INTEGRATED CIRCUITS 74F2244 Octal buffer with 30Ω equivalent output termination (3-State) Product specification IC15 Data Handbook Philips Semiconductors 1994 Dec 5 Philips Semiconductors Product specification Octal buffer with 30Ω equivalent output termination (3-State) FEATURES 74F2244 DESCRIPTION • Octal bus interface • 30Ω output termination ideal for driving DRAM • 15mA source current • SSOP Type II Package 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. TYPE TYPICAL PROPAGATION DELAY TYPICAL SUPPLY CURRENT (TOTAL) 74F2244 4.0ns 30mA ORDERING INFORMATION ORDER CODE DESCRIPTION COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C DRAWING NUMBER 20-pin plastic DIP N74F2244N SOT146-1 20-pin plastic SOL N74F2244D SOT163-1 20-pin plastic SSOP Type II N74F2244DB SOT339-1 INPUT AND OUTPUT LOADING AND FAN OUT TABLE 74F (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW Data inputs 1.0/0.33 20µA/0.2mA Output enable inputs (active low) 1.0/0.33 20µA/0.2mA Yan, Ybn Data outputs 750/8.33 NOTE: One (1.0) FAST unit load is defined as: 20µA in the high state and 0.6mA in the low state. 15mA/5mA PINS DESCRIPTION Ian, Ibn OEa, OEb PIN CONFIGURATION LOGIC SYMBOL OEa 1 20 VCC Ia0 2 19 OEb Yb0 3 18 Ya0 Ia1 4 17 Ib0 Yb1 5 16 Ya1 1 OEa Ia2 6 15 Ib1 19 OEb Yb2 7 14 Ya2 Ia3 8 13 Ib2 Yb3 9 12 Ya3 GND 10 11 Ib3 4 6 Ia0 Ia1 Ia2 8 17 Ia3 Ib0 15 13 11 Ib1 Ib2 Ib3 Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3 18 16 14 12 3 5 7 9 VCC = Pin 20 GND = Pin 10 SF00228 SF00227 1994 Dec 05 2 2 853-1525 14380 Philips Semiconductors Product specification Octal buffer with 30Ω equivalent output termination (3-State) IEC/IEEE SYMBOL 74F2244 LOGIC DIAGRAM 1 EN1 19 EN2 2 Ia0 2D 4 16 6 14 8 12 2 17 Ia1 18 1 Ia2 3 15 5 13 7 11 9 Ia3 OEa 2 18 4 16 6 14 8 12 Ya0 Ib0 Ya1 Ib1 Ya2 Ib2 Ya3 Ib3 1 OEb 17 2 15 5 13 7 11 9 Yb0 Yb1 Yb2 Yb3 10 VCC = Pin 20 GND = Pin 10 SF00229 SF00236 FUNCTION TABLE INPUTS OUTPUTS OEa Ia OEb Ib Ya Yb L L L L L L L H L H H H H X H X Z 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 RATING UNIT VCC Supply voltage PARAMETER –0.5 to +7.0 V VIN Input voltage –0.5 to +7.0 V IIN Input current –30 to +5 mA VOUT Voltage applied to output in high output state –0.5 to VCC V IOUT Current applied to output in low output state 10 mA Tamb Operating free air temperature range 0 to +70 °C Tstg Storage temperature range –65 to +150 °C RECOMMENDED OPERATING CONDITIONS LIMITS SYMBOL PARAMETER PARAMETER UNIT MIN NOM MAX VCC Supply voltage 4.5 5.0 5.5 VIH High–level input voltage 2.0 VIL Low–level input voltage 0.8 V IIk Input clamp current –18 mA IOH High–level output current –15 mA IOL Low–level output current 5 mA Tamb Operating free air temperature range +70 °C 1994 Dec 05 0 3 V V Philips Semiconductors Product specification Octal buffer with 30Ω equivalent output termination (3-State) 74F2244 DC ELECTRICAL CHARACTERISTICS (Over recommended operating free-air temperature range unless otherwise noted.) SYMBOL TEST PARAMETER VCC = MIN, VOH LIMITS CONDITIONS1 IOH = –3mA MIN ±10%VC TYP2 MAX 2.5 UNIT V C High-level output voltage VIL = MAX, ±5%VCC 2.7 VIH = MIN ±10%VC 2.0 V 2.0 V IOH = –15mA VCC = MIN, VIL = MAX, VOL Low-level output voltage VIK Input clamp voltage VCC = MIN, II = IIK II Input current at maximum input voltage IIH High–level input current IIL 3.4 V C ±5%VCC IOL = MAX ±10%VC 0.50 V 0.42 0.50 V –0.73 -1.2 V VCC = MAX, VI = 7.0V 100 µA VCC = MAX, VI = 2.7V 20 µA Low–level input current VCC = MAX, VI = 0.5V –0.2 mA IOZH Off–state output current, high–level voltage applied VCC = MAX, VO = 2.7V 50 µA IOZL Off–state output current, low–level voltage applied VCC = MAX, VO = 0.5V –50 µA IOS Short–circuit output current3 VCC = MAX -150 mA 20 30 mA ICC Supply current (total) 45 65 mA C ±5%VCC VIH = MIN, -60 ICCH ICCL VCC = MAX 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 = 25°C. 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 = +25°C SYMBOL PARAMETER TEST CONDITION Tamb = 0°C to +70°C VCC = +5.0V CL = 50pF, RL = 500Ω VCC = +5.0V ± 10% CL = 50pF, RL = 500Ω MIN TYP MAX MIN MAX UNIT tPLH tPHL Propagation delay Ian, Ibn to Yn Waveform 1 3.0 2.5 4.5 4.5 7.0 7.0 2.5 2.5 8.0 7.5 ns tPZH tPZL Output enable time to high or low level Waveform 2 Waveform 3 2.5 3.0 4.5 5.0 7.5 8.0 2.0 3.0 8.0 8.5 ns tPHZ tPLZ Output disable time from high or low level Waveform 2 Waveform 3 1.5 1.5 3.5 2.5 6.0 5.5 1.0 1.0 6.0 5.5 ns 1994 Dec 05 4 Philips Semiconductors Product specification Octal buffer with 30Ω equivalent output termination (3-State) 74F2244 AC WAVEFORMS For all waveforms, VM = 1.5V. Ian, Ibn VM OEn VM tPLH VM VM tPZL tPHL tPLZ 3.5V Yn VM VM Yn VM VOL+0.3V SF00234 SF00231 Waveform 3. 3-State output enable time to low level and output disable time from low level Waveform 1. Propagation delay for data to outputs VM OEn VM tPZH tPHZ VOH–0.3V VM Yn 0V 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 7.0V VCC tw 90% NEGATIVE PULSE 90% VM VM 10% VIN RL VOUT PULSE GENERATOR AMP (V) 10% tTHL (tf ) tTLH (tr ) tTLH (tr ) tTHL (tf ) 0V D.U.T. RT CL RL 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. AMP (V) 90% 90% POSITIVE PULSE VM VM 10% 10% tw 0V Input pulse definition INPUT PULSE REQUIREMENTS family 74F amplitude VM rep. rate 3.0V 1.5V 1MHz tw tTLH 500ns 2.5ns tTHL 2.5ns SF000235 1994 Dec 05 5 Philips Semiconductors Product specification Octal buffer with 30Ω equivalent output termination (3-State) DIP20: plastic dual in-line package; 20 leads (300 mil) 1994 Dec 05 6 74F2244 SOT146-1 Philips Semiconductors Product specification Octal buffer with 30Ω equivalent output termination (3-State) SO20: plastic small outline package; 20 leads; body width 7.5 mm 1994 Dec 05 7 74F2244 SOT163-1 Philips Semiconductors Product specification Octal buffer with 30Ω equivalent output termination (3-State) SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm 1994 Dec 05 8 74F2244 SOT339-1 Philips Semiconductors Product specification Octal buffer with 30Ω equivalent output termination (3-State) NOTES 1994 Dec 05 9 74F2244 Philips Semiconductors Product specification Octal buffer with 30Ω equivalent output termination (3-State) 74F2244 DEFINITIONS Data Sheet Identification Product Status Definition Objective Specification Formative or in Design This data sheet contains the design target or goal specifications for product development. Specifications may change in any manner without notice. Preliminary Specification Preproduction Product 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. Product Specification Full Production 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. 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. 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