Revised November 1999 74ACTQ16373 16-Bit Transparent Latch with 3-STATE Outputs General Description Features The ACTQ16373 contains sixteen non-inverting latches with 3-STATE outputs and is intended for bus oriented applications. The device is byte controlled. The flip-flops appear transparent to the data when the Latch Enable (LE) is HIGH. When LE is low, the data that meets the setup time is latched. Data appears on the bus when the Output Enable (OE) is LOW. When OE is HIGH, the outputs are in high Z state. The ACTQ16373 utilizes Fairchild’s Quiet Series technology to guarantee quiet output switching and improved dynamic threshold performance. FACT Quiet Series features GTO output control for superior performance. ■ Utilizes Fairchild FACT Quiet Series technology ■ Guaranteed simultaneous switching noise level and dynamic threshold performance ■ Guaranteed pin-to-pin output skew ■ Separate control logic for each byte ■ 16-bit version of the ACTQ373 ■ Outputs source/sink 24 mA ■ Additional specs for Multiple Output Switching ■ Output Loading specs for both 50 pF and 250 pF loads Ordering Code: Order Number Package Number 74ACTQ16373MEA MS48A 48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300” Wide Package Description 74ACTQ16373MTD MTD48 48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code. Logic Symbol Connection Diagram Pin Descriptions Pin Names Description OEn Output Enable Input (Active LOW) LEn Latch Enable Input I0–I15 Inputs O0–O15 Outputs FACT, Quiet Series, FACT Quiet Series, and GTO are trademarks of Fairchild Semiconductor Corporation. © 1999 Fairchild Semiconductor Corporation DS010934 www.fairchildsemi.com 74ACTQ16373 16-Bit Transparent Latch with 3-STATE Outputs June 1991 74ACTQ16373 Functional Description Truth Tables The ACTQ16373 contains sixteen D-type latches with 3STATE standard outputs. The device is byte controlled with each byte functioning identically, but independent of the other. Control pins can be shorted together to obtain full 16-bit operation. The following description applies to each byte. When the Latch Enable (LEn) input is HIGH, data on the Dn enters the latches. In this condition the latches are transparent, i.e., a latch output will change states each time its D input changes. When LEn is LOW, the latches store information that was present on the D inputs a setup time preceding the HIGH-to-LOW transition of LEn. The 3STATE standard outputs are controlled by the Output Enable (OEn) input. When OEn is LOW, the standard outputs are in the 2-state mode. When OEn is HIGH, the standard outputs are in the high impedance mode but this does not interfere with entering new data into the latches. Inputs Outputs LE1 OE1 I0–I7 O0–O7 Z X H X H L L L H L H H L L X (Previous) Inputs Outputs LE2 OE2 I8–I15 O8–O15 Z X H X H L L L H L H H L L X (Previous) H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance Previous = previous output prior to HIGH-to-LOW transition of LE Logic Diagrams www.fairchildsemi.com 2 Recommended Operating Conditions −0.5V to +7.0V Supply Voltage (VCC) DC Input Diode Current (IIK) VI = −0.5V −20 mA VI = VCC + 0.5V +20 mA Supply Voltage (VCC) DC Output Diode Current (IOK) VO = −0.5V −20 mA VO = VCC + 0.5V +20 mA DC Output Voltage (VO) +50 mA DC VCC or Ground Current +50 mA +140°C Storage Temperature −65°C to+150°C 0V to VCC −40°C to +85°C Minimum Input Edge Rate (∆V/∆t) 125 mV/ns VIN from 0.8V to 2.0V VCC @ 4.5V, 5.5V Note 1: Absolute maximum ratings are those values beyond which damage to the device may occur. The databook specifications should be met, without exception to ensure that the system design is reliable over its power supply, temperature, and output/input loading variables. Fairchild does not recommend operation of FACT circuits outside databook specifications. per Output Pin Junction Temperature 0V to VCC Output Voltage (VO) Operating Temperature (TA) −0.5V to VCC + 0.5V DC Output Source/Sink Current (IO) 4.5V to 5.5V Input Voltage (VI) DC Electrical Characteristics Symbol VIH VIL VOH Parameter TA = +25°C VCC (V) Typ TA = −40°C to +85°C Units Conditions Guaranteed Limits Minimum HIGH 4.5 1.5 2.0 2.0 Input Voltage 5.5 1.5 2.0 2.0 Maximum LOW 4.5 1.5 0.8 0.8 Input Voltage 5.5 1.5 0.8 0.8 Minimum HIGH 4.5 4.49 4.4 4.4 Output Voltage 5.5 5.49 5.4 5.4 4.5 3.86 3.76 5.5 4.86 4.76 V V V VOUT = 0.1V or VCC − 0.1V VOUT = 0.1V or VCC − 0.1V IOUT = −50 µA VIN = VIL or VIH VOL Maximum LOW 4.5 0.001 0.1 0.1 Output Voltage 5.5 0.001 0.1 0.1 4.5 0.36 0.44 5.5 0.36 0.44 IOH = −24 mA V IOH = −24 mA (Note 2) IOUT = 50 µA V VIN = VIL or VIH IOZ Maximum 3-STATE Leakage Current ± 0.5 ± 5.0 µA ± 0.1 ± 1.0 µA 1.5 mA VI = VCC − 2.1V 80.0 µA VIN = VCC or GND 75 mA VOLD = 1.65V Max −75 mA Maximum Input Leakage Current 5.5 ICCT Maximum ICC/Input 5.5 ICC Max Quiescent Supply Current 5.5 IOLD Minimum Dynamic 5.5 IOHD Output Current (Note 3) VOLP Quiet Output Maximum Dynamic VOL Quiet Output Minimum Dynamic VOL VOHP Maximum Overshoot IOL = 24 mA (Note 2) VI = VIL, VIH 5.5 IIN VOLV IOL = 24 mA V 0.6 8.0 5.0 0.5 0.8 V 5.0 −0.5 −1.0 V 5.0 VOH + 1.0 VOH + 1.5 V VO = VCC, GND VI = VCC, GND VOHD = 3.85V Min Figure 1, Figure 2 (Note 5)(Note 6) Figure 1, Figure 2 (Note 5)(Note 6) Figure 1, Figure 2 (Note 4)(Note 6) VOHV Minimum VCC Droop 5.0 VOH − 1.0 VOH − 1.8 V Figure 1, Figure 2 (Note 4)(Note 6) VIHD Minimum HIGH Dynamic Input Voltage Level 5.0 1.7 2.0 V (Note 4)(Note 7) VILD Maximum LOW Dynamic Input Voltage Level 5.0 1.2 0.8 V (Note 4)(Note 7) Note 2: All outputs loaded; thresholds associated with output under test. Note 3: Maximum test duration 2.0 ms; one output loaded at a time. Note 4: Worst case package Note 5: Maximum number of outputs that can switch simultaneously is n. (n − 1) outputs are switched LOW and one output held LOW. Note 6: Maximum number of outputs that can switch simultaneously is n. (n − 1) outputs are switched HIGH and one output held HIGH. Note 7: Max number of data inputs (n) switching, (n − 1) input switching 0V to 3V. Input under test switching 3V to threshold (VILD) 3 www.fairchildsemi.com 74ACTQ16373 Absolute Maximum Ratings(Note 1) 74ACTQ16373 AC Electrical Characteristics Symbol Parameter VCC TA = +25°C (V) CL = 50 pF (Note 8) tPLH Propagation Delay tPHL Dn to On tPLH Propagation Delay tPHL LE to On tPZH Output Enable tPZL Delay tPHZ Output Disable tPLZ Delay 5.0 5.0 5.0 5.0 Min Typ TA = −40°C to +85°C CL = 50 pF Max Min Units Max 3.1 5.3 7.9 3.1 8.4 2.6 4.6 7.3 2.6 7.8 3.1 5.4 7.9 3.2 8.4 2.8 4.9 7.3 2.8 7.8 2.5 4.7 7.4 2.5 7.9 2.7 4.8 7.5 2.7 8.0 2.1 5.1 7.9 2.1 8.2 2.0 4.5 7.4 2.0 7.9 ns ns ns ns Note 8: Voltage Range 5.0 is 5.0V ± 0.5V. Extended AC Electrical Characteristics Symbol Parameter tPLH Propagation Delay tPHL Data to Output tPLH Propagation Delay tPHL Latch Enable to Output tPZH Output Enable tPZL Time tPHZ Output Disable tPLZ Time tOSHL Pin to Pin Skew (Note 14) HL Data to Output tOSLH Pin to Pin Skew (Note 14) LH Data to Output tOST Pin to Pin Skew (Note 14) LH/HL Data to Output VCC (V) (Note 9) TA = −40°C to +85°C TA = −40°C to +85°C CL = 50 pF CL = 250 pF 16 Outputs Switching (Note 11) Units (Note 10) 5.0V 5.0V 5.0V 5.0V Min Max Min 4.7 12.7 6.6 15.7 4.6 10.6 6.4 14.5 4.6 13.3 6.3 15.3 4.1 10.4 5.8 13.6 3.5 10.4 3.6 10.9 3.4 8.5 3.1 8.1 Max ns ns (Note 12) ns (Note 13) ns 5.0V 1.3 ns 5.0V 2.1 ns 5.0V 4.0 ns Note 9: Voltage Range 5.0 is 5.0V ± 0.5V. Note 10: This specification is guaranteed but not tested. The limits apply to propagation delays for all paths described switching in phase (i.e., all LOW-to-HIGH, HIGH-to-LOW, etc.). Note 11: This specification is guaranteed but not tested. The limits represent propagation delays with 250 pF load capacitors in place of the 50 pF load capacitors in the standard AC load. This specification pertains to single output switching only. Note 12: 3-STATE delays are load dominated and have been excluded from the datasheet. Note 13: The Output Disable Time is dominated by the RC Network (500Ω, 250 pF) on the output and has been excluded from the datasheet. Note 14: Skew is defined as the absolute value of the difference between the actual propagation delays for any two separate outputs of the same device. The specification applies to any outputs switching HIGH-to-LOW (tOSHL), LOW-to-HIGH (tOSLH), or any combination switching LOW-to-HIGH and/or HIGHto-LOW (tOST). www.fairchildsemi.com 4 Symbol Parameter VCC TA = +25°C TA = −40°C to +85°C (V) CL = 50 pF CL = 50 pF (Note 15) tS Setup Time, HIGH or LOW, Input to Clock Hold Time, HIGH or LOW tH Input to Clock tW CS Pulse Width, HIGH or LOW Units Guaranteed Minimum 5.0 3.0 3.0 ns 5.0 1.5 1.5 ns 5.0 4.0 4.0 ns Note 15: Voltage Range 5.0 is 5.0V ± 0.5V Capacitance Typ Units CIN Symbol Input Capacitance Parameter 4.5 pF VCC = 5.0V CPD Power Dissipation Capacitance 30 pF VCC = 5.0V 5 Conditions www.fairchildsemi.com 74ACTQ16373 AC Operating Requirements 74ACTQ16373 FACT Noise Characteristics The setup of a noise characteristics measurement is critical to the accuracy and repeatability of the tests. The following is a brief description of the setup used to measure the noise characteristics of FACT. VOLP/VOLV and VOHP/V OHV: • Determine the quiet output pin that demonstrates the greatest noise levels. The worst case pin will usually be the furthest from the ground pin. Monitor the output voltages using a 50Ω coaxial cable plugged into a standard SMB type connector on the test fixture. Do not use an active FET probe. Equipment: Hewlett Packard Model 8180A Word Generator PC-163A Test Fixture • Measure VOLP and VOLVon the quiet output during the worst case transition for active and enable. Measure VOHP and VOHV on the quiet output during the worst case active and enable transition. Tektronics Model 7854 Oscilloscope Procedure: 1. Verify Test Fixture Loading: Standard Load 50 pF, 500Ω. • Verify that the GND reference recorded on the oscilloscope has not drifted to ensure the accuracy and repeatability of the measurements. 2. Deskew the HFS generator so that no two channels have greater than 150 ps skew between them. This requires that the oscilloscope be deskewed first. It is important to deskew the HFS generator channels before testing. This will ensure that the outputs switch simultaneously. VILD and VIHD: • Monitor one of the switching outputs using a 50Ω coaxial cable plugged into a standard SMB type connector on the test fixture. Do not use an active FET probe. 3. Terminate all inputs and outputs to ensure proper loading of the outputs and that the input levels are at the correct voltage. • First increase the input LOW voltage level, VIL, until the output begins to oscillate or steps out a min of 2 ns. Oscillation is defined as noise on the output LOW level that exceeds VIL limits, or on output HIGH levels that exceed VIH limits. The input LOW voltage level at which oscillation occurs is defined as V ILD. 4. Set the HFS generator to toggle all but one output at a frequency of 1 MHz. Greater frequencies will increase DUT heating and effect the results of the measurement. 5. Set the HFS generator input levels at 0V LOW and 3V HIGH for ACT devices and 0V LOW and 5V HIGH for AC devices. Verify levels with an oscilloscope. • Next decrease the input HIGH voltage level, VIH until the output begins to oscillate or steps out a min of 2 ns. Oscillation is defined as noise on the output LOW level that exceeds VIL limits, or on output HIGH levels that exceed VIH limits. The input HIGH voltage level at which oscillation occurs is defined as V IHD. • Verify that the GND reference recorded on the oscilloscope has not drifted to ensure the accuracy and repeatability of the measurements. Note A: VOHV and VOLP are measured with respect to ground reference. Note B: Input pulses have the following characteristics: f = 1 MHz, tr = 3 ns, tf = 3 ns, skew < 150 ps. FIGURE 1. Quiet Output Noise Voltage Waveforms FIGURE 2. Simultaneous Switching Test Circuit www.fairchildsemi.com 6 74ACTQ16373 Physical Dimensions inches (millimeters) unless otherwise noted 48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300” Wide Package Number MS48A 7 www.fairchildsemi.com 74ACTQ16373 16-Bit Transparent Latch with 3-STATE Outputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide Package Number MTD48 Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. www.fairchildsemi.com www.fairchildsemi.com 8