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| (R) 74ACT16244 16-BIT BUS BUFFER WITH 3 STATE OUTPUTS (NON INVERTED) s s s s s s s s HIGH SPEED: tPD = 4.8 ns (TYP.) at VCC = 5V LOW POWER DISSIPATION: ICC = 8 A (MAX.) at TA = 25 oC COMPATIBLE WITH TTL OUTPUTS VIH = 2V (MIN), VIL = 0.8V (MAX) 50 TRANSMISSION LINE DRIVING CAPABILITY SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 24 mA (MIN) BALANCED PROPAGATION DELAYS: tPLH tPHL OPERATING VOLTAGE RANGE: VCC (OPR) = 4.5V to 5.5V IMPROVED LATCH-UP IMMUNITY TSSOP ORDER CODES PACKAGE TSSOP T UBE T&R 74ACT16244TTR PIN CONNECTION DESCRIPTION The ACT16244 is an advanced CMOS 16-BIT BUS BUFFER (3-STATE) fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. G output control governs four BUS BUFFERs. The device is designed to be used with 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. The device can be used as four 4-bit buffers, two 8-bit buffers, or one 16-bit buffer. The device is designed to interface directly High Speed CMOS systems with TTL, NMOS and CMOS output voltage levels. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. February 2000 1/8 74ACT16244 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No 1 2, 3, 5, 6 8, 9, 11, 12 13, 14, 16, 17 19, 20, 22, 23 24 25 30, 29, 27, 26 36, 35, 33, 32 41, 40, 38, 37 47, 46, 44, 43 48 4,10, 15, 21, 28, 34, 39, 45 7, 18, 31, 42 SYMBOL 1G 1Y1 to 1Y4 2Y1 to 2Y4 3Y1 to 3Y4 4Y1 to 4Y4 4G 3G 4A1 to 4A4 3A1 to 3A4 2A1 to 2A4 1A1 to 1A4 2G GND VCC NAME AND FUNCT ION Output Enable Input Data Outputs Data Outputs Data Outputs Data Outputs Output Enable Input Output Enable Input Data Inputs Data Inputs Data Inputs Data Inputs Output Enable Input Ground (0V) Positive Supply Voltage IEC LOGIC SYMBOLS TRUTH TABLE INPUT G L L H X:"H" or "L" Z: High impedance OUTPUT An L H X Yn L H Z 2/8 74ACT16244 ABSOLUTE MAXIMUM RATINGS Symbol VCC VI VO IIK IOK IO ICC orIGND Tstg TL Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Current DC VCC or Ground Current Storage Temperature Lead Temperature (10 sec) Parameter Value -0.5 to +7 -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 20 20 50 400 -65 to +150 300 Unit V V V mA mA mA mA o o C C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. RECOMMENDED OPERATING CONDITIONS Symbol VCC VI VO Top dt/dv Supply Voltage Input Voltage Output Voltage Operating Temperature: Input Rise and Fall Time VCC = 4.5 to 5.5V (note 1) Parameter Value 4.5 to 5.5 0 to VCC 0 to VCC -40 to +85 8 Unit V V V o C ns/V 1) VIN from 0.8 V to 2.0 V 3/8 74ACT16244 DC SPECIFICATIONS Symb ol Parameter V CC (V) VIH VIL VOH High Level Input Voltage Low Level Input Voltage High Level Output Voltage 4.5 5.5 4.5 5.5 4.5 5.5 4.5 5.5 VOL Low Level Output Voltage 4.5 5.5 4.5 5.5 II IOZ ICCT ICC IOLD IOHD Input Leakage Current High Impedance Output Leakage Current Max ICC /Input Quiescent Supply Current Dynamic Output Current (note 1, 2) 5.5 5.5 5.5 5.5 5.5 VO = 0.1 V or VCC - 0.1 V VO = 0.1 V or VCC - 0.1 V IO=-50 A IO=-50 A IO=-24 mA IO=-24 mA IO=50 A IO=50 mA IO=24 mA IO=24 mA VI = VCC orGND VI = VIH orVIL VO = VCC orGND VI = VCC -2.1V VI = VCC orGND VOLD = 1.65 V max VOHD = 3.85 V min 4.4 5.4 3.94 4.94 0.001 0.001 0.1 0.1 0.36 0.36 0.1 0.5 0.9 8 75 -75 4.49 5.49 Test Co nditions Min. 2.0 2.0 0.8 0.8 4.4 5.4 3.8 4.8 0.1 0.1 0.44 0.44 1 5 1 80 A A mA A mA mA V V T yp. Valu e T A = 25 oC Max. -40 to 85 o C Min. 2.0 2.0 0.8 0.8 Max. V V Un it 1) Maximum test duration 2ms, one output loaded attime 2) Incident wave switching is guaranteed on transmission lines with impedances as low as 50 . 4/8 74ACT16244 AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 , Input tr = tf =3 ns) Symb ol Parameter V CC (V) tPLH tPHL tPZL tPZH tPLZ tPHZ Propagation Delay Time Output Enable Time Output Disable Time 5.0 (*) T est Con ditio n Valu e T A = 25 oC -40 to 85 o C Min. 2.0 3.0 4.0 3.0 4.0 3.0 T yp. 3.3 4.8 6.5 5.5 6.0 4.6 Max. 5.0 6.5 8.7 7.7 8.0 6.4 Min. 2.0 3.0 4.0 3.0 4.0 3.0 Max. 6.0 8.0 9.7 8.8 9.2 7.3 Un it ns ns ns 5.0(*) 5.0 (*) (*) Voltage range is 5V 0.5V CAPACITIVE CHARACTERISTICS Symb ol Parameter V CC (V) CIN COUT CPD Input Capacitance Output Capacitance Power Dissipation Capacitance (note 1) 5.0 5.0 5.0 Test Co nditions o Valu e -40 to 85 C T A = 25 C Min. T yp. Max. Min. Max. 3.6 11 42 o Un it pF pF pF 1) CPD isdefined as the value of the IC'sinternal equivalent capacitance which is calculated fromthe operating current consumption without load. (Referto Test Circuit).Average operating current can be obtained by the following equation. ICC(opr) = CPD * VCC * fIN + ICC/16 (per circuit) TEST CIRCUIT T EST tPLH , tPHL tPZL , tPLZ tPZH , tPHZ CL = 50 pF or equivalent (includes jigand probe capacitance) RL = R1 = 500 orequivalent RT = ZOUT of pulse generator (typically 50) SW IT CH Open 2VCC GND 5/8 74ACT16244 WAVEFORM 1: PROPAGATION DELAYS (f=1MHz; 50% duty cicle) WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cicle) 6/8 74ACT16244 TSSOP48 MECHANICAL DATA mm MIN. A A1 A2 b c D E E1 e K L 0o 0.50 0.05 0.85 0.17 0.09 12.4 7.95 6.0 12.5 8.1 6.1 0.5 BSC 4o 0.60 8o 0.70 0o 0.020 0.10 0.9 TYP. MAX. 1.1 0.15 0.95 0.27 0.20 12.6 8.25 6.2 0.002 0.335 0.0067 0.0035 0.408 0.313 0.236 0.492 0.319 0.240 0.0197 BSC 4o 0.024 8o 0.028 0.004 0.354 MIN. inch TYP. MAX. 0.433 0.006 0.374 0.011 0.0079 0.496 0.325 0.244 DIM. A A2 A1 b e K c L E D E1 PIN 1 IDENTIFICATION 1 7/8 74ACT16244 Information furnished is believed to be accurate and reliable. However, STMicroelectronic s assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems withoutexpress written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics (c) 2000 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com . 8/8 |
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