OCTAL TRANSPARENT LATCH WITH 3-STATE OUTPUTS The MC74AC373/74ACT373 consists of eight latches with 3-state outputs for bus organized system applications. The flip-flops appear transparent to the data when 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 bus output is in the high impedance state. * * * * Eight Latches in a Single Package 3-State Outputs for Bus Interfacing Outputs Source/Sink 24 mA ACT373 Has TTL Compatible Inputs VCC O7 D7 D6 O6 O5 D5 D4 O4 LE 20 19 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 9 10 OE O0 D0 D1 O1 O2 D2 D3 O3 GND N SUFFIX CASE 738-03 PLASTIC DW SUFFIX CASE 751D-04 PLASTIC PIN NAMES D0-D7 LE OE O0-O7 LOGIC SYMBOL Data Inputs Latch Enable Input Output Enable Input 3-State Latch Outputs D0 D1 D2 D3 D4 D5 D6 D7 LE OE O0 O1 O2 O3 O4 O5 O6 O7 TRUTH TABLE Inputs Outputs OE LE Dn On H L L L X H H L X L H X Z L H O0 H = HIGH Voltage Level L = LOW Voltage Level Z = High Impedance X = Immaterial O0 = Previous O0 before LOW-to-HIGH Transition of Clock FACT DATA 5-1 MC74AC373 MC74ACT373 FUNCTIONAL DESCRIPTION The MC74AC373/74ACT373 contains eight D-type latches with 3-state standard outputs. When the Latch Enable (LE) input is HIGH, data on the Dn inputs enters the latches. In this condition the latches are transparent, i.e., a latch output will change state each time its D input changes. When LE is LOW, the latches store the information that was present on the D inputs a setup time preceding the HIGH-to-LOW transition of LE. The 3-state standard outputs are controlled by the Output Enable (OE) input. When OE is LOW, the standard outputs are in the 2-state mode. When OE is HIGH, the standard outputs are in the high impedance mode but this does not interfere with entering new data into the latches. LOGIC DIAGRAM D0 D1 D D2 D G O D3 D G O D4 D G O D5 D G O D6 D G O D7 D G O D G O G O LE OE O0 O1 O2 O3 O4 O5 Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. FACT DATA 5-2 O6 O7 MC74AC373 MC74ACT373 MAXIMUM RATINGS* Symbol Parameter Value Unit -0.5 to +7.0 V V VCC DC Supply Voltage (Referenced to GND) Vin DC Input Voltage (Referenced to GND) -0.5 to VCC +0.5 Vout DC Output Voltage (Referenced to GND) -0.5 to VCC +0.5 V Iin DC Input Current, per Pin 20 mA Iout DC Output Sink/Source Current, per Pin 50 mA ICC DC VCC or GND Current per Output Pin 50 mA Tstg Storage Temperature -65 to +150 C * Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended Operating Conditions. RECOMMENDED OPERATING CONDITIONS Symbol Parameter VCC Supply Voltage Vin, Vout DC Input Voltage, Output Voltage (Ref. to GND) tr, tf Input Rise and Fall Time (Note 1) AC Devices except Schmitt Inputs tr, tf Input Rise and Fall Time (Note 2) ACT Devices except Schmitt Inputs TJ Junction Temperature (PDIP) TA Operating Ambient Temperature Range IOH IOL Min Typ Max AC 2.0 5.0 6.0 ACT 4.5 5.0 5.5 0 VCC VCC @ 3.0 V 150 VCC @ 4.5 V 40 VCC @ 5.5 V 25 VCC @ 4.5 V 10 VCC @ 5.5 V 8.0 Unit V V ns/V ns/V 140 C 85 C Output Current -- High -24 mA Output Current -- Low 24 mA -40 1. Vin from 30% to 70% VCC; see individual Data Sheets for devices that differ from the typical input rise and fall times. 2. Vin from 0.8 V to 2.0 V; see individual Data Sheets for devices that differ from the typical input rise and fall times. FACT DATA 5-3 25 MC74AC373 MC74ACT373 DC CHARACTERISTICS Symbol Parameter VCC (V) 74AC 74AC TA = +25C TA = -40C to +85C Typ VIH VIL VOH Conditions Guaranteed Limits Minimum High Level Input Voltage 3.0 4.5 5.5 1.5 2.25 2.75 2.1 3.15 3.85 2.1 3.15 3.85 V VOUT = 0.1 V or VCC - 0.1 V Maximum Low Level Input Voltage 3.0 4.5 5.5 1.5 2.25 2.75 0.9 1.35 1.65 0.9 1.35 1.65 V VOUT = 0.1 V or VCC - 0.1 V Minimum High Level Output Voltage 3.0 4.5 5.5 2.99 4.49 5.49 2.9 4.4 5.4 2.9 4.4 5.4 V 2.56 3.86 4.86 2.46 3.76 4.76 0.1 0.1 0.1 0.1 0.1 0.1 3.0 4.5 5.5 0.36 0.36 0.36 0.44 0.44 0.44 3.0 4.5 5.5 VOL Unit Maximum Low Level Output Voltage 3.0 4.5 5.5 0.002 0.001 0.001 IOUT = -50 A V *VIN = VIL or VIH -12 mA IOH -24 mA -24 mA IOUT = 50 A V V *VIN = VIL or VIH 12 mA IOL 24 mA 24 mA IIN Maximum Input Leakage Current 5.5 0.1 1.0 A VI = VCC, GND IOZ Maximum 3-State Current 5.5 0.5 5.0 A VI (OE) = VIL, VIH VI = VCC, GND VO = VCC, GND 5.5 75 mA VOLD = 1.65 V Max 5.5 -75 mA VOHD = 3.85 V Min 80 A VIN = VCC or GND IOLD IOHD ICC Minimum Dynamic Output Current Maximum Quiescent Supply Current 5.5 8.0 * All outputs loaded; thresholds on input associated with output under test. Maximum test duration 2.0 ms, one output loaded at a time. Note: IIN and ICC @ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V VCC. FACT DATA 5-4 MC74AC373 MC74ACT373 AC CHARACTERISTICS (For Figures and Waveforms -- See Section 3) Symbol Parameter VCC* (V) 74AC 74AC TA = +25C CL = 50 pF TA = -40C to +85C CL = 50 pF Min Typ Max Min Max Unit Fig. No. tPLH Propagation Delay Dn to On 3.3 5.0 1.5 1.5 10 7.0 13.5 9.5 1.5 1.5 15 10.5 ns 3-5 tPHL Propagation Delay Dn to On 3.3 5.0 1.5 1.5 9.5 7.0 13 9.5 1.5 1.5 14.5 10.5 ns 3-5 tPLH Propagation Delay LE to On 3.3 5.0 1.5 1.5 10 7.5 13.5 9.5 1.5 1.5 15 10.5 ns 3-6 tPHL Propagation Delay LE to On 3.3 5.0 1.5 1.5 9.5 7.0 12.5 9.5 1.5 1.5 14 10.5 ns 3-6 tPZH Output Enable Time 3.3 5.0 1.5 1.5 9.0 7.0 11.5 8.5 1.0 1.0 13 9.5 ns 3-7 tPZL Output Enable Time 3.3 5.0 1.5 1.5 8.5 6.5 11.5 8.5 1.0 1.0 13 9.5 ns 3-8 tPHZ Output Disable Time 3.3 5.0 1.5 1.5 10 8.0 12.5 11 1.0 1.0 14.5 12.5 ns 3-7 tPLZ Output Disable Time 3.3 5.0 1.5 1.5 8.0 6.5 11.5 8.5 1.0 1.0 12.5 10 ns 3-8 Unit Fig. No. * Voltage Range 3.3 V is 3.3 V 0.3 V. Voltage Range 5.0 V is 5.0 V 0.5 V. AC OPERATING REQUIREMENTS Symbol Parameter VCC* (V) Typ 74AC 74AC TA = +25C CL = 50 pF TA = -40C to +85C CL = 50 pF Guaranteed Minimum ts Setup Time, HIGH or LOW Dn to LE 3.3 5.0 3.5 2.0 5.5 4.0 6.0 4.5 ns 3-9 th Hold Time, HIGH or LOW Dn to LE 3.3 5.0 -3.0 -1.5 1.0 1.0 1.0 1.0 ns 3-9 tw LE Pulse Width, HIGH 3.3 5.0 4.0 2.0 5.5 4.0 6.0 4.5 ns 3-6 * Voltage Range 3.3 V is 3.3 V 0.3 V. Voltage Range 5.0 V is 5.0 V 0.5 V. FACT DATA 5-5 MC74AC373 MC74ACT373 DC CHARACTERISTICS Symbol Parameter VCC (V) 74ACT 74ACT TA = +25C TA = -40C to +85C Typ Guaranteed Limits Unit Conditions VIH Minimum High Level Input Voltage 4.5 5.5 1.5 1.5 2.0 2.0 2.0 2.0 V VOUT = 0.1 V or VCC - 0.1 V VIL Maximum Low Level Input Voltage 4.5 5.5 1.5 1.5 0.8 0.8 0.8 0.8 V VOUT = 0.1 V or VCC - 0.1 V VOH Minimum High Level Output Voltage 4.5 5.5 4.49 5.49 4.4 5.4 4.4 5.4 V 3.86 4.86 3.76 4.76 0.1 0.1 0.1 0.1 4.5 5.5 0.36 0.36 0.44 0.44 V *VIN = VIL or VIH 24 mA IOL 24 mA 0.1 1.0 A VI = VCC, GND 1.5 mA VI = VCC - 2.1 V 5.0 A VI (OE) = VIL, VIH VI = VCC, GND VO = VCC, GND 5.5 75 mA VOLD = 1.65 V Max 5.5 -75 mA VOHD = 3.85 V Min 80 A VIN = VCC or GND 4.5 5.5 VOL Maximum Low Level Output Voltage 4.5 5.5 IIN Maximum Input Leakage Current 5.5 ICCT Additional Max. ICC/Input 5.5 IOZ Maximum 3-State Current 5.5 IOLD IOHD ICC Minimum Dynamic Output Current Maximum Quiescent Supply Current 0.001 0.001 0.6 0.5 5.5 8.0 * All outputs loaded; thresholds on input associated with output under test. Maximum test duration 2.0 ms, one output loaded at a time. FACT DATA 5-6 V V IOUT = -50 A *VIN = VIL or VIH -24 mA IOH -24 mA IOUT = 50 A MC74AC373 MC74ACT373 AC CHARACTERISTICS (For Figures and Waveforms -- See Section 3) Symbol Parameter VCC* (V) 74ACT 74ACT TA = +25C CL = 50 pF TA = -40C to +85C CL = 50 pF Min Typ Max Min Max Unit Fig. No. tPLH Propagation Delay Dn to On 5.0 2.5 8.5 10 1.5 11.5 ns 3-5 tPHL Propagation Delay Dn to On 5.0 2.0 8.0 10 1.5 11.5 ns 3-5 tPLH Propagation Delay LE to On 5.0 2.5 8.5 11 2.0 11.5 ns 3-6 tPHL Propagation Delay LE to On 5.0 2.0 8.0 10 1.5 11.5 ns 3-6 tPZH Output Enable Time 5.0 2.0 8.0 9.5 1.5 10.5 ns 3-7 tPZL Output Enable Time 5.0 2.0 7.5 9.0 1.5 10.5 ns 3-8 tPHZ Output Disable Time 5.0 2.5 9.0 11 2.5 12.5 ns 3-7 tPLZ Output Disable Time 5.0 1.5 7.5 8.5 1.0 10 ns 3-8 Unit Fig. No. * Voltage Range 5.0 V is 5.0 V 0.5 V. AC OPERATING REQUIREMENTS Symbol Parameter VCC* (V) 74ACT 74ACT TA = +25C CL = 50 pF TA = -40C to +85C CL = 50 pF Typ Guaranteed Minimum ts Setup Time, HIGH or LOW Dn to LE 5.0 3.0 7.0 8.0 ns 3-9 th Hold Time, HIGH or LOW Dn to LE 5.0 0 0 1.0 ns 3-9 tw LE Pulse Width, HIGH 5.0 2.0 2.0 8.0 ns 3-6 * Voltage Range 5.0 V is 5.0 V 0.5 V. CAPACITANCE Symbol Parameter Value Typ Unit Test Conditions CIN Input Capacitance 4.5 pF VCC = 5.0 V CPD Power Dissipation Capacitance 40 pF VCC = 5.0 V FACT DATA 5-7 MC74AC373 MC74ACT373 OUTLINE DIMENSIONS N SUFFIX PLASTIC DIP PACKAGE CASE 738-03 ISSUE E -A- 20 11 1 10 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. B L C -T- K SEATING PLANE M N E G F J D 20 PL 0.25 (0.010) 20 PL 0.25 (0.010) M T A M M DW SUFFIX PLASTIC SOIC PACKAGE CASE 751D-04 ISSUE E -A- 20 11 -B- 10X P 0.010 (0.25) 1 M B M 10 20X J D 0.010 (0.25) M T A B S S F R X 45 _ C -T- 18X G SEATING PLANE K T B M DIM A B C D E F G J K L M N INCHES MIN MAX 1.010 1.070 0.240 0.260 0.150 0.180 0.015 0.022 0.050 BSC 0.050 0.070 0.100 BSC 0.008 0.015 0.110 0.140 0.300 BSC 0_ 15 _ 0.020 0.040 MILLIMETERS MIN MAX 25.66 27.17 6.10 6.60 3.81 4.57 0.39 0.55 1.27 BSC 1.27 1.77 2.54 BSC 0.21 0.38 2.80 3.55 7.62 BSC 0_ 15_ 0.51 1.01 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.150 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN EXCESS OF D DIMENSION AT MAXIMUM MATERIAL CONDITION. MILLIMETERS INCHES DIM MIN MAX MIN MAX A 12.65 12.95 0.499 0.510 B 7.40 7.60 0.292 0.299 C 2.35 2.65 0.093 0.104 D 0.35 0.49 0.014 0.019 F 0.50 0.90 0.020 0.035 G 1.27 BSC 0.050 BSC J 0.25 0.32 0.010 0.012 K 0.10 0.25 0.004 0.009 M 0_ 7_ 0_ 7_ P 10.05 10.55 0.395 0.415 R 0.25 0.75 0.010 0.029 M Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters can and do vary in different applications. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. 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