HD74SSTL16857 a 14-bit SSTL_2 Registered Buffer ADE-205-223C (Z) 4th. Edition May 1999 Description The HD74SSTL16857 is a 14-bit registered buffer designed for 2.3 V to 3.6 V Vcc operation and LVCMOS reset (RESET) input / SSTL_2 data (D) inputs and CLK input. Data flow from D to Q is controlled by differential clock pins (CLK, CLK) and the RESET. Data is triggered on the positive edge of the positive clock (CLK), and the negative clock (CLK) must be used to maintain noise margins. When RESET is low, all registers are reset and all outputs are low. To ensure defined outputs from the register before a stable clock has been supplied, RESET must be held in the low state during power up. Features • • • • Supports LVCMOS reset (RESET) input / SSTL_2 data (D) inputs and CLK input Differential SSTL_2 (Stub series terminated logic) CLK signal Flow through architecture optimizes PCB layout Meets SSTL_2 Class I and Class II specifications Function Table Inputs Output Q CLK RESET CLK D L X X X L H ↓ ↑ H H H ↓ ↑ L L H L or H H or L X Q0 *1 H: High level L: Low level X: Immaterial ↑: Low to high transition ↓: High to low transition Note: 1.Output level before the indicated steady state input conditions were established. HD74SSTL16857 Pin Arrangement Q1 1 48 D1 Q2 2 47 D2 GND 3 46 GND V DDQ 4 45 V CC Q3 5 44 D3 Q4 6 43 D4 Q5 7 42 D5 GND 8 41 D6 V DDQ 9 40 D7 Q6 10 39 CLK Q7 11 38 CLK V DDQ 12 37 V CC GND 13 36 GND Q8 14 35 V REF Q9 15 34 RESET V DDQ 16 33 D8 GND 17 32 D9 Q10 18 31 D10 Q11 19 30 D11 Q12 20 29 D12 V DDQ 21 28 V CC GND 22 27 GND Q13 23 26 D13 Q14 24 25 D14 (Top view) Absolute Maximum Ratings Item Symbol Ratings Unit Supply voltage VCC or VDDQ –0.5 to 4.6 V Input voltage *1 VI –0.5 to VDDQ+0.5 V Output voltage *1, 2 Conditions VO –0.5 to VDDQ+0.5 V Input clamp current IIK –50 mA Output clamp current IOK –50 mA VO < 0 Continuous output current IO ±50 mA VO = 0 to VDDQ 2 VI < 0 HD74SSTL16857 Item Symbol Ratings Unit VCC, VDDQ or GND current / pin ICC, IDDQ or IGND ±100 mA Maximum power dissipation at Ta = 55°C (in still air) PT 115 °C / W Storage temperature Tstg –65 to +150 °C Notes: Conditions TSSOP Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute maximum rated conditions for extended periods may affect device reliability. 1.The input and output negative voltage ratings may be exceeded if the input and output clamp current ratings are observed. 2.This current will flow only when the output is in the high state and VO > VDDQ. Recommended Operating Conditions Item Symbol Min Typ Max Unit Conditions Supply voltage VCC VDDQ — 3.6 V Output supply voltage VDDQ 2.3 — 2.7 V Reference voltage VREF 1.15 1.25 1.35 V VREF = 0.5 × VDDQ Termination voltage VTT VREF–40 mV VREF VREF+40 mV V Input voltage VI 0 — VCC V AC high level input voltage VIH VREF+350 mV — — V CLK, CLK, D AC low level input voltage V IL — — VREF–350 mV V CLK, CLK, D DC high level input voltage VIH VREF+180 mV — — V CLK, CLK, D DC low level input voltage VIL — — VREF–180 mV V CLK, CLK, D High level input voltage VIH 1.7 — VDDQ+0.3 V RESET Low level input voltage VIL –0.3 — 0.7 V RESET High level output current IOH — — –20 mA Low level output current IOL — — 20 mA Operating temperature Ta 0 — 70 °C 3 HD74SSTL16857 Logic Diagram *1 RESET 34 CLK CLK 38 39 D1 48 1D C1 R To thirteen other channels Note: 4 1.RESET input gate is conected to VDDQ. 1 Q1 HD74SSTL16857 Electrical Characteristics Item Input diode voltage Symbol VCC (V) VIK 2.3 Output voltage VOH VOL Differential input voltage Input current RESET — –1.2 V IIN = –18 mA — — V IOH = –100 µA 2.3 1.95 — — IOH = –8 mA 2.3 1.70 — — IOH = –16 mA 2.3 to 2.7 — — 0.2 IOL = 100 µA 2.3 — — 0.35 IOL = 8 mA — — 0.55 — 0.97 — 1.53 V VPP — 360 — — m Minimum peak to peak V input µ VIN = 2.7 V or 0 A V = 2.7 V or 0 IN IIN ICC Notes: Common mode range 2.7 — — ±5 — — ±5 2.7 — — ±5 VIN = 1.7 V or 0.8 V VREF = 1.15 V or 1.35 V 2.7 — — ±5 VIN = 2.7 V or 0 VREF = 1.15 V or 1.35 V 3.6 — — ±5 VIN = 1.7 V or 0.8 V VREF = 1.15 V or 1.35 V 3.6 — — ±5 VIN = 2.7 V or 0 VREF = 1.15 V or 1.35 V VREF = 1.15 V or 1.35 V 2.7 — — ±5 3.6 — — ±5 2.7 — — 25 m VIN = 1.7 V or 0.8 V, IO = 0 A 2.7 — — 25 VIN = 2.7 V or 0, IO = 0 3.6 — — 50 VIN = 1.7 V or 0.8 V, IO = 0 VIN = 2.7 V or 0, IO = 0 — — 50 — 3.5 — Data inputs 2.5 *1 — 3.7 — Control inputs 3.3 *2 — 3.5 — Data inputs 3.3 *2 — 3.7 — CIN IOL = 16 mA 3.6 *1 Control inputs U nit Test Conditions 2.3 to 2.7 VCC– 0.2 3.6 capacitance Max 2.3 VREF Input — Typ VCMR CLK, CLK, Data inputs, Quiescent supply current Min 2.5 pF VIN = 1.7 V or 0.8 V 1.All typical values are at VCC = 2.5 V, Ta = 25°C. 2.All typical values are at VCC = 3.3 V, Ta = 25°C. 5 HD74SSTL16857 Switching Characteristics Item Symbol Clock frequency fclock Setup time tsu VCC = 2.5 ± 0.2 V VCC = 3.3 ± 0.3 V Unit Test Condition Min Max Min Max 200 — 200 — MHz ns 1.25 — 1.25 — 1.25 — 1.25 — Data before CLK↑, CLK↓ RESET high before CLK↑, CLK↓ Hold time th 0.75 — 0.75 — ns Data after CLK↑, CLK↓ Pulse width tw 2.0 — 2.0 — ns CLK, CLK “H” or “L” (CL = 10 pF, Class I, VREF = VTT = VDDQ × 0.5) Item Symbol Maximum clock frequency fmax Propagation delay time VCC = 3.3 ± 0.3 V Unit VCC = 2.5 ± 0.2 V Min Typ Max Min Max From To (Input) (Output) 200 — — 200 — MHz tPLH, tPHL 1.5 2.5 3.5 1.5 3.0 ns CLK, CLK Q tPHL — 2.6 5.0 1.0 5.0 ns RESET Q (CL = 30 pF, Class II, VREF = VTT = VDDQ × 0.5) Item Symbol VCC = 3.3 ± 0.3 V Unit From (Input) Min Typ Max Min Max To (Output) 200 — — 200 — MHz tPLH, tPHL 1.5 2.5 3.5 1.5 3.0 ns CLK, CLK Q tPHL — 2.6 5.0 1.0 5.0 ns RESET Q Maximum clock frequency fmax Propagation delay time VCC = 2.5 ± 0.2 V (CL = 50 pF, RL = 500 W, VREF = VTT = VDDQ × 0.5) Item Symbol Maximum clock frequency fmax Propagation delay time tPLH, tPHL tPHL 6 VCC = 2.5 ± 0.2 V VCC = 3.3 ± 0.3 V Unit From (Input) To (Output) Min Typ Max Min Max 150 — — 150 — MHz 1.5 3.8 5.0 1.5 4.5 ns CLK, CLK Q — 4.0 7.0 1.0 6.5 ns RESET Q HD74SSTL16857 Test Circuit • Class I, II VTT Test point 25 Ω *2 25 Ω = SSTL_2 Class II 50 Ω = SSTL_2 Class I *1 C L = 10 pF or 30 pF • C L= 50 pF, R L = 500 Ω Test point *1 C L = 50 pF Notes: R L = 500 Ω 1.CL includes probe and jig capacitance. 2.VTT = VREF = VDDQ × 0.5 7 HD74SSTL16857 Waveforms – 1 VIH CLK input VREF VREF t PLH VIL t PHL VOH Output VREF VREF VOL 0.5 × VDDQ VREF VIH VREF +350 mV (AC voltage levels) VIL VREF –350 mV (AC voltage levels) Waveforms – 2 VIH Timing input VREF tsu VIL th VIH Data input VREF VREF VIL tw VIH Input VREF VREF VIL VREF Notes: 8 VREF +350 mV (AC voltage levels) VIL VREF –350 mV (AC voltage levels) 1.Input waveform : PRR ≤ 10 MHz, Zo = 50 W, tr ≤ 1.25 ns/V, tf ≤ 1.25 ns/V. 2.The output are measured one at a time with one transition per measurement. 3.tPLH and tPHL are the same as propagation delay time. Package Dimensions Unit : mm 0.5 × VDDQ VIH HD74SSTL16857 +0.3 12.50 –0.1 25 6.10 +0.3 –0.1 48 0.20 +0.1 –0.05 0.50 24 0.15 ± 0.05 1 0.08 M 0.05 Min 0.10 1.20 max 0.65 Max 8.10 ± 0.3 10° Max 0.50 ± 0.1 Hitachi code EIAJ code JEDEC code TTP-48DC — — Cautions 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. 9 HD74SSTL16857 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 URL NorthAmerica : http:semiconductor.hitachi.com/ Europe : http://www.hitachi-eu.com/hel/ecg Asia (Singapore) : http://www.has.hitachi.com.sg/grp3/sicd/index.htm Asia (Taiwan) : http://www.hitachi.com.tw/E/Product/SICD_Frame.htm Asia (HongKong) : http://www.hitachi.com.hk/eng/bo/grp3/index.htm Japan : http://www.hitachi.co.jp/Sicd/indx.htm For further information write to: Hitachi Semiconductor (America) Inc. 179 East Tasman Drive, San Jose,CA 95134 Tel: <1> (408) 433-1990 Fax: <1>(408) 433-0223 Hitachi Europe GmbH Electronic components Group Dornacher Straße 3 D-85622 Feldkirchen, Munich Germany Tel: <49> (89) 9 9180-0 Fax: <49> (89) 9 29 30 00 Hitachi Europe Ltd. Electronic Components Group. Whitebrook Park Lower Cookham Road Maidenhead Berkshire SL6 8YA, United Kingdom Tel: <44> (1628) 585000 Fax: <44> (1628) 778322 Hitachi Asia Pte. Ltd. 16 Collyer Quay #20-00 Hitachi Tower Singapore 049318 Tel: 535-2100 Fax: 535-1533 Hitachi Asia Ltd. Taipei Branch Office 3F, Hung Kuo Building. No.167, Tun-Hwa North Road, Taipei (105) Tel: <886> (2) 2718-3666 Fax: <886> (2) 2718-8180 Hitachi Asia (Hong Kong) Ltd. Group III (Electronic Components) 7/F., North Tower, World Finance Centre, Harbour City, Canton Road, Tsim Sha Tsui, Kowloon, Hong Kong Tel: <852> (2) 735 9218 Fax: <852> (2) 730 0281 Telex: 40815 HITEC HX Copyright © Hitachi, Ltd., 1998. All rights reserved. Printed in Japan. 10