74VHCT16244A 16-BIT BUS BUFFER WITH 3-STATE OUTPUTS (NON INVERTED) ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ HIGH SPEED: tPD = 5.4 ns (TYP.) at VCC = 5V LOW POWER DISSIPATION: ICC = 4 µA (MAX.) at TA=25°C COMPATIBLE WITH TTL OUTPUTS: VIH =2V (MIN.) VIL = 0.8 (MAX.) POWER DOWN PROTECTION ON INPUTS SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 8 mA (MIN) BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL OPERATING VOLTAGE RANGE: VCC(OPR) = 4.5V to 5.5V PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 16244 IMPROVED LATCH-UP IMMUNITY LOW NOISE: VOLP = 0.9V (MAX.) TSSOP ORDER CODES PACKAGE TSSOP TUBE T&R 74VHCT16244ATTR PIN CONNECTION DESCRIPTION The 74VHCT16244A 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. Any nG output control governs four BUS BUFFERS. Output Enable inputs (nG) tied together give full 16 bit operation. When nG is LOW, the outputs are enabled. When nG is HIGH, the output are in high impedance state. The device is designed to be used with 3-state memory address drivers, etc. Power down protection is provided on all inputs and 0 to 7V can be accepted on inputs with no regard to the supply voltage. This device can be used to interface 5V to 3V. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. February 2003 1/9 74VHCT16244A INPUT EQUIVALENT CIRCUIT IEC LOGIC SYMBOLS PIN DESCRIPTION PIN No SYMBOL 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 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 NAME AND FUNCTION GND Ground (0V) 7, 18, 31, 42 VCC Positive Supply Voltage Output Enable Input Data Outputs Data Outputs Data Outputs Data Outputs Output Enable Input Output Enable Input Data Outputs Data Outputs Data Outputs Data Outputs Output Enable Input TRUTH TABLE INPUTS G An Yn L L H L H X L H Z X : Don‘t Care Z : High Impedance 2/9 OUTPUT 74VHCT16244A ABSOLUTE MAXIMUM RATINGS Symbol VCC Parameter Value Unit Supply Voltage -0.5 to +7.0 V VI DC Input Voltage -0.5 to +7.0 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 ± 25 mA ± 75 mA -65 to +150 °C 300 °C ICC or IGND DC VCC or Ground Current Tstg Storage Temperature TL Lead Temperature (10 sec) 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 VCC Parameter Supply Voltage VI Input Voltage VO Output Voltage Top Operating Temperature dt/dv Input Rise and Fall Time (note 1) (Vcc= 5.0±0.5V) Value Unit 4.5 to 5.5 V 0 to 5.5 V 0 to VCC V -55 to 125 °C 0 to 20 ns/V 1) VIN from 0.8V to 2.0V 3/9 74VHCT16244A DC SPECIFICATIONS Test Condition Symbol VIH VIL VOH VOL IOZ II ICC Parameter 4.5 to 5.5 4.5 to 5.5 Low Level Output Voltage High Impedance Output Leakage Current Input Leakage Current Quiescent Supply Current TA = 25°C VCC (V) High Level Input Voltage Low Level Input Voltage High Level Output Voltage Value Min. Typ. Max. 2 -40 to 85°C -55 to 125°C Min. Min. 2 0.8 4.5 IO=-50 µA 4.4 4.5 IO=-8 mA 3.94 4.5 IO=50 µA 4.5 Max. 4.5 0.0 Max. 2 0.8 V 0.8 4.4 4.4 3.8 3.7 Unit V V 0.1 0.1 0.1 IO=8 mA 0.36 0.44 0.55 5.5 VI = VIH or VIL VO = VCC or GND ±0.25 ± 2.5 ± 2.5 µA 0 to 5.5 VI = 5.5V or GND ± 0.1 ±1 ±1 µA 5.5 VI = VCC or GND 4 40 40 µA V AC ELECTRICAL CHARACTERISTICS (Input tr = tf = 3ns) Test Condition Symbol Parameter Value TA = 25°C VCC (*) CL (V) (pF) Min. -40 to 85°C -55 to 125°C Unit Typ. Max. Min. Max. Min. Max. 5.4 7 8.5 9.5 1.0 1.0 9.5 10.5 1.0 1.0 10.0 11.0 ns tPLH tPHL Propagation Delay Time 5.0 5.0 15 50 tPLZ tPHZ Output Disable Time 5.0 5.0 15 50 RL = 1KΩ 7.7 8.2 10.4 11.4 1.0 1.0 12.0 13.0 1.0 1.0 12.0 13.0 ns tPZL tPZH Output Enable Time 5.0 50 RL = 1KΩ 8.8 11.4 1.0 13.0 1.0 13.0 ns (*) Voltage range is 5.0V ± 0.5V CAPACITIVE CHARACTERISTICS Test Condition Symbol Parameter CIN Input Capacitance COUT Output Capacitance Power Dissipation Capacitance (note 1) CPD TA = 25°C VCC (V) 5.0 Value Min. fIN = 10MHz Typ. Max. 4 10 -40 to 85°C -55 to 125°C Min. Min. Max. 10 Unit Max. 10 pF 6 pF 21 pF 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 Latch) 4/9 74VHCT16244A DYNAMIC SWITCHING CHARACTERISTICS Test Condition Symbol VOLP VOLV VIHD VILD Parameter Dynamic Low Voltage Quiet Output (note 1, 2) Dynamic High Voltage Input (note 1, 3) Dynamic Low Voltage Input (note 1, 3) TA = 25°C VCC (V) Min. 5.0 5.0 Value -0.9 CL = 50 pF 5.0 Typ. Max. 0.6 0.9 -40 to 85°C -55 to 125°C Min. Min. Max. Unit Max. V -0.6 3.5 V 1.5 V 1) Worst case package. 2) Max number of outputs defined as (n). Data inputs are driven 0V to 5.0V, (n-1) outputs switching and one output at GND. 3) Max number of data inputs (n) switching. (n-1) switching 0V to 5.0V. Inputs under test switching: 5.0V to threshold (V ILD), 0V to threshold (VIHD), f=1MHz. TEST CIRCUIT TEST SWITCH tPLH, tPHL Open tPZL, tPLZ tPZH, tPHZ VCC GND CL = 15/50 pF or equivalent (includes jig and probe capacitance) RL = R1 = 1KΩ or equivalent RT = ZOUT of pulse generator (typically 50Ω) 5/9 74VHCT16244A WAVEFORM 1: PROPAGATION DELAYS (f=1MHz; 50% duty cycle) WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle) 6/9 74VHCT16244A TSSOP48 MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. A MIN. TYP. 1.2 A1 0.05 0.047 0.15 A2 MAX. 0.002 0.006 0.9 0.035 b 0.17 0.27 0.0067 0.011 c 0.09 0.20 0.0035 0.0079 D 12.4 12.6 0.488 0.496 E 8.1 BSC E1 6.0 0.318 BSC 6.2 e 0.236 0.5 BSC 0.244 0.0197 BSC K 0˚ 8˚ 0˚ 8˚ L 0.50 0.75 0.020 0.030 A A2 A1 b K e L E c D E1 PIN 1 IDENTIFICATION 1 7065588C 7/9 74VHCT16244A Tape & Reel TSSOP48 MECHANICAL DATA mm. inch DIM. MIN. A MAX. MIN. 330 13.2 TYP. MAX. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 8/9 TYP 0.504 30.4 0.519 1.197 Ao 8.7 8.9 0.343 0.350 Bo 13.1 13.3 0.516 0.524 Ko 1.5 1.7 0.059 0.067 Po 3.9 4.1 0.153 0.161 P 11.9 12.1 0.468 0.476 74VHCT16244A 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 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. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. 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