74VHCT373A OCTAL D-TYPE LATCH WITH 3 STATE OUTPUTS NON INVERTING ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ HIGH SPEED: tPD = 6.4 ns (TYP.) at VCC = 5V LOW POWER DISSIPATION: ICC = 4 µA (MAX.) at TA=25°C COMPATIBLE WITH TTL OUTPUTS: VIH = 2V (MIN.), VIL = 0.8V (MAX) 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 373 IMPROVED LATCH-UP IMMUNITY LOW NOISE: VOLP = 0.9V (MAX.) DESCRIPTION The 74VHCT373A is an advanced high-speed CMOS OCTAL D-TYPE LATCH with 3 STATE OUTPUTS NON INVERTING fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. These 8 bit D-Type latch are controlled by a latch enable input (LE) and an output enable input (OE). While the LE inputs is held at a high level, the Q outputs will follow the data input precisely. When the LE is taken low, the Q outputs will be latched SOP TSSOP Table 1: Order Codes PACKAGE T&R SOP TSSOP 74VHCT373AMTR 74VHCT373ATTR precisely at the logic level of D input data. While the (OE) input is low, the 8 outputs will be in a normal logic state (high or low logic level) and while high level the outputs will be in a high impedance state. 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 since all inputs are equipped with TTL threshold. 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 December 2004 Rev. 4 1/13 74VHCT373A Figure 2: Input Equivalent Circuit Table 2: Pin Description PIN N° SYMBOL 1 OE 2, 5, 6, 9, 12, 15, 16, 19 3, 4, 7, 8, 13, 14, 17, 18 11 10 20 Q0 to Q7 3 State Output Enable Input (Active LOW) 3-State Outputs D0 to D7 Data Inputs LE GND VCC NAME AND FUNCTION Latch Enable Input Ground (0V) Positive Supply Voltage Table 3: Truth Table INPUTS OE LE D Q H L L L X L H H X X L H Z NO CHANGE* L H X : Don’t Care Z : High Impedance * : Q Outputs are latched at the time when the LE input is taken low logic level. Figure 3: Logic Diagram This logic diagram has not be used to estimate propagation delays 2/13 OUTPUT 74VHCT373A Table 4: Absolute Maximum Ratings Symbol VCC 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) -0.5 to VCC + 0.5 V IIK DC Input Diode Current - 20 mA IOK DC Output Diode Current ± 20 mA IO DC Output Current ± 25 mA ICC or IGND DC VCC or Ground Current Tstg Storage Temperature TL Lead Temperature (10 sec) ± 50 mA -65 to +150 °C 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) Output in OFF State 2) High or Low State Table 5: Recommended Operating Conditions Symbol VCC Parameter Supply Voltage Value Unit 4.5 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) Top Operating Temperature dt/dv Input Rise and Fall Time (see note 3) (VCC = 5.0 ± 0.5V) 0 to VCC V -55 to 125 °C 0 to 20 ns/V 1) Output in OFF State 2) High or Low State 3) VIN from 0.8V to 2V 3/13 74VHCT373A Table 6: DC Specifications Test Condition Symbol VIH VIL VOH VOL IOZ II ICC +ICC IOPD Parameter 4.5 to 5.5 4.5 to 5.5 Low Level Output Voltage High Impedance Output Leakage Current Input Leakage Current Quiescent Supply Current Additional Worst Case Supply Current Output Leakage Current TA = 25°C VCC (V) High Level Input Voltage Low Level Input Voltage High Level Output Voltage Value Min. Typ. Max. 2 -40 to 85°C -55 to 125°C Min. Min. Max. 2 0.8 Max. 2 0.8 Unit V 0.8 V 4.5 IO=-50 µA 4.4 4.5 IO=-8 mA 3.94 4.5 IO=50 µA 0.1 0.1 0.1 4.5 IO=8 mA 0.36 0.44 0.55 4.5 to 5.5 VI = VIH or VIL VO = 0V to 5.5 ±0.25 ± 2.5 ± 2.5 µA 0 to 5.5 VI = 5.5V or GND ± 0.1 ± 1.0 ± 1.0 µA 5.5 VI = VCC or GND 4 40 40 µA 5.5 One Input at 3.4V, other input at VCC or GND 1.35 1.5 1.5 mA 0 VOUT = 5.5V 0.5 5.0 5.0 µA 4.5 0.0 4.4 4.4 3.8 3.7 V V Table 7: AC Electrical Characteristics (Input tr = tf = 3ns) Test Condition Symbol Parameter VCC (V) CL (pF) tPLH tPHL (*) tPZL tPZH Propagation Delay Time LE to Q Propagation Delay Time D to Q Output Enable Time 5.0(*) tPLZ tPHZ Output Disable Time tPLH tPHL tw ts th tOSLH tOSHL Value TA = 25°C Min. -55 to 125°C Typ. Max. Min. Max. Min. Max. 15 5.4 12.3 1.0 13.5 1.0 13.5 5.0 50 6.0 13.3 1.0 14.5 1.0 14.5 5.0(*) 15 6.4 8.5 1.0 9.5 1.0 9.5 5.0(*) 50 7.1 9.5 1.0 10.5 1.0 10.5 5.0(*) 15 6.2 10.9 1.0 12.5 1.0 12.5 (*) 5.0 50 6.9 11.9 1.0 13.5 1.0 13.5 5.0(*) 50 6.7 11.2 1.0 12.0 1.0 12.0 RL = 1KΩ RL = 1KΩ Unit ns ns ns ns Pulse Width (LE) HIGH Setup Time D to LE HIGH or LOW Hold Time D to LE HIGH or LOW 5.0(*) 6.5 8.5 8.5 ns 5.0(*) 1.5 1.5 1.5 ns 5.0(*) 3.5 3.5 3.5 ns Output to Output Skew time (note 1) 5.0(*) 50 (*) Voltage range is 5.0V ± 0.5V Note 1: Parameter guaranteed by design. tsoLH = |tpLHm - tpLHn|, tsoHL = |tpHLm - tpHLn| 4/13 -40 to 85°C 1.0 1.0 1.0 ns 74VHCT373A Table 8: Capacitive Characteristics Test Condition Symbol Value TA = 25°C Parameter Min. CIN Input Capacitance COUT Output Capacitance Power Dissipation Capacitance (note 1) CPD Typ. Max. 4 10 -40 to 85°C -55 to 125°C Min. Min. Max. 10 Unit Max. 10 pF 9 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 operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/8 (per Latch) Table 9: 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) TA = 25°C VCC (V) Min. 5.0 5.0 5.0 Value -0.9 CL = 50 pF Typ. Max. 0.6 0.9 -40 to 85°C -55 to 125°C Min. Min. Max. Unit Max. -0.6 2.0 V 0.8 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 to 3.0V. Inputs under test switching: 3.0V to threshold (VILD), 0V to threshold (VIHD), f=1MHz. 5/13 74VHCT373A Figure 4: Test Circuit TEST tPLH, tPHL SWITCH Open tPZL, tPLZ VCC tPZH, tPHZ GND CL =15/50pF or equivalent (includes jig and probe capacitance) RL = R1 = 1KΩ or equivalent RT = ZOUT of pulse generator (typically 50Ω) Figure 5: Waveform - LE To Qn Propagation Delays, LE Minimun Pulse Width, Dn To LE Setup And Hold Times (f=1MHz; 50% duty cycle) 6/13 74VHCT373A Figure 6: Waveform - Output Enable And Disable Times (f=1MHz; 50% duty cycle) Figure 7: Waveform - Propagation Delay Time (f=1MHz; 50% duty cycle) 7/13 74VHCT373A 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 8/13 74VHCT373A 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 9/13 74VHCT373A Tape & Reel SO-20 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 10/13 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 74VHCT373A Tape & Reel TSSOP20 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 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 11/13 74VHCT373A Table 10: Revision History Date Revision 16-Dec-2004 4 12/13 Description of Changes Order Codes Revision - pag. 1. 74VHCT373A 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. 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