HC257

HD74HC257 HITACHI | Alldatasheet

Document overview

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Technical content

Features

• High Speed Operation: tpd (Data to Y) = 10.5 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) Function Table Inputs Outputs Output Control Select A B Y LL L X L LL H X H L H XLL LH X H H H X X X High impedance Notes H: high level, L: low level, X: irrelevant

V CC Output control (Top view) S Absolute Maximum Ratings Item Symbol Rating Unit 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 DC current drain per pin 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

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 Propagation delay tPHL 2.0 — — 115 — 145 ns Data to Y time 4.5 — 11 23 — 29 6.0 — — 20 — 25 tPLH 2.0 — — 115 — 145 ns 4.5 — 10 23 — 29 6.0 — — 20 — 25 tPHL 2.0 — — 115 — 145 ns Select to Y 4.5 — 14 23 — 29 6.0 — — 20 — 25 tPLH 2.0 — — 115 — 145 ns 4.5 — 14 23 — 29 6.0 — — 20 — 25 Output enable t ZL 2.0 — — 150 — 190 ns Output control to Y time 4.5 — 11 30 — 38 6.0 — — 26 — 33 tZH 2.0 — — 150 — 190 ns 4.5 — 13 30 — 38 6.0 — — 26 — 33 Output disable t LZ 2.0 — — 150 — 190 ns Output control to Y time 4.5 — 14 30 — 38 6.0 — — 26 — 33 tHZ 2.0 — — 150 — 190 ns 4.5 — 18 30 — 38 6.0 — — 26 — 33 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-16 Conforms Conforms 1.07 g Unit: mm 6.30 19.20 16 9 1.3

20.00 Max

7.40 Max

7.62 0.25 + 0.13

0.51 Min

2.54 Min5.06 Max 0° – 15°

1.11 Max

(reference value) FP-16DA Conforms 0.24 g Unit: mm *Dimension including the plating thickness Base material dimension *0.22 – 0.05 *0.42 – 0.08 0.12 0.15 M

2.20 Max

5.5 10.06

0.80 Max

10.5 Max

+ 0.20 – 0.307.80 0.70 – 0.20 0° – 8° 0.10 – 0.10 1.15 1.27 0.40 – 0.06 0.20 – 0.04

(reference value) FP-16DN Conforms Conforms 0.15 g Unit: mm *Dimension including the plating thickness Base material dimension 1.27 16 9 1 8 0.15 0.25 M 1.75 Max 3.95 *0.22 – 0.03 9.9 0° – 8°

10.3 Max

+ 0.10 – 0.306.10 + 0.67 – 0.20 0.60 + 0.11 – 0.04 0.14 *0.42 – 0.08

0.635 Max

0.40 – 0.06 0.20 – 0.03 1.08

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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