74LCX541 OCTAL BUS BUFFER (3-STATE NON INV.) WITH 5V TOLERANT INPUTS AND OUTPUTS ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 5V TOLERANT INPUTS AND OUTPUTS HIGH SPEED: tPD = 6.3 ns (MAX.) at VCC = 3V POWER DOWN PROTECTION ON INPUTS AND OUTPUTS SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 24 mA (MIN) PCI BUS LEVELS GUARANTEED AT 24mA BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL OPERATING VOLTAGE RANGE: VCC (OPR) = 2.0V to 3.6V (1.5V Data Retention) PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 541 LATCH-UP PERFORMANCE EXCEEDS 500mA ESD PERFORMANCE: HBM >2000V; MM > 200V DESCRIPTION The LCX541 is a low voltage CMOS OCTAL BUS BUFFER (3-STATE) fabricated fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. It is ideal for low power and high speed 3.3V applications. it can be interfaced to 5V signal environment for inputs. The 3 STATE control gate operates as a two SOP TSSOP ORDER CODES PACKAGE T UBE T& R SOP 74LCX541AM 74LCX541AMTR TSSOP 74LCX541ATTR input AND such that if either G1 and G2 are high, all eight outputs are in the high impedance state. In order to enhance PC board layout, the LCX541 offers a pinout having inputs and outputs on opposite sides of the package. It has same speed performance at 3.3V than 5V, AC/ACT family, combined with a lower power consumption. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. PIN CONNECTION AND IEC LOGIC SYMBOLS October 2000 1/9 74LCX541 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No SYMBOL TRUTH TABLE NAME AND FUNCT ION 1, 19 G1, G2 Output Enable Input 2, 3, 4, 5, 6, 7, 8, 9 A1 to A8 Data Inputs 18, 17, 16, 15, 14, 13, 12, 11 Y1 to Y8 10 GND Ground (0V) 20 VCC Positive Supply Voltage Data Outputs INPUT OUTPUT G1 G2 An Yn H X X Z X H X Z L L H H L L L L X:”H” or ”L” Z: High impedance ABSOLUTE MAXIMUM RATINGS Symbol 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 (OFF state) -0.5 to + 7.0 V VO DC Output Voltage (High or Low State) (note1) IIK VCC -0.5 to VCC + 0.5 V DC Input Diode Current - 50 mA IOK DC Output Diode Current (note2) ± 50 mA IO DC Output Source/Sink Current ± 50 mA ICC DC Supply Current per Supply Pin ± 100 mA IGND DC Ground Current per Supply Pin ± 100 mA Tstg Storage Temperature TL Lead Temperature (10 sec) -65 to +150 o 300 o 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) IO absolute maximum rating must be observed 2) VO < GND, VO > VCC 2/9 74LCX541 RECOMMENDED OPERATING CONDITIONS Symbol VCC Parameter Supply Voltage (note 1) Value Unit 2.0 to 3.6 V VI Input Voltage 0 to 5.5 V VO Output Voltage (OFF state) 0 to 5.5 V VO Output Voltage (High or Low State) 0 to VCC V ± 24 mA ± 12 mA IOH, IOL High or Low Level Output Current (VCC = 3.0 to 3.6V) IOH, IOL High or Low Level Output Current (VCC = 2.7 to 3.0V) Top dt/dv Operating Temperature: o -40 to+85 Input Transition Rise or Fall Rate (V CC = 3.0V) (note 2) C 0 to 10 ns/V 1) Truth Table guaranteed: 1.5V to3.6V 2) VIN from0.8V to 2.0V DC SPECIFICATIONS Symb ol Parameter Test Co nditi ons VIH High Level Input Voltage VIL Low Level Input Voltage VOH High Level Output Voltage Min. 2.7 to 3.6 VI = VIH or VIL 2.7 to 3.6 2.7 3.0 3.0 II Input Leakage Current IOZ 3 State Output Leakage Current Ioff Power Off Leakage Current ICC Quiescent Supply Current ∆ICC ICC incr. per input Max. V 0.8 3.0 Low Level Output Voltage Un it 2.0 2.7 to 3.6 2.7 VOL Value -40 to 85 o C V CC (V) VI = VIH or VIL IO=-100 µA VCC-0.2 IO=-12 mA 2.2 IO=-18 mA 2.4 IO=-24 mA 2.2 V V IO=100 µA 0.2 IO=12 mA 0.4 IO=16 mA 0.4 IO=24 mA 0.55 V VI = 0 to 5.5 V ±5 µA 2.7 to 3.6 VI = VIH orVIL VO = 0 to 5.5V ±5 µA 0 VI orVO = 5.5V 100 µA 2.7 to 3.6 VI = VCC orGND 10 VI orVO = 3.6 to 5.5V ±10 µA VIH = VCC -0.6V 500 µA 2.7 to 3.6 2.7 to 3.6 DYNAMIC SWITCHING CHARACTERISTICS Symb ol Parameter Test Con dition s VOLP VOLV Dynamic Low Voltage Quiet Output (note 1) 3.3 Value Un it T A = 25 o C V CC (V) Min . CL = 50 pF VIL = 0 V VIH = 3.3V T yp. Max. 0.8 -0.8 V 1) Number ofoutputs defined as ”n”. Measured with”n-1” outputs switching from HIGH to LOW or LOW t o HIGH. The remaining output is measured in the LOW state. 3/9 74LCX541 AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 Ω, Input tr = tf = 2.5 ns) Symb ol Parameter Test Con dition Value -40 to 85 o C Min. Max. 1.5 9.0 V CC (V) tPLH tPHL Propagation Delay Time tPZL tPZH Output Enable Time tPLZ tPHZ Output Disable Time tOSLH tOSHL Output to Output Skew Time (note 1, 2) 2.7 3.0 to 3.6 2.7 3.0 to 3.6 2.7 3.0 to 3.6 1.5 1.5 1.5 1.5 1.5 8.0 9.5 8.5 8.5 7.5 3.0 to 3.6 1.0 Un it ns ns ns ns 1) Skew is defined as the absolute value of the difference between the actual propagation delay for any twooutputs of the same device switching in the same direction, either HIGH or LOW (tOSLH = |tPLHm - tPLHn|, tOSHL = |tPHLm - tpHLn|) 2) Parameter guaranteed by design CAPACITIVE CHARACTERISTICS Symb ol Parameter Test Co nditi ons Valu e Un it o T A = 25 C V CC (V) Min. T yp. Max. Input Capacitance 3.3 VIN = 0 to VCC 6 pF COUT Output Capacitance 3.3 VIN = 0 to VCC 12 pF CPD Power Dissipation Capacitance (note 1) 3.3 fIN = 10MHz VIN = 0 or VCC 25 pF CIN 1) CPD isdefined as the value of the IC’sinternal equivalent capacitance which is calculated fromthe operating current consumption without load. Average operting current can be obtained by the following equation. I CC(opr) = CPD • VCC • fIN + ICC/8 (per Buffer) 4/9 74LCX541 TEST CIRCUIT T EST tPLH , tPHL SW IT CH Open tPZL , tPLZ 6V tPZH , tPHZ GND CL = 50 pF or equivalent (includes jigand probe capacitance) RL = R1 = 500Ω orequivalent RT = ZOUT of pulse generator (typically 50Ω) WAVEFORM 1: PROPAGATION DELAYS (f=1MHz; 50% duty cycle) 5/9 74LCX541 WAVEFORM 2: OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle) 6/9 74LCX541 SO-20 MECHANICAL DATA mm DIM. MIN. TYP. A a1 inch MAX. MIN. TYP. 2.65 0.10 0.104 0.20 a2 MAX. 0.004 0.007 2.45 0.096 b 0.35 0.49 0.013 0.019 b1 0.23 0.32 0.009 0.012 C 0.50 0.020 c1 45 (typ.) D 12.60 13.00 0.496 0.512 E 10.00 10.65 0.393 0.419 e 1.27 0.050 e3 11.43 0.450 F 7.40 7.60 0.291 0.299 L 0.50 1.27 0.19 0.050 M S 0.75 0.029 8 (max.) P013L 7/9 74LCX541 TSSOP20 MECHANICAL DATA mm DIM. MIN. inch TYP. MAX. A MIN. TYP. 1.1 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 0.19 0.30 0.0075 0.0118 c 0.09 0.2 0.0035 0.0079 D 6.4 6.5 6.6 0.252 0.256 0.260 E 6.25 6.4 6.5 0.246 0.252 0.256 E1 4.3 4.4 4.48 0.169 0.173 0.176 e 0.65 BSC 0.0256 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 E1 PIN 1 IDENTIFICATION 1 L E c D 8/9 MAX. 74LCX541 Information furnished is believed to be accurate and reliable. However, STMicroelectronic s 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 withoutexpress written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics 2000 STMicroelectronics – Printed in Italy – All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com . 9/9