74ACT16244 16-BIT BUS BUFFER WITH 3 STATE OUTPUTS (NON INVERTED) ■ ■ ■ ■ ■ ■ ■ ■ HIGH SPEED: tPD = 4.8 ns (TYP.) at VCC = 5V LOW POWER DISSIPATION: ICC = 8 µA (MAX.) at TA = 25 oC COMPATIBLE WITH TTL OUTPUTS VIH = 2V (MIN), VIL = 0.8V (MAX) 50Ω 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 SYMBOL 1 1G IEC LOGIC SYMBOLS NAME AND FUNCT ION Output Enable Input 2, 3, 5, 6 1Y1 to 1Y4 Data Outputs 8, 9, 11, 12 2Y1 to 2Y4 Data Outputs 13, 14, 16, 17 3Y1 to 3Y4 Data Outputs 19, 20, 22, 23 4Y1 to 4Y4 Data Outputs 24 4G Output Enable Input 25 3G Output Enable Input 30, 29, 27, 26 4A1 to 4A4 Data Inputs 36, 35, 33, 32 3A1 to 3A4 Data Inputs 41, 40, 38, 37 2A1 to 2A4 Data Inputs 47, 46, 44, 43 1A1 to 1A4 48 2G 4,10, 15, 21, 28, 34, 39, 45 GND Ground (0V) 7, 18, 31, 42 VCC Positive Supply Voltage Data Inputs Output Enable Input TRUTH TABLE INPUT An L L L L H H H X Z X:”H” or ”L” Z: High impedance 2/8 OUTPUT G Yn 74ACT16244 ABSOLUTE MAXIMUM RATINGS Symbol VCC Parameter Supply Voltage Value Unit -0.5 to +7 V VI DC Input Voltage -0.5 to VCC + 0.5 V VO DC Output Voltage -0.5 to VCC + 0.5 V IIK DC Input Diode Current ± 20 mA IOK DC Output Diode Current ± 20 mA IO DC Output Current ± 50 mA DC VCC or Ground Current ± 400 mA ICC orIGND Tstg Storage Temperature TL Lead Temperature (10 sec) -65 to +150 o 300 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 Parameter Supply Voltage Value Unit 4.5 to 5.5 V V VI Input Voltage 0 to VCC VO Output Voltage 0 to VCC Top dt/dv Operating Temperature: Input Rise and Fall Time VCC = 4.5 to 5.5V (note 1) -40 to +85 8 V o C ns/V 1) VIN from 0.8 V to 2.0 V 3/8 74ACT16244 DC SPECIFICATIONS Symb ol Parameter Test Co nditions VIH High Level Input Voltage 4.5 5.5 VIL Low Level Input Voltage 4.5 5.5 VOH VOL High Level Output Voltage Low Level Output Voltage Valu e T A = 25 oC V CC (V) Min. VO = 0.1 V or VCC - 0.1 V Max. Min. 2.0 2.0 2.0 2.0 VO = 0.1 V or VCC - 0.1 V Max. V 0.8 0.8 0.8 0.8 4.5 IO=-50 µA 4.4 4.49 4.4 5.5 IO=-50 µA 5.4 5.49 5.4 4.5 IO=-24 mA 3.94 5.5 IO=-24 mA 4.94 4.5 IO=50 µA 0.001 0.1 0.1 5.5 IO=50 mA 0.001 0.1 0.1 4.5 IO=24 mA 0.36 0.44 V V 3.8 4.8 V 5.5 IO=24 mA 0.36 0.44 Input Leakage Current 5.5 VI = VCC orGND ±0.1 ±1 µA IOZ High Impedance Output Leakage Current 5.5 VI = VIH orVIL VO = VCC orGND ±0.5 ±5 µA ICCT Max ICC /Input 5.5 VI = VCC -2.1V 0.9 1 mA ICC Quiescent Supply Current 5.5 VI = VCC orGND 8 80 µA IOLD Dynamic Output Current (note 1, 2) 5.5 VOLD = 1.65 V max 75 mA VOHD = 3.85 V min -75 mA II IOHD 1) Maximum test duration 2ms, one output loaded attime 2) Incident wave switching is guaranteed on transmission lines with impedances as low as 50 Ω. 4/8 T yp. Un it -40 to 85 o C 74ACT16244 AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 Ω, Input tr = tf =3 ns) Symb ol Parameter T est Con ditio n V CC (V) (*) Valu e T A = 25 oC -40 to 85 o C Min. 2.0 T yp. 3.3 Max. 5.0 Min. 2.0 Max. 6.0 3.0 4.8 6.5 3.0 8.0 Un it tPLH tPHL Propagation Delay Time tPZL tPZH Output Enable Time 5.0(*) 4.0 3.0 6.5 5.5 8.7 7.7 4.0 3.0 9.7 8.8 ns tPLZ tPHZ Output Disable Time 5.0 (*) 4.0 3.0 6.0 4.6 8.0 6.4 4.0 3.0 9.2 7.3 ns 5.0 ns (*) Voltage range is 5V ± 0.5V CAPACITIVE CHARACTERISTICS Symb ol Parameter Test Co nditions V CC (V) CIN Valu e Un it o o -40 to 85 C T A = 25 C Min. T yp. Max. Min. Max. Input Capacitance 5.0 3.6 pF COUT Output Capacitance 5.0 11 pF CPD Power Dissipation Capacitance (note 1) 5.0 42 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 SW IT CH tPLH , tPHL Open tPZL , tPLZ 2VCC tPZH , tPHZ GND CL = 50 pF or equivalent (includes jigand probe capacitance) RL = R1 = 500Ω orequivalent RT = ZOUT of pulse generator (typically 50Ω) 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 DIM. MIN. inch TYP. MAX. A MIN. TYP. 1.1 MAX. 0.433 A1 0.05 0.10 0.15 0.002 0.004 0.006 A2 0.85 0.9 0.95 0.335 0.354 0.374 b 0.17 0.27 0.0067 0.011 c 0.09 0.20 0.0035 0.0079 D 12.4 12.5 12.6 0.408 0.492 0.496 E 7.95 8.1 8.25 0.313 0.319 0.325 E1 6.0 6.1 6.2 0.236 0.240 0.244 e 0.5 BSC 0.0197 BSC K 0o 4o 8o 0o 4o 8o L 0.50 0.60 0.70 0.020 0.024 0.028 A A2 A1 b K e L E c 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 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