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CD54FCT245 데이터시트(PDF) 1 Page - Texas Instruments |
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CD54FCT245 데이터시트(HTML) 1 Page - Texas Instruments |
1 / 7 page 1 Data sheet acquired from Harris Semiconductor SCHS271A Features • Buffered Inputs • Typical Propagation Delay: 5.0ns at VCC = 5V, TA = 25 oC • Noninverting • SCR Latchup Resistant BiCMOS Process and Circuit Design • Speed of Bipolar FAST™/AS/S • 64mA Output Sink Current (74 Series) • 48mA Output Sink Current (54 Series) • Output Voltage Swing Limited to 3.7V at VCC = 5V • Controlled Output Edge Rates • Input/Output Isolation to VCC • BiCMOS Technology with Low Quiescent Power Description The CD54/74FCT245 octal bus transceiver uses a small geometry BiCMOS technology. The output stage is a combi- nation of bipolar and CMOS transistors that limits the output HIGH level to two diode drops below VCC. This resultant lowering of output swing (0V to 3.7V) reduces power bus ringing (a source of EMI) and minimizes VCC bounce and ground bounce and their effects during simultaneous output switching. The output configuration also enhances switching speed and is capable of sinking 48mA to 64mA. The CD54/74FCT245 is a noninverting, three-state, bidirec- tional transceiver/buffer intended for two-way transmission from”A” bus to “B” bus or “B” bus to “A” bus. The logic level present on the Direction Input (DIR) determines the data direc- tion. When the Output Enable input is HIGH, the outputs are in the high impedance state. Pinout Ordering Information PART NUMBER TEMP. RANGE (oC) PACKAGE PKG. NO. CD74FCT245E 0 to 70 20 Ld PDIP E20.3 CD74FCT245M 0 to 70 20 Ld SOIC M20.3 CD54FCT245E -55 to 125 20 Ld PDIP E20.3 NOTE: When ordering the suffix M and SM packages, use the entire part number. Add the suffix 96 to obtain the variant in the tape and reel. CD54FCT245, CD74FCT245 (PDIP, SOIC) TOP VIEW 11 12 13 14 15 16 17 18 20 19 10 9 8 7 6 5 4 3 2 1 DIR A0 A1 A2 A3 A4 A6 A5 A7 GND VCC B0 B1 B2 B3 B4 B5 B6 B7 OE January 1997 - Revised October 1999 CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures. FAST™ is a trademark of Fairchild Semiconductor. Copyright © 1999, Texas Instruments Incorporated CD54FCT245, CD74FCT245 BiCMOS FCT Interface Logic, Octal-Bus Tranceivers, Three-State |
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