54ACQ245 • 54ACTQ245 Quiet Series Octal Bidirectional Transceiver with TRI-STATE ® Inputs/Outputs General Description Features The ’ACQ/’ACTQ245 contains eight non-inverting bidirectional buffers with TRI-STATE outputs and is intended for bus-oriented applications. Current sinking capability is 24 mA at both the A and B ports. The Transmit/Receive (T/R) input determines the direction of data flow through the bidirectional transceiver. Transmit (active-HIGH) enables data from A ports to B ports; Receive (active-LOW) enables data from B ports to A ports. The Output Enable input, when HIGH, disables both A and B ports by placing them in a HIGH Z condition. The ’ACQ/’ACTQ utilizes NSC Quiet Series technology to guarantee quiet output switching and improve dynamic threshold performance. FACT Quiet Series™ features GTO™ output control and undershoot corrector in addition to a split ground bus for superior performance. n ICC and IOZ reduced by 50% n Guaranteed simultaneous switching noise level and dynamic threshold performance n Improved latch-up immunity n TRI-STATE outputs drive bus lines or buffer memory address registers n Outputs source/sink 24 mA n Faster prop delays than the standard ’ACT245 n 4 kV minimum ESD immunity (’ACQ) n Standard Military Drawing (SMD) — ’ACTQ245: 5962-92187 — ’ACQ245: 5962-92177 Logic Symbols IEEE/IEC DS100237-1 DS100237-2 Pin Description Names OE Output Enable Input T/R Transmit/Receive Input A0–A7 Side A TRI-STATE Inputs or TRI-STATE Outputs B0–B7 Side B TRI-STATE Inputs or TRI-STATE Outputs GTO™ is a trademark of National Semiconductor Corporation. TRI-STATE ® is a registered trademark of National Semiconductor Corporation. FACT ® is a registered trademark of Fairchild Semiconductor Corporation. FACT Quiet Series™ is a trademark of Fairchild Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100237 www.national.com 54ACQ245 • 54ACTQ245 Quiet Series Octal Bidirectional Transceiver with TRI-STATE Inputs/Outputs September 1998 Connection Diagrams Pin Assignment for DIP and Flatpak Pin Assignment for LCC DS100237-4 DS100237-3 Truth Table Inputs OE Outputs T/R L L Bus B Data to Bus A L H Bus A Data to Bus B H X HIGH-Z State H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial www.national.com 2 Absolute Maximum Ratings (Note 1) Recommended Operating Conditions If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) DC Input Diode Current (IIK) VI = −0.5V VI = VCC + 0.5V DC Input Voltage (VI) DC Output Diode Current (IOK) VO = −0.5V VO = VCC + 0.5V DC Output Voltage (VO) DC Output Source or Sink Current (IO) DC VCC or Ground Current per Output Pin (ICC or IGND) Storage Temperature (TSTG) DC Latch-Up Source or Sink Current Junction Temperature (TJ) CDIP Supply Voltage (VCC) ’ACQ ’ACTQ Input Voltage (VI) Output Voltage (VO) Operating Temperature (TA) 54ACQ/ACTQ Minimum Input Edge Rate ∆V/∆t ’ACQ Devices VIN from 30% to 70% of VCC VCC @ 3.0V, 4.5V, 5.5V Minimum Input Edge Rate ∆V/∆t ’ACTQ Devices VIN from 0.8V to 2.0V VCC @ 4.5V, 5.5V −0.5V to +7.0V −20 mA +20 mA −0.5V to VCC + 0.5V −20 mA +20 mA −0.5V to VCC + 0.5V ± 50 mA ± 50 mA −65˚C to +150˚C 2.0V to 6.0V 4.5V to 5.5V 0V to VCC 0V to VCC −55˚C to +125˚C 125 mV/ ns 125 mV/ns 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. National does not recommend operation of FACT ® circuits outside databook specifications. ± 300 mA 175˚C DC Characteristics for ’ACQ Family Devices Symbol Parameter VCC 54ACQ TA = (V) −55˚C to +125˚C Units Conditions Guaranteed Limits VIH VIL VOH Minimum High 3.0 2.1 Level Input 4.5 3.15 Voltage 5.5 3.85 Maximum Low 3.0 0.9 Level Input 4.5 1.35 Voltage 5.5 1.65 Minimum High 3.0 2.9 Level Output 4.5 4.4 Voltage 5.5 5.4 VOUT = 0.1V V or VCC − 0.1V V or VCC − 0.1V VOUT = 0.1V IOUT = −50 µA V (Note 2) VIN = VIL or VIH VOL 3.0 2.4 4.5 3.7 5.5 4.7 Maximum Low 3.0 0.1 Level Output 4.5 0.1 Voltage 5.5 0.1 −12 mA V IOH −24 mA −24 mA IOUT = 50 µA V (Note 2) VIN = VIL or VIH IIN Maximum Input 3.0 0.50 4.5 0.50 5.5 0.50 5.5 ± 1.0 Leakage Current 12 mA V IOL µA 24 mA VI = VCC, GND 24 mA (Note 4) 3 www.national.com DC Characteristics for ’ACQ Family Devices Symbol Parameter (Continued) VCC 54ACQ TA = (V) −55˚C to +125˚C Units Conditions Guaranteed Limits IOLD IOHD (Note 3) Minimum Dynamic Output Current ICC Maximum Quiescent 5.5 50 mA VOLD = 1.65V Max 5.5 −50 mA VOHD = 3.85V Min 5.5 80.0 µA VIN = VCC Supply Current IOZT VOLP or GND (Note 4) VI(OE) = VIL, VIH Maximum I/O Leakage Current 5.5 ± 5.5 µA Quiet Output 5.0 1.5 V Maximum Dynamic VOL VOLV Quiet Output VI = VCC, GND VO = VCC, GND (Note 5) 5.0 −1.2 V Minimum Dynamic VOL (Note 5) Note 2: All outputs loaded; thresholds on input associated with output under test. Note 3: Maximum test duration 2.0 ms, one output loaded at a time. Note 4: IIN and ICC @ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V VCC. Note 5: Max number of outputs defined as (n). Data Inputs are driven 0V to 5V; one output @ GND. DC Characteristics for ’ACTQ Family Devices Symbol Parameter VCC 54ACTQ TA = (V) −55˚C to +125˚C Units Conditions Guaranteed Limits VIH VIL VOH Minimum High Level 4.5 2.0 Input Voltage 5.5 2.0 Maximum Low Level 4.5 0.8 Input Voltage 5.5 0.8 Minimum High Level 4.5 4.4 Output Voltage 5.5 5.4 V VOUT = 0.1V V or VCC − 0.1V VOUT = 0.1V V or VCC − 0.1V IOUT = −50 µA (Note 6) VIN = VIL or VIH VOL 4.5 3.70 5.5 4.70 Maximum Low Level 4.5 0.1 Output Voltage 5.5 0.1 V IOH −24 mA −24 mA V IOUT = 50 µA (Note 6) VIN = VIL or VIH IIN Maximum Input 4.5 0.50 5.5 0.50 V IOL 5.5 5.5 24 mA ± 1.0 µA 24 mA VI = VCC, GND ± 5.0 µA Leakage Current IOZT Maximum TRI-STATE Leakage Current www.national.com 4 VI = VIL, VIH VO = VCC, GND DC Characteristics for ’ACTQ Family Devices Symbol Parameter (Continued) VCC 54ACTQ TA = (V) −55˚C to +125˚C Units Conditions Guaranteed Limits ICCT Maximum 5.5 1.6 mA VI = VCC − 2.1V ICC/Input IOLD IOHD (Note 7) Minimum Dynamic Output Current ICC Maximum Quiescent 5.5 50 mA VOLD = 1.65V Max 5.5 −50 mA VOHD = 3.85V Min 5.5 80.0 µA VIN = VCC 5.0 1.65 V Supply Current VOLP Quiet Output or GND Maximum Dynamic VOL VOLV Quiet Output (Note 8) 5.0 −1.2 V Minimum Dynamic VOL (Note 8) Note 6: All outputs loaded; thresholds on input associated with output under test. Note 7: Maximum test duration 2.0 ms, one output loaded at a time. Note 8: Max number of outputs defined as (n). n−1 Data Inputs are driven 0V to 3V; one output @ GND. AC Electrical Characteristics for ’ACQ Devices 54ACQ TA = −55˚C VCC Symbol Parameter (V) (Note 9) tPHL, tPLH tPZL, tPZH tPHZ, tPLZ Fig. to +125˚C CL = 50 pF Units Min Max Propagation Delay 3.0 1.5 11.5 Data to Output 4.5 1.5 10.0 Output Enable Time 3.0 1.5 13.0 4.5 1.5 10.0 3.0 1.5 13.0 4.5 1.5 10.0 Output Disable Time No. ns ns ns Note 9: Voltage Range 5.0 is 5.0V ± 0.5V Voltage Range 3.3 is 3.3V ± 0.3V 5 www.national.com AC Electrical Characteristics for ’ACTQ Devices 54ACTQ TA = −55˚C VCC Symbol Parameter (V) (Note 10) tPHL, tPLH Propagation Delay Fig. to +125˚C CL = 50 pF Units Min Max 5.0 1.5 9.0 ns Data to Output tPZL, tPZH Output Enable Time 5.0 1.5 12.0 ns tPHZ, tPLZ Output Disable Time 5.0 1.5 11.5 ns Note 10: Voltage Range 5.0 is 5.0V ± 0.5V Capacitance Symbol CIN CI/O Typ Units Input Capacitance Parameter 4.5 pF Input/Output 15 pF Conditions VCC = OPEN VCC = 5.0V 80.0 pF VCC = 5.0V Capacitance CPD Power Dissipation Capacitance www.national.com 6 No. Physical Dimensions inches (millimeters) unless otherwise noted 20-Terminal Ceramic Leadless Chip Carrier (L) NS Package Number E20A 20-Lead Ceramic Dual-In-Line Package (D) NS Package Number J20A 7 www.national.com 54ACQ245 • 54ACTQ245 Quiet Series Octal Bidirectional Transceiver with TRI-STATE Inputs/Outputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Ceramic Flatpak (F) NS Package Number W20A LIFE SUPPORT POLICY NATIONAL’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 NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component in any component of a life support 1. Life support devices or systems are devices or sysdevice or system whose failure to perform can be reatems which, (a) are intended for surgical implant into sonably expected to cause the failure of the life support the body, or (b) support or sustain life, and whose faildevice or system, or to affect its safety or effectiveness. ure 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. 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