ports. The output enable ( OE) input, when HIGH, disables both A and B ports by placing them in HIGH Z condition. The FCT245T/FCT2245T and FCT645T transceivers have non-inverting outputs. The FCT640T has inverting outputs. The FCT2245T has 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. The FCT2xxxT parts are plug-in replacements for FCTxxxT parts. FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT IDT54/74FCT640T/AT/CT IDT54/74FCT645T/AT/CT/DT FEATURES: • Common features: – Low input and output leakage ≤1µA (max.) – 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, CERPACK and LCC packages • Features for FCT245T/FCT640T/FCT645T: – Std., A, C and D speed grades – High drive outputs (-15mA IOH, 64mA IOL) • Features for FCT2245T: – Std., A and C speed grades – Resistor outputs (-15mA IOH, 12mA IOL Com.) (-12mA IOH, 12mA IOL Mil.) – Reduced system switching noise 2539 drw 01 PIN CONFIGURATIONS FUNCTIONAL BLOCK DIAGRAM 2539 drw 02 The IDT logo is a registered trademark of Integrated Device Technology, Inc. LCC TOP VIEW 5 6 7 8 9 10 A1 A2 A3 1 2 3 4 20 19 18 17 16 15 14 13 Vcc 12 11 T/R B1 A4 A5 A6 A7 OE B2 B3 B4 B5 B6 GND B7 A0 B0 P20-1 D20-1 SO20-2 SO20-7* SO20-8** & E20-1 INDEX B0 B1 B2 B3 B4 A2 A3 A4 A5 A6 15 14 18 17 16 5 6 7 8 4 L20-2 9 10 11 12 13 32 1 20 19 *FCT245T/2245T, FCT645T only. **FCT245T/2245T, FCT640T DIP/SOIC/SSOP/QSOP/CERPACK TOP VIEW FCT245T/2245T, FCT645T are non-inverting options. FCT640T is the inverting options. A B0 0 T/R OE A B1 1 A B2 2 A B3 3 A B4 4 A B5 5 A B6 6 A B7 7 2539 drw 03 |
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