Philips 74HCT643
The 74HC/HCT643 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. The 74HC/HCT643 are octal transceivers featuring true and inverting 3-state bus compatible outputs in both send and receive directions.| Part No. | 74HCT643 |
|---|---|
| Datasheet | 74HCT643 Download |
| Manufacturer |  Philips |
| Description | Octal bus transceiver |
| Buy | Stock & Price |
FEATURES
● Octal bidirectional bus interface● True and inverting 3-state outputs
● Output capability: bus driver
● ICC category: MSI
GENERAL DESCRIPTION
74HC/HCT643 7A. The “643” features an output enable (OE) input for easy cascading and a send/receive (DIR) for direction control. OE controls the outputs so that the buses are effectively isolated. QUICK REFERENCE DATA GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns TYPICAL SYMBOL tPHL/ tPLH PARAMETER propagation delay An to Bn; inverting Bn to An; true input capacitance input/output capacitance power dissipation capacitance per transceiver notes 1 and 2 CONDITIONS HC CL = 15 pF; VCC = 5 V 7 8 3.5 10 42 8 11 3.5 10 44 ns ns pF pF pF HCT UNIT CI CI/O CPD Notes 1. CPD is used to determine the dynamic power dissipation (PD in µW): PD = CPD × VCC2 × fi + ∑ (CL × VCC2 × fo) where: fi = input frequency in MHz fo = output frequency in MHz ∑ (CL × VCC2 × fo) = sum of outputs CL = output load capacitance in pF VCC = supply voltage in V 2. For HC the condition is VI = GND to VCC For HCT the condition is VI = GND to VCC −1.5 V ORDERING INFORMATION See “74HC/HCT/HCU/HCMOS Logic Package Information”.
