74ACT16245 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS (NON INVERTED) ■ ■ ■ ■ ■ ■ ■ HIGH SPEED: tPD = 4.9ns (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 74ACT16245 is an advanced high-speed CMOS 16-BIT BUS TRANSCEIVER (3-STATE) fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS tecnology. This IC is intended for two-way asynchronous communication between data buses and the direction of data transmission is determined by DIR input. The enable inputs G can be used to disable the device so that the buses are effectively isolated. All floating bus terminals during the Z-state must be held HIGH or LOW. 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 74ACT16245TTR PIN CONNECTION 1/8 74ACT16245 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No IEC LOGIC SYMBOLS SYMBOL 1 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, 38 48 4, 10, 15, 21, 28, 34, 39, 45 NAME AND FUNCTION 1DIR Directional Control 1B1 to 1B8 Data Inputs/Outputs 2B1 to 2B8 Data Inputs/Outputs 2DIR Directional Control 2G Output Enable Input 2A1 to 2A8 Data Inputs/Outputs 1A1 to 1A8 Data Inputs/Outputs 1G 7, 18, 31, 42 Output Enable Input GND Ground (0V) VCC Positive Supply Voltage TRUTH TABLE INPUTS FUNCTION G DIR L L H L H X X : Don‘t Care Z : High Impedance 2/8 A BUS B BUS OUTPUT INPUT INPUT OUTPUT Z Z OUTPUT Yn A =B B =A Z 74ACT16245 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 74ACT16245 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 VIIL VO = VCC or GND ± 0.5 ±5 ± 10 µA 1.5 1.6 mA 80 160 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 DisableTime 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. 3.5 4.6 10.5 11.5 4.8 6.5 10.2 11.1 6.1 9.2 11.6 12.6 5.5 8.0 10.0 10.9 5.6 8.3 11.8 12.7 5.0 7.3 12.6 13.4 Unit Max. ns ns ns 74ACT16245 CAPACITIVE CHARACTERISTICS Test Condition Symbol Parameter Value TA = 25°C VCC (V) Min. Typ. Max. -40 to 85°C -55 to 125°C Min. Min. Max. Unit Max. CIN Input Capacitance 5.0 6 pF CI/O I/O Capacitance 5.0 14 pF C PD Power Dissipation Capacitance (note 1) 5.0 24 pF 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 74ACT16245 WAVEFORM 1: PROPAGATION DELAYS (f=1MHz; 50% duty cycle) WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle) 6/8 74ACT16245 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 74ACT16245 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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