74V2G126 DUAL BUS BUFFER (3-STATE) ■ ■ ■ ■ ■ ■ ■ ■ HIGH SPEED: tPD = 3.8ns (TYP.) at VCC = 5V LOW POWER DISSIPATION: ICC = 1µA(MAX.) at TA=25°C HIGH NOISE IMMUNITY: VNIH = V NIL = 28% VCC (MIN.) POWER DOWN PROTECTION ON INPUTS AND OUTPUTS SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 8mA (MIN) at VCC = 4.5V BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL OPERATING VOLTAGE RANGE: VCC(OPR) = 2V to 5.5V IMPROVED LATCH-UP IMMUNITY DESCRIPTION The 74V2G126 is an advanced high-speed CMOS DUAL BUS BUFFER fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS tecnology. 3-STATE control input nG has to be set LOW to place the output into the high impedance state. Power down protection is provided on all inputs and outputs and 0 to 7V can be accepted on SOT23-8L SOT323-8L ORDER CODES PACKAGE T&R SOT23-8L SOT323-8L 74V2G126STR 74V2G126CTR inputs with no regard to the supply voltage. This device can be used to interface 5V to 3V systems and it is ideal for portable applications like personal digital assistant, camcorder and all battery-powered equipment. All inputs and outputs are equipped with protection circuits against static discharge, giving them ESD immunity and transient excess voltage. PIN CONNECTION AND IEC LOGIC SYMBOLS November 2001 1/11 74V2G126 INPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No SYMBOL 1, 7 2, 5 3, 6 4 1G, 2G 1A, 2A 2Y, 1Y GND VCC 8 NAME AND FUNCTION Output Enable Inputs Data Inputs Data Outputs Ground (0V) Positive Supply Voltage TRUTH TABLE A G Y X L H L H H Z L H X: ”H” or ”L” Z: High Impedance ABSOLUTE MAXIMUM RATINGS Symbol V CC 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 (see note 1) -0.5 to +7.0 V VO DC Output Voltage (see note 2) IIK DC Input Diode Current -0.5 to VCC + 0.5 − 20 mA IOK DC Output Diode Current − 20 mA IO DC Output Current ± 25 mA ICC or IGND DC VCC or Ground Current Storage Temperature Tstg TL Lead Temperature (10 sec) V ± 50 mA -65 to +150 °C 260 °C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. 1) Vcc=0V or nG=Vcc(Output in High Impedence state) 2) High or Low State RECOMMENDED OPERATING CONDITIONS Symbol Parameter Unit Supply Voltage 2 to 5.5 V VI Input Voltage 0 to 5.5 V VO Output Voltage (see note 1) 0 to 5.5 V VO Output Voltage (see note 2) 0 to VCC V Top Operating Temperature -55 to 125 °C 0 to 100 0 to 20 ns/V ns/V V CC dt/dv Input Rise and Fall Time (note 3) (VCC = 3.3 ± 0.3V) (VCC = 5.0 ± 0.5V) 1) Vcc=0V or nG=Vcc (Output in High Impedence state) 2) High or Low State 3) VIN from 30% to 70% of VCC 2/11 Value 74V2G126 DC SPECIFICATION Test Condition Symbol VIH V IL VOH VOL I OZ II IOPD ICC Parameter High Level Input Voltage Low Level Input Voltage High Level Ouput Voltage Low Level Output Voltage High Impedance Output Leakage Current Input Leakage Current Power down Output Leakage Current Quiescent Supply Current Value TA = 25°C VCC (V) Min. 2.0 3.0 to 5.5 2.0 3.0 to 5.5 Typ. Max. -40 to 85°C -55 to 125°C Min. Min. Max. 1.5 1.5 1.5 0.7VCC 0.7VCC 0.7VCC Max. V 0.5 0.5 0.5 0.3VCC 0.3VCC 0.3VCC 2.0 IO=-50 µA 1.9 2.0 1.9 1.9 3.0 IO=-50 µA 2.9 3.0 2.9 2.9 4.5 IO=-50 µA 4.4 4.5 4.4 4.4 3.0 IO=-4 mA 2.58 2.48 2.4 4.5 IO=-8 mA 3.94 2.0 IO=50 µA 0.0 0.1 0.1 0.1 3.8 Unit V V 3.7 3.0 IO=50 µA 0.0 0.1 0.1 0.1 4.5 IO=50 µA 0.0 0.1 0.1 0.1 3.0 IO=4 mA 0.36 0.44 0.55 4.5 IO=8 mA 0.36 0.44 0.55 5.5 VI = VIH or VIL VO = 5.5 or GND ±0.25 ± 2.5 ±5 µA 0 to 5.5 VI = 5.5V or GND ± 0.1 ±1 ±1 µA 0 V O = 5.5 0.5 5 10 µA 5.5 VI = VCC or GND 1 10 20 µA V 3/11 74V2G126 AC ELECTRICAL CHARACTERISTICS (Input tr = tf = 3ns) Test Condition Symbol tPLH tPHL Parameter Propagation Delay Time VCC (V) CL (pF) 3.3 (*) (*) (**) Output Disable Time Output Enable Time -55 to 125°C Min. Max. Min. Max. 15 5.1 7.5 1.0 8.5 1.0 9.5 50 5.6 8.0 1.0 9.5 1.0 10.5 15 3.8 5.5 1.0 6.5 1.0 7.5 5.0(**) 50 4.3 6.5 1.0 7.5 1.0 8.5 3.3 (*) 15 R L = 1 KΩ 5.4 8.0 1.0 9.0 1.0 10.0 3.3 (*) 3.3 Min. -40 to 85°C Max. 50 R L = 1 KΩ 7.9 11.5 1.0 12.5 1.0 13.5 (**) 15 R L = 1 KΩ 3.6 5.0 1.0 6.0 1.0 7.0 5.0(**) 50 R L = 1 KΩ 5.1 7.0 1.0 8.0 1.0 9.0 3.3 (*) 15 R L = 1 KΩ 5.4 7.6 1.0 9.5 1.0 10.5 3.3 (*) 50 R L = 1 KΩ 5.9 8.5 1.0 10.0 1.0 11.0 5.0(**) 15 R L = 1 KΩ 3.7 5.9 1.0 7.0 1.0 8.0 5.0(**) 50 R L = 1 KΩ 4.1 6.5 1.0 7.5 1.0 8.5 5.0 tPZL tPZH TA = 25°C Typ. 5.0 tPLZ tPHZ Value Unit ns ns ns (*) Voltage range is 3.3V ± 0.3V (**) Voltage range is 5.0V ± 0.5V CAPACITIVE CHARACTERISTICS Test Condition Symbol Value TA = 25°C Parameter Min. CIN Input Capacitance C OUT Output Capacitance Power Dissipation Capacitance (note 1) C PD Typ. Max. 4 10 -40 to 85°C -55 to 125°C Min. Min. Max. 10 Unit Max. 10 pF 6 pF 14 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 current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/2 4/11 74V2G126 TEST CIRCUIT TEST CIRCUIT TEST SWITCH tPLH, tPHL Open tPZL, tPLZ VCC tPZH, tPHZ GND C L =15/50pF or equivalent (includes jig and probe capacitance) R1 = 1KΩ or equivalent R T = ZOUT of pulse generator (typically 50Ω) WAVEFORM 1 : PROPAGATION DELAYS (f=1MHz; 50% duty cycle) 5/11 74V2G126 WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle) 6/11 74V2G126 SOT23-8L MECHANICAL DATA mm. mils DIM. MIN. TYP MAX. MIN. TYP. MAX. A 0.90 1.45 35.4 57.1 A1 0.00 0.15 0.0 5.9 A2 0.90 1.30 35.4 51.2 b 0.22 0.38 8.6 14.9 C 0.09 0.20 3.5 7.8 D 2.80 3.00 110.2 118.1 E 2.60 3.00 102.3 118.1 E1 1.50 1.75 59.0 68.8 e 0 e1 L 0.35 .65 25.6 1.95 76.7 0.55 13.7 21.6 7/11 74V2G126 SOT323-8L MECHANICAL DATA mm. mils DIM. MIN. MAX. MIN. TYP. MAX. A 0.80 1.10 31.5 43.3 A1 0.00 0.10 0.0 3.9 A2 0.80 1.00 31.5 34.9 b 0.13 0.28 5.1 11.0 C 0.10 0.18 3.9 7.1 D 1.80 2.20 70.9 86.6 E 1.80 2.40 70.9 94.5 E1 1.15 1.35 45.3 53.1 e 0.5 19.7 e1 1.5 59.0 L 8/11 TYP 0.10 0.30 3.9 11.8 74V2G126 Tape & Reel SOT23-xL MECHANICAL DATA mm. inch DIM. MIN. TYP A MAX. MIN. TYP. 180 13.0 7.086 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 MAX. 0.504 0.512 14.4 0.519 0.567 Ao 3.13 3.23 3.33 0.123 0.127 0.131 Bo 3.07 3.17 3.27 0.120 0.124 0.128 Ko 1.27 1.37 1.47 0.050 0.054 0.0.58 Po 3.9 4.0 4.1 0.153 0.157 0.161 P 3.9 4.0 4.1 0.153 0.157 0.161 9/11 74V2G126 Tape & Reel SOT323-xL MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. MIN. TYP. MAX. A 175 180 185 6.889 7.086 7.283 C 12.8 13 13.2 0.504 0.512 0.519 D 20.2 N 59.5 0.795 60 T 10/11 60.5 2.362 14.4 0.567 Ao 2.25 0.088 Bo 2.7 0.106 Ko 1.2 0.047 Po 3.98 4 4.2 0.156 0.157 0.165 P 3.98 4 4.2 0.156 0.157 0.165 74V2G126 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. 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 registered trademark of STMicroelectronics 2001 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. http://www.st.com 11/11