74VHCT240A Datasheet | Fairchild Semiconductor

Description The VHCT240A is an advanced high speed CMOS octal bus transceiver fabricated with silicon gate CMOS technology. It achieves high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. The VHCT240A is an inverting 3-STATE buffer having two active-LOW output enables. This device is designed to be used as 3-STATE memory address drivers, clock drivers, and bus oriented transmitter/receivers. Protection circuits ensure that 0V to 7V can be applied to the input and output (Note 1) pins without regard to the supply voltage. These circuits prevent device destruction due to mismatched supply and input/output voltages. This device can be used to interface 5V to 3V systems and two supply systems such as battery back up. Note 1: Outputs in OFF-State Features s High Speed: t PD = 5.6 ns (typ) at VCC = 5V s Power down protection is provided on inputs and outputs s Low power dissipation: ICC = 4 µA (max) @ TA = 25°C s Pin and function patible with 74HCT240 Ordering Code: Order Number 74VHCT240AM 74VHCT240ASJ 74VHCT240AMTC 74VHCT240AN Package Number M20B M20D MTC20 N20A Package Description 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Symbol IEEE/IEC Connection Diagram Pin Descriptions Pin Names OE1, OE2 I0- I7 O0- O7 Description 3-STATE Output Enable Inputs Outputs 3-STATE Outputs © 1999 Fairchild Semiconductor Corporation DS500002.prf .fairchildsemi. Truth Tables Inputs OE1 L L H Inputs OE1 L L H - HIGH Voltage Level L - LOW Voltage Level X - Immaterial Z - High Impedance In L H X Outputs (Pins 12, 14, 16, 18) H L Z Outputs (Pins...