74LVQ244MTR

74LVQ244 LOW VOLTAGE OCTAL BUS BUFFER WITH 3 STATE OUTPUTS (NON INVERTED) ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ HIGH SPEED: tPD =5.6 ns (TYP.) at VCC = 3.3 V COMPATIBLE WITH TTL OUTPUTS LOW POWER DISSIPATION: ICC = 4 µA (MAX.) at TA=25°C LOW NOISE: VOLP = 0.4V (TYP.) at VCC = 3.3V 75Ω TRANSMISSION LINE OUTPUT DRIVE CAPABILITY SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 12mA (MIN) at VCC = 3.0 V PCI BUS LEVELS GUARANTEED AT 24 mA BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL OPERATING VOLTAGE RANGE: VCC(OPR) = 2V to 3.6V (1.2V Data Retention) PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 244 IMPROVED LATCH-UP IMMUNITY DESCRIPTION The 74LVQ244 is a low voltage CMOS OCTAL BUS BUFFER fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS SOP TSSOP Table 1: Order Codes PACKAGE T&R SOP TSSOP 74LVQ244MTR 74LVQ244TTR technology. It is ideal for low power and low noise 3.3V applications. G control output governs four BUS BUFFERs. This device is designed to be used with 3 state memory address drivers, etc. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. Figure 1: Pin Connection And Iec Logic Symbols July 2004 Rev. 7 1/12 74LVQ244 Figure 2: Input And Output Equivalent Circuit Table 2: Pin Description PIN N° SYMBOL 1 2, 4, 6, 8 9, 7, 5, 3 11, 13, 15, 17 18, 16, 14, 12 19 10 20 1G 1A1 to 1A4 2Y1 to 2Y4 2A1 to 2A4 Output Enable Input Data Inputs Data Outputs Data Inputs 1Y1 to 1Y4 Data Outputs 2G GND VCC NAME AND FUNCTION Output Enable Input Ground (0V) Positive Supply Voltage Table 3: Truth Table INPUTS OUTPUT G An Yn L L H L H X L H Z X : Don’t Care Z : High Impedance Table 4: Absolute Maximum Ratings Symbol VCC Parameter Supply Voltage Value Unit -0.5 to +7 V -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 V DC Input Diode Current ± 20 mA IOK DC Output Diode Current ± 20 mA IO DC Output Current ± 50 mA ± 400 mA -65 to +150 °C 300 °C VI DC Input Voltage VO DC Output Voltage IIK ICC or IGND DC VCC or Ground Current Tstg Storage Temperature TL Lead Temperature (10 sec) V Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied Table 5: Recommended Operating Conditions Symbol VCC Parameter Unit Supply Voltage (note 1) 2 to 3.6 V VI Input Voltage 0 to VCC V VO Output Voltage 0 to VCC V Top Operating Temperature dt/dv Input Rise and Fall Time VCC = 3.0V (note 2) 1) Truth Table guaranteed: 1.2V to 3.6V 2) VIN from 0.8V to 2V 2/12 Value -55 to 125 °C 0 to 10 ns/V 74LVQ244 Table 6: DC Specifications Test Condition Symbol VIH VIL VOH Parameter High Level Input Voltage Low Level Input Voltage High Level Output Voltage TA = 25°C VCC (V) Min. Typ. Max. 2.0 3.0 to 3.6 3.0 Value Low Level Output Voltage 3.0 -55 to 125°C Min. Min. 0.8 IO=-50 µA 2.9 IO=-12 mA 2.58 2.99 2.9 2.9 2.48 2.2 IO=50 µA 0.002 0.1 IO=12 mA 0 0.36 Ioz ICC IOLD IOHD Input Leakage Current High Impedance Output Leakage Current Quiescent Supply Current Dynamic Output Current (note 1, 2) V 0.8 2.48 Unit Max. 2.0 0.8 IO=24 mA II Max. 2.0 IO=-24 mA VOL -40 to 85°C V V 2.2 0.1 0.1 0.44 0.44 0.55 0.55 V 3.6 VI = VCC or GND ± 0.1 ±1 ±1 µA 3.6 VI = VIH or VIL VO = VCC or GND ± 0.5 ±5 ± 10 µA 3.6 VI = VCC or GND 4 40 40 µA 3.6 VOLD = 0.8 V max 36 25 mA VOHD = 2 V min -25 -25 mA 1) Maximum test duration 2ms, one output loaded at time 2) Incident wave switching is guaranteed on transmission lines with impedances as low as 75Ω Table 7: 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) Value TA = 25°C VCC (V) Min. 3.3 -0.8 3.3 Typ. Max. 0.4 0.8 -40 to 85°C -55 to 125°C Min. Min. Max. Unit Max. V -0.5 2 V CL = 50 pF 3.3 0.8 V 1) Worst case package. 2) Max number of outputs defined as (n). Data inputs are driven 0V to 3.3V, (n-1) outputs switching and one output at GND. 3) Max number of data inputs (n) switching. (n-1) switching 0V to 3.3V. Inputs under test switching: 3.3V to threshold (VILD), 0V to threshold (VIHD), f=1MHz. 3/12 74LVQ244 Table 8: AC Electrical Characteristics (CL = 50 pF, RL = 500 Ω, Input tr = tf = 3ns) Test Condition Symbol Parameter tPLH tPHL Propagation Delay Time tPZL tPZH Output Enable Time tPLZ tPHZ Output Disable Time tOSLH tOSHL Output To Output Skew Time (note1, 2) Value TA = 25°C VCC (V) Min. Typ. Max. -40 to 85°C -55 to 125°C Min. Min. Max. Max. 2.7 6.6 11 12.5 14 3.3(*) 2.7 5.6 9 10.5 13 8.3 13.5 15 18 3.3(*) 6.8 10 11.5 13 2.7 7.5 12 13.5 15 3.3(*) 6.0 9.0 10.5 12 2.7 0.5 0.5 1.0 1.0 1.0 1.0 1.0 1.0 (*) 3.3 Unit ns ns ns ns 1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switching in the same direction, either HIGH or LOW (tOSLH = |tPLHm - tPLHn|, tOSHL = |tPHLm - tPHLn|) 2) Parameter guaranteed by design (*) Voltage range is 3.3V ± 0.3V Table 9: Capacitive Characteristics Test Condition Symbol Parameter CIN Input Capacitance COUT Output Capacitance Power Dissipation Capacitance (note 1) CPD Value TA = 25°C VCC (V) Min. Typ. Max. -40 to 85°C -55 to 125°C Min. Min. Max. Unit Max. 3.3 4 pF 3.3 8 pF 10 pF 3.3 fIN = 10MHz 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/8 (per circuit) 4/12 74LVQ244 Figure 3: Test Circuit TEST SWITCH tPLH, tPHL Open tPZL, tPLZ 2VCC tPZH, tPHZ Open CL = 50pF or equivalent (includes jig and probe capacitance) RL = R1 = 500Ω or equivalent RT = ZOUT of pulse generator (typically 50Ω) Figure 4: Waveform - Propagation Delays (f=1MHz; 50% duty cycle) 5/12 74LVQ244 Figure 5: Waveform - Output Enable And Disable Time (f=1MHz; 50% duty cycle) 6/12 74LVQ244 SO-20 MECHANICAL DATA DIM. mm. MIN. TYP inch MAX. MIN. TYP. MAX. A 2.35 2.65 0.093 0.104 A1 0.1 0.30 0.004 0.012 B 0.33 0.51 0.013 0.020 C 0.23 0.32 0.009 0.013 D 12.60 13.00 0.496 0.512 E 7.4 7.6 0.291 0.299 e 1.27 0.050 H 10.00 10.65 0.394 0.419 h 0.25 0.75 0.010 0.030 L 0.4 1.27 0.016 0.050 k 0° 8° 0° 8° ddd 0.100 0.004 0016022D 7/12 74LVQ244 TSSOP20 MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. A MIN. TYP. MAX. 1.2 A1 0.05 A2 0.8 b 0.047 0.15 0.002 0.004 0.006 1.05 0.031 0.039 0.041 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0079 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 1 e 0.65 BSC K 0˚ L 0.45 A 0.0256 BSC 0.60 8˚ 0˚ 0.75 0.018 8˚ 0.024 0.030 A2 A1 b K e L E c D E1 PIN 1 IDENTIFICATION 1 0087225C 8/12 74LVQ244 Tape & Reel SO-20 MECHANICAL DATA mm. inch DIM. MIN. A TYP MAX. MIN. 330 MAX. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 TYP. 0.504 30.4 0.519 1.197 Ao 10.8 11 0.425 0.433 Bo 13.2 13.4 0.520 0.528 Ko 3.1 3.3 0.122 0.130 Po 3.9 4.1 0.153 0.161 P 11.9 12.1 0.468 0.476 9/12 74LVQ244 Tape & Reel TSSOP20 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 10/12 TYP 0.504 22.4 0.519 0.882 Ao 6.8 7 0.268 0.276 Bo 6.9 7.1 0.272 0.280 Ko 1.7 1.9 0.067 0.075 Po 3.9 4.1 0.153 0.161 P 11.9 12.1 0.468 0.476 74LVQ244 Table 10: Revision History Date Revision 29-Jul-2004 7 Description of Changes Ordering Codes Revision - pag. 1. 11/12 74LVQ244 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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