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| (R) 74VHCT14A HEX SCHMITT INVERTER PRELIMINARY DATA s s s s s s s s s s HIGH SPEED: tPD = 4 ns (TYP.) at VCC = 5V LOW POWER DISSIPATION: ICC = 2 A (MAX.) at TA = 25 oC TYPICAL HYSTERESIS: 0.7V at VCC = 4.5V POWER DOWN PROTECTION ON INPUTS & OUTPUTS 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 14 IMPROVED LATCH-UP IMMUNITY LOW NOISE: VOLP = 0.8V (Max.) M (Micro Package) T (TSSOP Package) ORDER CODES : 74VHCT14AM 74VHCT14AT Power down protection is provided on all inputs and outputs 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. Pin configuration and function are the same as those of the VHC04 but the VHC14 has hysteresis. This together with its schmitt trigger function allows it to be used on line receivers with slow rise/fall input signals. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. DESCRIPTION The 74VHCT14A is an advanced high-speed CMOS HEX SCHMITT INVERTER fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. The internal circuit is composed of 3 stages including buffer output, which enable high noise immunity and stable output. PIN CONNECTION AND IEC LOGIC SYMBOLS August 1999 1/7 74VHCT14A INPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No 1, 3, 5, 9, 11, 13 2, 4, 6, 8, 10, 12 7 14 SYMBOL 1A to 6A 1Y to 6Y GND VCC NAME AND FUNCT ION Data Inputs Data Outputs Ground (0V) Positive Supply Voltage TRUTH TABLE A L H Y H L ABSOLUTE MAXIMUM RATINGS Symbol VCC VI VO VO IIK IOK IO Tstg TL Supply Voltage DC Input Voltage DC Output Voltage (see note 1) DC Output Voltage (see note 2) DC Input Diode Current DC Output Diode Current DC Output Current Storage Temperature Lead Temperature (10 sec) Parameter Value -0.5 to +7.0 -0.5 to +7.0 -0.5 to +7.0 -0.5 to VCC + 0.5 - 20 20 25 50 -65 to +150 300 Unit V V V V mA mA mA mA o o ICC or IGND DC VCC or Ground Current C C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. 1) VCC =0V 2) High or Low State RECOMMENDED OPERATING CONDITIONS Symbol VCC VI VO VO Top Supply Voltage Input Voltage Output Voltage (see note 1) Output Voltage (see note 2) Operating Temperature Parameter Valu e 4.5 to 5.5 0 to 5.5 0 to 5.5 0 to VCC -40 to +85 Unit V V V V o C 1) VCC =0V 2) High or Low State 2/7 74VHCT14A DC SPECIFICATIONS Symb ol Parameter T est Cond ition s V CC (V) Vt+ VtVh VOH VOL II ICC ICC High Level Threshold Voltage Low Level Threshold Voltage Hysteresis Voltage High Level Output Voltage Low Level Output Voltage Input Leakage Current Quiescent Supply Current Additional Worst Case Supply Current Output Leakage Current 4.5 5.5 4.5 5.5 4.5 5.5 4.5 4.5 4.5 4.5 0 to 5.5 5.5 5.5 I O =-50 A IO=-8 mA I O=50 A IO=8 mA VI = 5.5V or GND VI = VCC or GND One Input at 3.4V, other input at VCC or GND VOUT = 5.5V 0.4 0.4 4.4 3.94 0.0 0.1 0.36 0.1 2 1.35 4.5 Min. 2.0 2.0 0.6 0.6 1.4 1.5 0.4 0.4 4.4 3.8 0.1 0.44 1.0 20 1.5 Typ . Value T A = 25 o C Max. -40 to 85 o C Min . 2.0 2.0 0.6 0.6 1.4 1.5 Max. V V V V V A A mA Un it IOPD 0 0.5 5.0 A AC ELECTRICAL CHARACTERISTICS (Input t r = tf =3 ns) Symb ol Parameter Test Co ndition V CC (*) CL (pF ) (V) 5.0 5.0 15 50 Value T A = 25 o C Min. Typ . 4.0 5.5 Max. 7.0 8.0 Un it -40 to 85 o C Min . 1.0 1.0 Max. 8.0 9.0 tPLH tPHL Propagation Delay Time ns (*) Voltage range is 5V 0.5V CAPACITIVE CHARACTERISTICS Symb ol Parameter T est Cond ition s o Value T A = 25 C Min. Typ . 4 12 Max. 10 -40 to 85 C Min . Max. 10 o Un it C IN CPD Input Capacitance Power Dissipation Capacitance (note 1) 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/6 (per Gate) 3/7 74VHCT14A DYNAMIC SWITCHING CHARACTERISTICS Symb ol Parameter T est Cond ition s V CC (V) VOLP VOLV VIHD VILD Dynamic Low Voltage Quiet Output (note 1, 2) Dynamic High Voltage Input (note 1, 3) Dynamic Low Voltage Input (note 1, 3) 5.0 -0.8 5.0 5.0 C L = 50 pF 2.0 0.6 Min. Typ . 0.3 -0.3 V Value T A = 25 o C Max. 0.8 -40 to 85 o C Min . Max. Un it 1) Worst case package. 2) Max number of outputs defined as (n). Data inputs are driven 0V to 3.0V, (n -1) outputs switching and one output at GND. 3) Max number of data inputs (n) switching. (n-1) switching 0V to3.0V. Inputs under test switching: 3.0V to threshold (VILD), 0V to threshold (VIHD), f=1MHz. TEST CIRCUIT CL = 15/50 pF or equivalent (includes jig and probe capacitance) RT = ZOUT of pulse generator (typically 50) WAVEFORM: PROPAGATION DELAYS (f=1MHz; 50% duty cycle) 4/7 74VHCT14A SO-14 MECHANICAL DATA DIM. MIN. A a1 a2 b b1 C c1 D E e e3 F G L M S 3.8 4.6 0.5 8.55 5.8 1.27 7.62 4.0 5.3 1.27 0.68 8 (max.) 0.149 0.181 0.019 8.75 6.2 0.35 0.19 0.5 45 (typ.) 0.336 0.228 0.050 0.300 0.157 0.208 0.050 0.026 0.344 0.244 0.1 mm TYP. MAX. 1.75 0.2 1.65 0.46 0.25 0.013 0.007 0.019 0.003 MIN. inch TYP. MAX. 0.068 0.007 0.064 0.018 0.010 P013G 5/7 74VHCT14A TSSOP14 MECHANICAL DATA mm MIN. A A1 A2 b c D E E1 e K L 0o 0.50 0.05 0.85 0.19 0.09 4.9 6.25 4.3 5 6.4 4.4 0.65 BSC 4o 0.60 8o 0.70 0o 0.020 0.10 0.9 TYP. MAX. 1.1 0.15 0.95 0.30 0.20 5.1 6.5 4.48 0.002 0.335 0.0075 0.0035 0.193 0.246 0.169 0.197 0.252 0.173 0.0256 BSC 4o 0.024 8o 0.028 0.004 0.354 MIN. inch TYP. MAX. 0.433 0.006 0.374 0.0118 0.0079 0.201 0.256 0.176 DIM. A A2 A1 b e K c L E D E1 PIN 1 IDENTIFICATION 1 6/7 74VHCT14A 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. 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 without express written approval of STMicroelectronics. The ST logo is a trademark of STMicroelectronics (c) 1999 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. http://www.st.com . 7/7 |
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