74VHC299 Datasheet | National Semiconductor

Description The VHC299 is an advanced high speed CMOS device fabricated with silicon gate CMOS technology It achieves the high-speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation The VHC299 is an 8-bit universal shift storage register with TRI-STATE outputs Four modes of operation are possible hold (store) shift left shift right and load data The parallel load inputs and flip-flop outputs are multiplexed to reduce the total number of package pins Additional outputs are provided for flip-flops Q0 Q7 to allow easy serial cascading A separate active LOW Master Reset is used to reset the register An input protection circuit insures that 0V to 7V can be applied to the input pins without regard to the supply voltage This device can be used to interface 5V to 3V systems and two supply systems such as battery backup This circuit prevents device destruction due to mismatched supply and input voltages Features Y Low power dissipation ICC e 4 m A at TA e 25 C Y High noise immunity VNIH e VNIL e 28% VCC (min) Y All inputs are equipped with a power down protection function Y Balanced propagation delays t PLH j t PHL Y Low noise VOLP e 0 9V (typ) Y Pin and function patible with 74HC299 mercial 74VHC299M 74VHC299SJ 74VHC299MTC 74VHC299N Package Number M20B M20D MTC20 N20A Package Description 20-Lead Molded JEDEC SOIC 20-Lead Molded EIAJ SOIC 20-Lead Molded JEDEC Type 1 TSSOP 20-Lead Molded DIP Note Surface mount packages are also available on Tape and Reel Specify by appending the suffix letter ‘X’ to the ordering code Logic Symbols Connection Diagram IEEE IEC Pin Assignment for DIP TSSOP and SOIC TL F 11638- 1 TRI-STATE is a registered trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation TL F 11638 TL F 11638 - 3 TL F 11638 - 2 RRD-B30M125 Printed in U S A Pin Names CP DS0 DS7 S0 S1 MR OE1 OE2 I O0 - I O7 Q0 Q7 Description Clock Pulse Input Serial Data Input for Right Shift...