N74F244DB,112

INTEGRATED CIRCUITS 74F244/74F244B Octal buffers (3-State) Product specification IC15 Data Handbook Philips Semiconductors 1994 Dec 05 Philips Semiconductors Product specification Octal buffers (3-State) 74F244/74F244B FEATURES DESCRIPTION • Octal bus interface • 3-State output buffer sink 64mA • 15mA source current • Guaranteed output skew less than 2.0ns (74F244B) • Reduced ground bounce (74F244B) • Reduced ICC (74F244B) • Reduced loading (74F244B IIL = 40µA) • Split lead frame offers increased noise immunity (74F244B) • Industrial temperature range available (-40°C to +85°C) for The 74F244 is an octal buffer that is ideal for driving bus lines of buffer memory address registers. The outputs are all capable of sinking 64mA and sourcing up to 15mA, producing very good capacitive drive characteristics. The device features two output enables, OEa and OEb, each controlling four of the 3-State outputs. The 74F244B is functionally equivalent to the 74F244. It has been designed to reduce effects of ground noise. Other advantages are noted in the features. 74F244 • 74F244 available in SSOP Type II package TYPE TYPICAL PROPAGATION DELAY TYPICAL SUPPLY CURRENT (TOTAL) 74F244 4.0ns 53mA 74F244B 4.0ns 33mA ORDERING INFORMATION ORDER CODE COMMERCIAL RANGE INDUSTRIAL RANGE VCC = 5V ±10%, PKG DWG # Tamb = 0°C to +70°C VCC = 5V ±10%, Tamb = -40°C to +85°C DESCRIPTION 20-pin plastic DIP N74F244N, N74F244BN I74F244N SOT146-1 20-pin plastic SOL N74F244D, N74F244BD I74F244D SOT163-1 20-pin plastic SSOP II N74F244DB SOT339-1 INPUT AND OUTPUT LOADING AND FAN OUT TABLE 74F (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW Data inputs (74F244) 1.0/2.67 20µA/1.6mA Data inputs (74F244B) 1.0/0.067 20µA/40µA Output enable inputs (active low) (74F244) 1.0/1.67 20µA/1.0mA PINS Ian, Ibn OEa, OEb Yan, Ybn DESCRIPTION Output enable inputs (active low) (74F244B) 1.0/0.067 20µA/40µA Data outputs 750/106.7 15mA/64mA NOTE: One (1.0) FAST unit load is defined as: 20µA in the high state and 0.6mA in the low state. 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 5 2 2 853-0357 14381 Philips Semiconductors Product specification Octal buffers (3-State) 74F244/74F244B IEC/IEEE SYMBOL FUNCTION TABLE INPUTS 1 EN1 19 EN2 2 2D 18 1 4 16 6 14 2 3 15 5 13 7 11 9 SF00229 LOGIC DIAGRAM Ia0 Ia1 Ia2 Ia3 OEa 2 18 4 16 6 14 8 12 1 Ya0 Ib0 Ya1 Ib1 Ya2 Ib2 Ya3 Ib3 OEb 17 3 15 5 13 7 11 9 Yb0 Yb1 Yb2 Yb3 19 VCC = Pin 20 GND = Pin 10 SF00230 1994 Dec 5 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: H = High voltage level L = Low voltage level X = Don’t care Z = High impedance ”off” state 12 8 17 OUTPUTS 3 Philips Semiconductors Product specification Octal buffers (3-State) 74F244/74F244B 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 PARAMETER RATING UNIT VCC Supply voltage -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 128 mA Commercial range 0 to +70 °C Tamb O Operating ti free f air i temperature t t range Industrial range (74F244 only) -40 to +85 °C Tstg Storage temperature range -65 to +150 °C RECOMMENDED OPERATING CONDITIONS LIMITS SYMBOL PARAMETER MIN NOM MAX 5.0 5.5 UNIT VCC Supply voltage 4.5 VIN 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 64 mA Tamb O Operating ti free f air i temperature t t range 1994 Dec 5 V V Commercial range 0 +70 °C Industrial range (74F244 only) –40 +85 °C 4 Philips Semiconductors Product specification Octal buffers (3-State) 74F244/74F244B DC ELECTRICAL CHARACTERISTICS (Over recommended operating free-air temperature range unless otherwise noted.) SYMBOL High-level output voltage MIN TYP2 UNIT 2.5 VIL = MAX, ±5%VCC 2.7 VIH = MIN ±10%VCC 2.0 V ±5%VCC 2.0 V VCC = MIN, VIL = MAX, IOH = -3mA IOH = -15mA VOL Low-level output voltage VIK Input clamp voltage IOL = MAX VCC = MIN, II = IIK II Input current at maximum input voltage IIH High-level input current IIL Low-level input current IOZH Off-state output current, high-level voltage applied IOZL IOS V 3.4 ±10%VCC V 0.55 V 0.42 0.55 V -0.73 -1.2 V VCC = MAX, VI = 7.0V 100 µA VCC = MAX, VI = 2.7V 20 µA -1.0 mA -1.6 mA -40 µA VCC = MAX, VO = 2.7V 50 µA Off-state output current, low-level voltage applied VCC = MAX, VO = 0.5V -50 µA Short-circuit output current3 VCC = MAX -225 mA 40 60 mA 60 90 mA ICCZ 60 90 mA ICCH 20 30 mA 50 70 mA 29 40 VIH = MIN, ±5%VCC 74F244 OEa, OEb 74F244 Ian, Ibn VCC = MAX, VI = 0.5V 74F244B all inputs ICCH 74F244 ICC MAX ±10%VCC VCC = MIN, VOH LIMITS TEST CONDITIONS1 PARAMETER Supply current (total) 74F244B ICCL ICCL VCC = MAX VCC = MAX ICCZ -100 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. 1994 Dec 5 5 Philips Semiconductors Product specification Octal buffers (3-State) 74F244/74F244B AC ELECTRICAL CHARACTERISTICS FOR 74F244 A PORT LIMITS SYMBOL PARAMETER Tamb = +25°C Tamb = 0°C to +70°C Tamb = -40°C to +85°C VCC = +5.0V CL = 50pF, RL = 500Ω VCC = +5.0V ± 10% CL = 50pF, RL = 500Ω VCC = +5.0V ± 10% CL = 50pF, RL = 500Ω TEST CONDITION MIN TYP MAX MIN MAX MIN MAX UNIT tPLH tPHL Propagation delay Ian, Ibn to Yn Waveform 1 2.5 2.5 4.0 4.0 5.2 5.2 2.0 2.0 6.2 6.5 1.5 2.0 7.0 7.0 ns tPZH tPZL Output enable time to high or low Waveform 2 Waveform 4 2.0 2.0 4.3 5.0 5.7 7.0 2.0 2.0 6.7 8.0 2.0 2.0 8.0 8.5 ns tPHZ tPLZ Output disable time from high or low Waveform 2 Waveform 4 1.5 1.5 2.5 2.5 5.5 5.5 1.0 1.0 6.0 5.5 1.0 1.0 6.0 5.5 ns AC ELECTRICAL CHARACTERISTICS FOR 74F244B 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 UNIT MIN TYP MAX MIN MAX Waveform 1 2.5 2.5 4.5 4.5 5.7 6.0 2.0 2.5 6.2 6.5 ns Output enable time to high or low level Waveform 2 Waveform 4 2.0 3.0 4.0 5.5 6.0 7.5 2.0 3.0 6.5 8.0 ns tPHZ tPLZ Output disable time from high or low level Waveform 2 Waveform 4 1.5 1.5 2.5 2.5 5.5 5.5 1.0 1.0 6.0 5.5 ns tsk(0) Output skew1, 2 Waveform 3 2.0 ns tPLH tPHL Propagation delay Ian, Ibn to Yn tPZH tPZL 1.5 NOTES: 1. |tPN actual - tPM actual| for any output compared to any other output where N and M are either LH or HL. 2. Skew times are valid only under same test conditions (temperature, VCC, loading, etc.,). 1994 Dec 5 6 Philips Semiconductors Product specification Octal buffers (3-State) 74F244/74F244B AC WAVEFORMS For all waveforms, VM = 1.5V. Ian, Ibn VM Yn, Yn VM tPLH VM tsk(0) tPHL Yn VM VM VM Yn, Yn SF00231 SF00232 Waveform 1. Propagation Delay for data to outputs VM OEn Waveform 3. Output skew VM tPZH OEn VM tPHZ tPZL tPLZ 3.5V VOH–0.3V VM Yn VM VM Yn VOL+0.3V 0V SF00233 SF00234 Waveform 2. 3-State output enable time to high level and output disable time from high level Waveform 4. 3-State output enable time to low level and output disable time from low 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 5 7 Philips Semiconductors Product specification Octal buffers (3-State) 74F244/74F244B DIP20: plastic dual in-line package; 20 leads (300 mil) 1994 Dec 05 8 SOT146-1 Philips Semiconductors Product specification Octal buffers (3-State) 74F244/74F244B SO20: plastic small outline package; 20 leads; body width 7.5 mm 1994 Dec 05 9 SOT163-1 Philips Semiconductors Product specification Octal buffers (3-State) 74F244/74F244B SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm 1994 Dec 05 10 SOT339-1 Philips Semiconductors Product specification Octal buffers (3-State) 74F244/74F244B NOTES 1994 Dec 05 11 Philips Semiconductors Product specification Octal buffers (3-State) 74F244/74F244B 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 1996 All rights reserved. Printed in U.S.A. (print code) Document order number: Date of release: October 28, 1991 9397-750-05103 9397-750-05103