74ACT16541 16-BIT BUS BUFFER WITH 3-STATE OUTPUTS (NON INVERTED) ■ ■ ■ ■ ■ ■ ■ HIGH SPEED: tPD = 4.8ns (TYP.) at VCC = 5V LOW POWER DISSIPATION: ICC = 8µA(MAX.) at TA=25°C COMPATIBLE WITH TTL OUTPUTS VIH = 2V (MIN.), VIL = 0.8V (MAX.) 50Ω TRANSMISSION LINE DRIVING CAPABILITY SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 24mA (MIN) OPERATING VOLTAGE RANGE: VCC (OPR) = 4.5V to 5.5V IMPROVED LATCH-UP IMMUNITY DESCRIPTION The 74ACT16541 is an advanced high-speed CMOS 16-BIT BUS BUFFER (3-STATE) fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS tecnology. This is composed of two 8-bit sections with separate output-enable signals. For either 8-bit buffers section, the 3 STATE control gate operates as a two input AND such that if either nG1 and nG2 are high, all outputs are in the high impedence state. This device is designed to interface directly High Speed CMOS systems with TTL and NMOS components. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. April 2001 TSSOP ORDER CODES PACKAGE TSSOP TUBE T &R 74ACT16373TTR PIN CONNECTION 1/8 74ACT16541 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION IEC LOGIC SYMBOLS PIN No SYMBOL NAME QND FUNCTION 1, 48 2, 3, 5, 6, 8, 9, 11, 12 13, 14, 16, 17, 19, 20, 22, 23 24, 25 36, 35, 33, 32, 30, 29, 27, 26 47, 46, 44, 43, 41, 40, 38, 37 4, 10, 15, 21, 28, 34, 39, 45 7, 18, 31, 42 1G1, 1G2 1Y1 to 1Y8 Output Enable Inputs Data Outputs 2Y1 to 2Y8 Data Outputs 2G1, 2G2 2A1 to 2A8 Output Enable Inputs Data Outputs 1A1 to 1A8 Data Outputs GND Ground (0V) V CC Positive Supply Voltage TRUTH TABLE INPUTS G1 G2 An Yn H X L L X H L L X X H L Z Z H L X : Don‘t Care” Z : High Impedance 2/8 OUTPUT 74ACT16541 ABSOLUTE MAXIMUM RATINGS Symbol V CC Parameter Supply Voltage Value Unit -0.5 to +7 V -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 V DC Input Diode Current ± 20 mA IOK DC Output Diode Current ± 20 mA IO DC Output Current VI DC Input Voltage VO DC Output Voltage IIK ICC or IGND DC VCC or Ground Current Tstg Storage Temperature TL Lead Temperature (10 sec) V ± 50 mA ± 400 mA -65 to +150 °C 300 °C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. RECOMMENDED OPERATING CONDITIONS Symbol Value Unit Supply Voltage 4.5 to 5.5 V VI Input Voltage 0 to VCC V VO Output Voltage 0 to VCC V Top Operating Temperature -55 to 125 °C 8 ns/V V CC dt/dv Parameter Input Rise and Fall Time VCC = 4.5 to 5.5V (note 1) 1) VIN from 0.8V to 2.0V 3/8 74ACT16541 DC SPECIFICATIONS Test Condition Symbol Parameter Value TA = 25°C VCC (V) 1.5 2.0 2.0 1.5 2.0 VO = 0.1 V or VCC-0.1V V IL Low Level Input Voltage 4.5 5.5 VO = 0.1 V or VCC-0.1V VOH High Level Output Voltage 4.5 IO=-50 µA 4.4 4.49 5.5 IO=-50 µA 5.4 5.49 4.5 IO =-24 mA 3.86 4.86 II I OZ ICCT Input Leakage Current High Impedance Output Leakege Current Max ICC/Input 1.5 1.5 0.8 0.8 Max. Unit Max. 2.0 2.0 0.8 0.8 V 0.8 0.8 4.4 4.4 5.4 5.4 3.76 3.7 V 5.5 IO =-24 mA 4.5 IO=50 µA 0.001 0.1 0.1 0.1 5.5 IO=50 µA 0.001 0.1 0.1 0.1 4.76 4.7 V 4.5 IO =24 mA 0.36 0.44 0.5 5.5 IO =24 mA 0.36 0.44 0.5 5.5 VI = VCC or GND ± 0.1 ±1 ±1 µA 5.5 VI = VIH or VIL VO = VCC or GND ± 0.5 ±5 ±5 µA 1.5 1.6 mA 80 80 µA VOLD = 1.65 V max 75 50 mA VOHD = 3.85 V min -75 -50 mA 5.5 VI = VCC - 2.1V ICC Quiescent Supply Current 5.5 VI = VCC or GND IOLD Dynamic Output Current (note 1, 2) 5.5 IOHD Min. 2.0 5.5 Low Level Output Voltage Min. Typ. 4.5 VOL -55 to 125°C Min. High Level Input Voltage VIH Max. -40 to 85°C 0.6 8 1) Maximum test duration 2ms, one output loaded at time 2) Incident wave switching is guaranteed on transmission lines with impedances as low as 50Ω AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 Ω, Input tr = tf = 3ns) Test Condition Symbol Parameter tPLH Propagation Delay Time 5.0 (*) Output Enable Time 5.0 (*) Output Disable Time 5.0 (*) tPHL tPZL tPZH tPLZ tPHZ (*) Voltage range is 5.0V ± 0.5V 4/8 VCC (V) Value TA = 25°C Min. -40 to 85°C -55 to 125°C Min. Min. Typ. Max. Max. 3.1 4.6 9 9 4.8 6.8 9.2 9.2 6.5 9.2 11.0 11.0 5.7 8.0 10.0 10.0 6.0 7.9 10.7 10.7 5.3 6.8 9.7 9.7 Unit Max. ns ns ns 74ACT16541 CAPACITIVE CHARACTERISTICS Test Condition Symbol CIN C OUT C PD Parameter Input Capacitance Output Capacitance Power Dissipation Capacitance (note 1) Value TA = 25°C VCC (V) Min. Typ. Max. -40 to 85°C -55 to 125°C Min. Min. Max. Unit Max. 5.0 3.7 pF 5.0 13 pF 25 pF 5.0 fIN = 10MHz 1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/16 (per circuit) TEST CIRCUIT Test Switch tPLH, tPHL Open tPZL, tPLZ 2VCC tPZH, tPHZ GND C L = 50pF or equivalent (includes jig and probe capacitance) R L = R1 = 500Ω or equivalent R T = ZOUT of pulse generator (typically 50Ω) 5/8 74ACT16541 WAVEFORM 1: PROPAGATION DELAYS (f=1MHz; 50% duty cycle) WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIMES (f=1MHz; 50% duty cycle) 6/8 74ACT16541 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 74ACT16541 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringe ment of patents or other righ ts 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. Specifications mentioned in this pub lication are subject to change without notice. Thi s pub lication supersedes and replaces all information previously supplied. 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