HC646

HD74HC646 HITACHI

Document overview

• Manufacturer or author: Provided By www.digicamel.com(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 10

Technical content

Features

• High Speed Operation: tpd (Bus to Bus) = 14 ns typ (CL = 50 pF)
• High Output Current: Fanout of 15 LSTTL Loads
• Wide Operating Voltage: VCC = 2 to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)

Control Clock Select Data I/O Data I/O Operation or Function G Direction BA AB AB BA A1 thru A8 B1 thru B8 HD74HC646 HD74HC648 H X X X X X Z (Input) Z (Input) Isolation Isolation HX H H Z (Input) Z (Input) Store A & B data Store A & B data L L X X X L Output Z (Input) B real-time data to A bus B real-time data to A bus L L H H X H Output Z (Input) B stored data to A bus B stored data to A bus L L LLXH Output Z (Input) B stored data to A bus B stored data to A bus L H X X L X Z (Input) Output A real-time data to B bus A real-time data to B bus L H H H H X Z (Input) Output A stored data to B bus A stored data to B bus L H L L H X Z (Input) Output A stored data to B bus A stored data to B bus Bus A Real-time transfer Bus B to Bus A Bus B Real-time transfer Bus A to Bus B Bus A Bus B

A, B, or A and B Bus A Bus B Bus A Transfer stored data to A or B Bus B Pin Arrangement Clock AR Select AB Direciton A GND VCC Clock BA Select BA Control G B (Top view)

Supply voltage range V CC –0.5 to +7.0 V Input voltage V IN –0.5 to VCC + 0.5 V Output voltage V OUT –0.5 to VCC + 0.5 V Output current I OUT –35 mA DC current drain per VCC , GND I CC , IGND –75 mA DC input diode current I IK –20 mA DC output diode current I OK –20 mA Power Dissipation per package P T 500 mW Storage temperature Tstg –65 to +150 °C Logic Diagram HD74HC646 x 7 CBACAB SAB SBA G DIR Q CBA CBA D Q CAB CABD V CC VCC

G DIR Q CBA CBA D Q CAB CABD V CC VCC

Ta = 25°C Ta = –40 to +85°C Item Symbol V CC (V) Min Typ Max Min Max Unit Test Conditions Input voltage V IH 2.0 1.5 — — 1.5 — V 6.0 4.2 — — 4.2 — 6.0 — — 1.8 — 1.8 Output voltage V OH 2.0 1.9 2.0 — 1.9 — V Vin = V IH or VIL IOH = –20 mA 4.5 4.18 — — 4.13 — I OH = –6 mA VOL 2.0 — 0.0 0.1 — 0.1 V Vin = V IH or VIL IOL = 20 mA 4.5 — — 0.26 — 0.33 I OL = 6 mA 6.0 — — 0.26 — 0.33 I OL = 7.8 mA Off-state output current IOZ 6.0 — — –0.5 — –5.0 mA Vin = V IH or VIL, Vout = VCC or GND Input current Iin 6.0 — — –0.1 — –1.0 mA Vin = V CC or GND Quiescent supply current ICC 6.0 — — 4.0 — 40 mA Vin = V CC or GND, Iout = 0 mA

AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns) Ta = 25°C Ta = –40 to +85°C Item Symbol V CC (V) Min Typ Max Min Max Unit Test Conditions Maximum clock f max 2.0 — — 5 — 4 ns Clock AB to B or frequency 4.5 — — 27 — 21 Clock BA to A 6.0 — — 32 — 25 Propagation delay tPLH 2.0 — — 170 — 215 ns A or B input to B or A output time t PHL 4.5 — 14 34 — 43 (HD74HC646 only) 6.0 — — 29 — 37 tPLH 2.0 — — 150 — 190 ns A or B input to B or A output tPHL 4.5 — 14 30 — 38 (HD74HC648 only) 6.0 — — 26 — 33 tPLH 2.0 — — 220 — 275 ns Clock BA or Clock AB input to tPHL 4.5 — 18 44 — 55 A or B output 6.0 — — 37 — 47 tPLH 2.0 — — 170 — 215 ns Select BA or Select AB input to tPHL 4.5 — 15 34 — 43 A or B output, with A or B high 6.0 — — 29 — 37 tPLH 2.0 — — 170 — 215 ns Select BA or Select AB input to tPHL 4.5 — 16 34 — 43 A or B output, with A or B low 6.0 — — 29 — 37 Output enable t ZH 2.0 — — 150 — 190 ns Control G input or Direction to time t ZL 4.5 — 17 30 — 38 A or B output 6.0 — — 26 — 33 Output disable t LZ 2.0 — — 150 — 190 ns Control G input to A or B time t HZ 4.5 — 20 30 — 38 output 6.0 — — 26 — 33 Setup time t su 2.0 100 — — 125 — ns 4.5 20 3 — 25 — 6.0 17 — — 21 — Hold time t h 2.0 5 — — 5 — ns 4.5 5 0 — 5 — 6.0 5 — — 5 —

AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns) (cont) Ta = 25°C Ta = –40 to +85°C Item Symbol V CC (V) Min Typ Max Min Max Unit Test Conditions Pulse width t w 2.0 80 — — 100 — ns 4.5 16 5 — 20 — 6.0 14 — — 17 — Output rise/fall tTLH 2.0 — — 60 — 75 ns time t THL 4.5 — 4 12 — 15 6.0 — — 10 — 13 Input capacitance Cin — — 5 10 — 10 pF

(reference value) DP-24 Conforms Conforms 3.1 g Unit: mm 15.24 0.25 + 0.11 – 0.05

0.51 Min

31.6

32.5 Max 24 13

15.0 Max

13.4 1.2 0° – 15°

2.13 Max

1. Hitachi neither warrants nor grants licenses of any rights of Hitachi’s or any third party’s patent, copyright, trademark, or other intellectual property rights for information contained in this document. Hitachi bears no responsibility for problems that may arise with third party’s rights, including intellectual property rights, in connection with use of the information contained in this document. 2. Products and product specifications may be subject to change without notice. Confirm that you have received the latest product standards or specifications before final design, purchase or use. 3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However, contact Hitachi’s sales office before using the product in an application that demands especially high quality and reliability or where its failure or malfunction may directly threaten human life or cause risk of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation, traffic, safety equipment or medical equipment for life support. 4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly for maximum rating, operating supply voltage range, heat radiation characteristics, installation conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable failure rates or failure modes in semiconductor devices and employ systemic measures such as fail- safes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other consequential damage due to operation of the Hitachi product. 5. This product is not designed to be radiation resistant. 6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without written approval from Hitachi. 7. Contact Hitachi’s sales office for any questions regarding this document or Hitachi semiconductor products. Hitachi, Ltd. Semiconductor & Integrated Circuits. Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan Tel: Tokyo (03) 3270-2111 Fax: (03) 3270-5109 Copyright © Hitachi, Ltd., 1999. All rights reserved. Printed in Japan. Hitachi Asia Pte. Ltd.

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