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| INTEGRATED CIRCUITS 74F2244 Octal buffer with 30 equivalent output termination (3-State) Product specification IC15 Data Handbook 1994 Dec 5 Philips Semiconductors Philips Semiconductors Product specification Octal buffer with 30 equivalent output termination (3-State) 74F2244 FEATURES * Octal bus interface * 30 output termination ideal for driving DRAM * 15mA source current * SSOP Type II Package DESCRIPTION The 74F2244 is an octal buffer that is ideal for driving dynamic DRAM with matching impedance. The outputs are all capable of sinking 5mA and sourcing up to 15mA. The device features two output enables, OEa and OEb, each controlling four of the 3-state outputs. TYPICAL PROPAGATION DELAY 4.0ns TYPICAL SUPPLY CURRENT (TOTAL) 30mA TYPE 74F2244 ORDERING INFORMATION ORDER CODE DESCRIPTION 20-pin plastic DIP 20-pin plastic SOL 20-pin plastic SSOP Type II COMMERCIAL RANGE VCC = 5V 10%, Tamb = 0C to +70C N74F2244N N74F2244D N74F2244DB DRAWING NUMBER SOT146-1 SOT163-1 SOT339-1 INPUT AND OUTPUT LOADING AND FAN OUT TABLE PINS Ian, Ibn OEa, OEb Data inputs Output enable inputs (active low) DESCRIPTION 74F (U.L.) HIGH/LOW 1.0/0.33 1.0/0.33 LOAD VALUE HIGH/LOW 20A/0.2mA 20A/0.2mA 15mA/5mA Yan, Ybn Data outputs 750/8.33 NOTE: One (1.0) FAST unit load is defined as: 20A in the high state and 0.6mA in the low state. PIN CONFIGURATION OEa 1 Ia0 2 Yb0 3 Ia1 4 Yb1 5 Ia2 6 Yb2 7 Ia3 8 Yb3 9 GND 10 20 VCC 19 OEb 18 Ya0 17 Ib0 16 Ya1 15 Ib1 14 Ya2 13 Ib2 12 Ya3 11 Ib3 LOGIC SYMBOL 2 4 6 8 17 15 13 11 Ia0 1 19 OEa OEb Ia1 Ia2 Ia3 Ib0 Ib1 Ib2 Ib3 Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3 18 VCC = Pin 20 GND = Pin 10 16 14 12 3 5 7 9 SF00227 SF00228 1994 Dec 05 2 853-1525 14380 Philips Semiconductors Product specification Octal buffer with 30 equivalent output termination (3-State) 74F2244 IEC/IEEE SYMBOL 1 19 EN1 EN2 LOGIC DIAGRAM Ia0 2 18 Ya0 Ib0 17 2 Yb0 2 4 6 8 17 15 13 11 2D 1 18 16 14 12 Ia1 4 16 Ya1 Ib1 15 5 Yb1 Ia2 6 14 Ya2 Ib2 13 7 Yb2 2 3 5 7 9 Ia3 8 12 Ya3 Ib3 11 9 Yb3 OEa 1 OEb 10 VCC = Pin 20 GND = Pin 10 SF00229 SF00236 FUNCTION TABLE INPUTS OEa L L H Ia L H X OEb L L H Ib L H X OUTPUTS Ya L H Z Yb L H Z Notes to function table H = High voltage level L = Low voltage level X = Don't care Z = High impedance "off" state ABSOLUTE MAXIMUM RATINGS (Operation beyond the limit set forth in this table may impair the useful life of the device. Unless otherwise noted these limits are over the operating free air temperature range.) SYMBOL VCC VIN IIN VOUT IOUT Tamb Tstg Supply voltage Input voltage Input current Voltage applied to output in high output state Current applied to output in low output state Operating free air temperature range Storage temperature range PARAMETER RATING -0.5 to +7.0 -0.5 to +7.0 -30 to +5 -0.5 to VCC 10 0 to +70 -65 to +150 UNIT V V mA V mA C C RECOMMENDED OPERATING CONDITIONS LIMITS SYMBOL VCC VIH VIL IIk IOH IOL Tamb 1994 Dec 05 Supply voltage High-level input voltage Low-level input voltage Input clamp current High-level output current Low-level output current Operating free air temperature range 0 PARAMETER PARAMETER MIN 4.5 2.0 0.8 -18 -15 5 +70 NOM 5.0 MAX 5.5 V V V mA mA mA UNIT C 3 Philips Semiconductors Product specification Octal buffer with 30 equivalent output termination (3-State) 74F2244 DC ELECTRICAL CHARACTERISTICS (Over recommended operating free-air temperature range unless otherwise noted.) SYMBOL PARAMETER VCC = MIN, VOH High-level output voltage VIL = MAX, VIH = MIN IOH = -15mA TEST CONDITIONS1 IOH = -3mA 10%VC 5%VCC 10%VC 5%VCC 10%VC C C C LIMITS MIN 2.5 2.7 2.0 2.0 0.50 0.42 -0.73 0.50 -1.2 100 20 -0.2 50 -50 -60 20 -150 30 65 3.4 TYP2 MAX UNIT V V V V V V V A A mA A A mA mA mA VOL Low-level output voltage VCC = MIN, VIL = MAX, VIH = MIN, VCC = MIN, II = IIK IOL = MAX 5%VCC VIK II IIH IIL IOZH IOZL IOS ICC Input clamp voltage Input current at maximum input voltage High-level input current Low-level input current Off-state output current, high-level voltage applied Off-state output current, low-level voltage applied Short-circuit output current3 ICCH Supply current (total) ICCL VCC = MAX, VI = 7.0V VCC = MAX, VI = 2.7V VCC = MAX, VI = 0.5V VCC = MAX, VO = 2.7V VCC = MAX, VO = 0.5V VCC = MAX VCC = MAX 45 ICCZ 26 40 mA NOTES: 1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type. 2. All typical values are at VCC = 5V, Tamb = 25C. 3. Not more than one output should be shorted at a time. For testing IOS, the use of high-speed test apparatus and/or sample-and-hold techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting of a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any sequence of parameter tests, IOS tests should be performed last. AC ELECTRICAL CHARACTERISTICS LIMITS Tamb = +25C SYMBOL PARAMETER TEST CONDITION VCC = +5.0V CL = 50pF, RL = 500 MIN tPLH tPHL tPZH tPZL tPHZ tPLZ Propagation delay Ian, Ibn to Yn Output enable time to high or low level Output disable time from high or low level Waveform 1 Waveform 2 Waveform 3 Waveform 2 Waveform 3 3.0 2.5 2.5 3.0 1.5 1.5 TYP 4.5 4.5 4.5 5.0 3.5 2.5 MAX 7.0 7.0 7.5 8.0 6.0 5.5 VCC = +5.0V 10% CL = 50pF, RL = 500 MIN 2.5 2.5 2.0 3.0 1.0 1.0 MAX 8.0 7.5 8.0 8.5 6.0 5.5 ns ns ns Tamb = 0C to +70C UNIT 1994 Dec 05 4 Philips Semiconductors Product specification Octal buffer with 30 equivalent output termination (3-State) 74F2244 AC WAVEFORMS For all waveforms, VM = 1.5V. Ian, Ibn VM VM tPHL OEn VM tPZL VM tPLZ 3.5V tPLH Yn VM VM Yn VM VOL+0.3V SF00234 SF00231 Waveform 1. Propagation delay for data to outputs Waveform 3. 3-State output enable time to low level and output disable time from low level OEn VM VM tPZH tPHZ VOH-0.3V 0V Yn VM SF00233 Waveform 2. 3-State output enable time to high level and output disable time from high level TEST CIRCUIT AND WAVEFORMS SWITCH POSITION TEST SWITCH tPLZ, tPZL closed All other open VIN PULSE GENERATOR RT D.U.T. tTLH (tr ) CL RL POSITIVE PULSE 10% 90% VM tw tTHL (tf ) AMP (V) 90% VM 10% 0V VCC 7.0V 90% NEGATIVE PULSE VM 10% VOUT RL tTHL (tf ) tw VM 10% tTLH (tr ) 0V 90% AMP (V) Test circuit for 3-State outputs DEFINITIONS: RL = Load resistor; see AC electrical characteristics for value. CL = Load capacitance includes jig and probe capacitance; see AC electrical characteristics for value RT = Termination resistance should be equal to ZOUT of pulse generators. Input pulse definition INPUT PULSE REQUIREMENTS family amplitude 74F 3.0V VM 1.5V rep. rate 1MHz tw tTLH tTHL 2.5ns SF000235 500ns 2.5ns 1994 Dec 05 5 Philips Semiconductors Product specification Octal buffer with 30 equivalent output termination (3-State) 74F2244 DIP20: plastic dual in-line package; 20 leads (300 mil) SOT146-1 1994 Dec 05 6 Philips Semiconductors Product specification Octal buffer with 30 equivalent output termination (3-State) 74F2244 SO20: plastic small outline package; 20 leads; body width 7.5 mm SOT163-1 1994 Dec 05 7 Philips Semiconductors Product specification Octal buffer with 30 equivalent output termination (3-State) 74F2244 SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm SOT339-1 1994 Dec 05 8 Philips Semiconductors Product specification Octal buffer with 30 equivalent output termination (3-State) 74F2244 NOTES 1994 Dec 05 9 Philips Semiconductors Product specification Octal buffer with 30 equivalent output termination (3-State) 74F2244 DEFINITIONS Data Sheet Identification Objective Specification Product Status Formative or in Design Definition This data sheet contains the design target or goal specifications for product development. Specifications may change in any manner without notice. This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes at any time without notice, in order to improve design and supply the best possible product. Preliminary Specification Preproduction Product Product Specification Full Production Philips Semiconductors and Philips Electronics North America Corporation reserve the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. LIFE SUPPORT APPLICATIONS Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices, or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088-3409 Telephone 800-234-7381 Philips Semiconductors and Philips Electronics North America Corporation register eligible circuits under the Semiconductor Chip Protection Act. (c) Copyright Philips Electronics North America Corporation 1994 All rights reserved. Printed in U.S.A. (print code) Document order number: Date of release: July 1994 9397-750-05198 |
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