OCTAL BIDIRECTIONAL TRANSCEIVER WITH 3-STATE OUTPUTS The MC74AC640/74ACT640 octal bus transceiver is designed for asynchronous two-way communication between data buses. The device transmits data from bus A to bus B when T/R = HIGH, or from bus B to bus A when T/R = LOW. The enable input can be used to disable the device so the buses are effectively isolated. • Bidirectional Data Path • A and B Outputs Sink 24 mA/Source –24 mA • ′ACT640 Has TTL Compatible Inputs VCC OE B0 B1 B2 B3 B4 B5 B6 B7 20 19 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 9 10 T/R A0 A1 A2 A3 A4 A5 A6 A7 GND N SUFFIX CASE 738-03 PLASTIC DW SUFFIX CASE 751D-04 PLASTIC PIN NAMES A0–A7 OE T/R B0–B7 Side A Inputs or 3-State Outputs Output Enable Input Transmit/Receive Input Side B Inputs or 3-State Outputs TRUTH TABLE OE T/R Applied Inputs Valid Direction I/P→O/P Output H L L L L X H H L L X H L H L X A to B A to B B to A B to A X L H L H H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial FACT DATA 5-1 MC74AC640 MC74ACT640 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 5-2 25 MC74AC640 MC74ACT640 DC CHARACTERISTICS Symbol Parameter VCC (V) 74AC 74AC TA = +25°C TA = –40°C to +85°C 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 µA V *VIN = VIL or VIH –12 mA IOH –24 mA –24 mA IOUT = 50 µA V V *VIN = VIL or VIH 12 mA IOL 24 mA 24 mA IIN Maximum Input Leakage Current 5.5 ±0.1 ±1.0 µA VI = VCC, GND IOZT Maximum 3-State Current 5.5 ±0.6 ±6.0 µA 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 µA 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 5-3 MC74AC640 MC74ACT640 AC CHARACTERISTICS (For Figures and Waveforms — See Section 3) Symbol VCC* (V) Parameter 74AC 74AC TA = +25°C CL = 50 pF TA = –40°C to +85°C CL = 50 pF Min Typ Max Min Max Unit Fig. No. tPLH Propagation Delay An to Bn or Bn to An 3.3 5.0 1.5 1.5 5.0 3.5 8.5 6.5 1.0 1.0 9.5 7.5 ns 3-5 tPHL Propagation Delay An to Bn or Bn to An 3.3 5.0 1.5 1.5 5.0 3.5 8.5 6.5 1.0 1.0 9.5 7.5 ns 3-5 tPZH Output Enable Time 3.3 5.0 2.5 1.5 8.0 6.0 11.5 8.0 2.0 1.0 12.5 9.0 ns 3-7 tPZL Output Enable Time 3.3 5.0 2.5 1.5 8.5 6.5 12.5 9.5 2.0 1.0 13.5 10.0 ns 3-8 tPHZ Output Disable Time 3.3 5.0 2.0 1.5 8.0 6.0 12.0 9.0 1.0 1.0 12.5 10.0 ns 3-7 tPLZ Output Disable Time 3.3 5.0 2.0 1.5 8.5 6.5 12.0 9.5 1.5 1.0 13.5 10.5 ns 3-8 * Voltage Range 3.3 V is 3.3 V ±0.3 V. Voltage Range 5.0 V is 5.0 V ±0.5 V. DC CHARACTERISTICS Symbol Parameter VCC (V) 74ACT 74ACT TA = +25°C TA = –40°C to +85°C 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 µA VI = VCC, GND 1.5 mA VI = VCC – 2.1 V ±6.0 µA 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 µA 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 IOZT Maximum 3-State Current 5.5 IOLD IOHD ICC †Minimum Dynamic Output Current Maximum Quiescent Supply Current 0.001 0.001 0.6 ±0.6 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 5-4 V V IOUT = –50 µA *VIN = VIL or VIH –24 mA IOH –24 mA IOUT = 50 µA MC74AC640 MC74ACT640 AC CHARACTERISTICS (For Figures and Waveforms — See Section 3) Symbol Parameter VCC* (V) 74ACT 74ACT TA = +25°C CL = 50 pF TA = –40°C to +85°C CL = 50 pF Min Typ Max Min Max Unit Fig. No. tPLH Propagation Delay An to Bn or Bn to An 5.0 1.5 1.5 1.0 8.5 ns 3-5 tPHL Propagation Delay An to Bn or Bn to An 5.0 1.5 8.0 1.0 9.0 ns 3-5 tPZH Output Enable Time 5.0 1.5 10.0 1.0 11.0 ns 3-7 tPZL Output Enable Time 5.0 1.5 10.0 1.0 11.0 ns 3-8 tPHZ Output Disable Time 5.0 1.5 10.0 1.0 11.0 ns 3-7 tPLZ Output Disable Time 5.0 1.5 10.0 1.0 11.0 ns 3-8 * 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 CI/O Input/Output Capacitance 15 pF VCC = 5.0 V CPD Power Dissipation Capacitance 45 pF VCC = 5.0 V FACT DATA 5-5 MC74AC640 MC74ACT640 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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