74LCX541 LOW VOLTAGE CMOS OCTAL BUS BUFFER (3-STATE) WITH 5V TOLERANT INPUTS AND OUTPUTS n 5V TOLERANT INPUTS AND OUTPUTS n HIGH SPEED : t = 8.0 ns (MAX.) at V = 3V PD CC n POWER DOWN PROTECTION ON INPUTS AND OUTPUTS n SYMMETRICAL OUTPUT IMPEDANCE: |I | = I = 24mA (MIN) at V = 3V SOP TSSOP OH OL CC n PCI BUS LEVELS GUARANTEED AT 24 mA n BALANCED PROPAGATION DELAYS: t @ t ORDER CODES PLH PHL n OPERATING VOLTAGE RANGE: PACKAGE TUBE T & R V (OPR) = 2.0V to 3.6V (1.5V Data CC SOP 74LCX541M 74LCX541MTR Retention) TSSOP 74LCX541TTR n PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 541 n LATCH-UP PERFORMANCE EXCEEDS The 3 STATE control gate operates as two input 500mA (JESD 17) AND such that if either G1 and G2 are high, all n ESD PERFORMANCE: eight outputs are in the high impedance state. In HBM > 2000V (MIL STD 883 method 3015); order to enhance PC board layout the 74LCX541 MM > 200V offers a pinout having inputs and outputs on opposite sides of the package. DESCRIPTION It has same speed performance at 3.3V than 5V The 74LCX541 is a low voltage CMOS OCTAL AC/ACT family, combined with a lower power BUS BUFFER (NON-INVERTED) fabricated with consumption. sub-micron silicon gate and double-layer metal All inputs and outputs are equipped with wiring C2MOS technology. It is ideal for low power protection circuits against static discharge, giving and high speed 3.3V applications; it can be them 2KV ESD immunity and transient excess interfaced to 5V signal environment for both inputs voltage. and outputs. PIN CONNECTION AND IEC LOGIC SYMBOLS September 2001 1/9

74LCX541 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION TRUTH TABLE PIN No SYMBOL NAME AND FUNCTION INPUT OUTPUT 1, 19 G1, G2 Output Enable Inputs G1 G2 An Yn 2, 3, 4, 5, 6, A1 to A8 Data Inputs H X X Z 7, 8, 9 X H X Z 18, 17, 16, Y1 to Y8 Data Outputs 15, 14, 13, L L H H 12, 11 L L L L 10 GND Ground (0V) X : Don’t Care Z : High Impedance 20 V Positive Supply Voltage CC ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit VCC 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) (note 1) -0.5 to VCC + 0.5 V IIK DC Input Diode Current - 50 mA IOK DC Output Diode Current (note 2) - 50 mA IO DC Output Current – 50 mA ICC DC Supply Current per Supply Pin – 100 mA IGND DC Ground Current per Supply Pin – 100 mA Tstg Storage Temperature -65 to +150 °C TL Lead Temperature (10 sec) 300 °C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied 1) IO absolute maximum rating must be observed 2) V < GND O 2/9

74LCX541 RECOMMENDED OPERATING CONDITIONS Symbol Parameter Value Unit VCC Supply Voltage (note 1) 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 IOH, IOL High or Low Level Output Current (VCC = 3.0 to 3.6V) – 24 mA IOH, IOL High or Low Level Output Current (VCC = 2.7V) – 12 mA Top Operating Temperature -55 to 125 °C dt/dv Input Rise and Fall Time (note 2) 0 to 10 ns/V 1) Truth Table guaranteed: 1.5V to 3.6V 2) V from 0.8V to 2V at V = 3.0V IN CC DC SPECIFICATIONS Test Condition Value Symbol Parameter -40 to 85 °C -55 to 125 °C Unit V CC (V) Min. Max. Min. Max. V High Level Input IH 2.0 2.0 V Voltage 2.7 to 3.6 V Low Level Input IL 0.8 0.8 V Voltage VOH High Level Output 2.7 to 3.6 IO=-100 m A VCC-0.2 VCC-0.2 Voltage 2.7 IO=-12 mA 2.2 2.2 V IO=-18 mA 2.4 2.4 3.0 IO=-24 mA 2.2 2.2 VOL Low Level Output 2.7 to 3.6 IO=100 m A 0.2 0.2 Voltage 2.7 IO=12 mA 0.4 0.4 V IO=16 mA 0.4 0.4 3.0 IO=24 mA 0.55 0.55 I Input Leakage I Current 2.7 to 3.6 VI = 0 to 5.5V – 5 – 5 m A I Power Off Leakage off Current 0 VI or VO = 5.5V 10 10 m A I High Impedance OZ V = V or V Output Leakage 2.7 to 3.6 I IH IL – 5 – 5 m A V = 0 to V Current O CC ICC QCuurieresnctent Supply 2.7 to 3.6 VI = VCC or GND 10 10 m A VI or VO= 3.6 to 5.5V – 10 – 10 D ICC ICC incr. per Input 2.7 to 3.6 VIH = VCC - 0.6V 500 500 m A 3/9

74LCX541 DYNAMIC SWITCHING CHARACTERISTICS Test Condition Value Symbol Parameter V TA = 25 °C Unit CC (V) Min. Typ. Max. VVOOLLPV DOyuntpaumt i(cn Lootew 1 L)evel Quiet 3.3 VIL =C 0LV =, V5I0Hp =F 3.3V -00..88 V 1) Number of outputs defined as "n". Measured with "n-1" outputs switching from HIGH to LOW or LOW to HIGH. The remaining output is measured in the LOW state. AC ELECTRICAL CHARACTERISTICS Test Condition Value Symbol Parameter -40 to 85 °C -55 to 125 °C Unit V C R t = t CC L L s r (V) (pF) (W ) (ns) Min. Max. Min. Max. t t Propagation Delay 2.7 1.5 9.0 1.5 9.0 PLH PHL 50 500 2.5 ns Time 3.0 to 3.6 1.5 8.0 1.5 8.0 t t Output Enable Time 2.7 1.5 9.5 1.5 9.5 PZL PZH 50 500 2.5 ns 3.0 to 3.6 1.5 8.5 1.5 8.5 t t Output Disable Time 2.7 1.5 8.5 1.5 8.5 PLZ PHZ 50 500 2.5 ns 3.0 to 3.6 1.5 7.5 1.5 7.5 t Output To Output 3.0 to 3.6 50 500 2.5 1.0 1.0 ns OSLH t Skew Time (note1, OSHL 2) 1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch- ing in the same direction, either HIGH or LOW (t = | t - t |, t = | t - t |) OSLH PLHm PLHn OSHL PHLm PHLn 2) Parameter guaranteed by design CAPACITIVE CHARACTERISTICS Test Condition Value Symbol Parameter V TA = 25 °C Unit CC (V) Min. Typ. Max. CIN Input Capacitance 3.3 VIN = 0 to VCC 6 pF COUT Output Capacitance 3.3 VIN = 0 to VCC 12 pF C Power Dissipation Capacitance 3.3 f = 10MHz 25 PD IN pF (note 1) V = 0 or V IN CC 1) C is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without PD load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I = C x V x f + I /8 (per buffer) CC(opr) PD CC IN CC 4/9

74LCX541 TEST CIRCUIT TEST SWITCH tPLH, tPHL Open t , t 6V PZL PLZ t , t GND PZH PHZ CL = 50 pF or equivalent (includes jig and probe capacitance) R = R1 = 500W or equivalent L R = Z of pulse generator (typically 50W ) T OUT 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. inch DIM. MIN. TYP MAX. MIN. TYP. MAX. A 2.65 0.104 a1 0.1 0.2 0.004 0.008 a2 2.45 0.096 b 0.35 0.49 0.014 0.019 b1 0.23 0.32 0.009 0.012 C 0.5 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 0.300 L 0.50 1.27 0.020 0.050 M 0.75 0.029 S 8° (max.) PO13L 7/9

74LCX541 TSSOP20 MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. MIN. TYP. MAX. A 1.2 0.047 A1 0.05 0.15 0.002 0.004 0.006 A2 0.8 1 1.05 0.031 0.039 0.041 b 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0089 D 6.4 6.5 6.6 0.252 0.256 0.260 E 6.2 6.4 6.6 0.244 0.252 0.260 E1 4.3 4.4 4.48 0.169 0.173 0.176 e 0.65 BSC 0.0256 BSC K 0° 8° 0° 8° L 0.45 0.60 0.75 0.018 0.024 0.030 A A2 K L A1 b e c E D E1 PIN 1 IDENTIFICATION 1 0087225C 8/9

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