Revised August 1999 74FR9245 9-Bit Bidirectional Transceiver with 3-STATE Outputs General Description Features The 74FR9245 contains nine non-inverting bidirectional buffers with 3-STATE outputs and is intended for bus-oriented applications. Current sinking capability is 64 mA on 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. ■ Non-inverting buffers ■ Bidirectional data path ■ A and B output sink capability of 64 mA, source capability of 15 mA ■ Guaranteed pin-to-pin skew, multiple output switching and 250 pf delay Ordering Code: Order Number Package Number 74FR9245SC M24B Package Description 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 74FR9245MSA MSA24 24-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide 74FR9245SPC N24C 24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-100, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Symbol © 1999 Fairchild Semiconductor Corporation Connection Diagram DS010914 www.fairchildsemi.com 74FR9245 9-Bit Bidirectional Transceiver with 3-STATE Outputs April 1991 74FR9245 Pin Descriptions Pin Names Truth Table Description Inputs Output OE Output Enable Input (Active-LOW) T/R Transmit/Receive Input L L A0–A8 Side A Inputs or 3-STATE Outputs L H Bus A Data to Bus B B0–B8 Side B Inputs or 3-STATE Outputs H X High Z State OE H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Logic Diagram www.fairchildsemi.com 2 T/R Bus B Data to Bus A Recommended Operating Conditions Storage Temperature −65°C to +150°C Ambient Temperature under Bias −55°C to +125°C Free Air Ambient Temperature Junction Temperature under Bias −55°C to +150°C Supply Voltage 0°C to +70°C +4.5V to +5.5V −0.5V to +7.0V VCC Pin Potential to Ground Pin Input Voltage (Note 2) −0.5V to +7.0V Input Current (Note 2) −30 mA to +5.0 mA Voltage Applied to Output in HIGH State (with VCC = 0V) Standard Output −0.5V to VCC 3-STATE Output −0.5V to +5.5V Note 1: Absolute maximum ratings are value beyond which the device may be damaged or have its useful life impaired. Functional operation under these conditions is not implied. Current Applied to Output in LOW State (Max) Note 2: Either voltage limit or current limit is sufficient to protect inputs. twice the rated IOL (mA) ESD Last Passing Voltage (Min) 4000V DC Electrical Characteristics Symbol Parameter Min Typ Max 2.0 Units VCC V Conditions VIH Input HIGH Voltage VIL Input LOW Voltage 0.8 V VCD Input Clamp Diode Voltage −1.2 V Min IIN = −18 mA VOH Output HIGH Voltage V Min IOH = −3 mA (An, Bn) V Min IOH = −15 mA (An, Bn) VOL Output LOW Voltage 0.55 V Min IOL = 64 mA (An, Bn) 5 µA Max VIN = 2.7V (OE, T/R) 7 µA Max VIN = 7.0V (OE, T/R) 100 µA Max VIN = 5.5V (An, B n) −250 µA Max VIN = 0.5V (OE, T/R) V 0.0 2.4 2.0 IIH Input HIGH Current IBVI Input HIGH Current IBVIT Input HIGH Current Breakdown Test Breakdown Test (I/O) IIL Input LOW Current VID Input Leakage Test 4.75 Recognized HIGH Signal Recognized LOW Signal IID = 1.9 µA All Other Pins Grounded IOD Output Circuit Leakage Current VIOD = 150 mV 3.75 µA 0.0 25 µA Max VOUT = 2.7V (An, Bn) −150 µA Max VOUT = 0.5V (An, Bn) −225 mA Max VOUT = 0.0V (An, Bn) 50 µA Max VOUT = VCC (An, Bn) All Other Pins Grounded IIH + IOZH Output Leakage Current IIL + IOZL Output Leakage Current IOS Output Short-Circuit Current ICEX Output HIGH Leakage Current IZZ Bus Drainage Test 100 µA 0.0 VOUT = 5.25V (An, Bn) ICCH Power Supply Current 55 80 mA Max All Outputs HIGH ICCL Power Supply Current 75 115 mA Max All Outputs LOW ICCZ Power Supply Current 65 85 mA Max Outputs 3-STATE CIN Input Capacitance −100 8.0 pF 5.0 OE, T/R 17.0 pF 5.0 An, Bn 3 www.fairchildsemi.com 74FR9245 Absolute Maximum Ratings(Note 1) 74FR9245 AC Electrical Characteristics Symbol Parameter TA = +25°C TA = 0°C to +70°C VCC = +5.0V VCC = +50V CL = 50 pF CL = 50 pF Min Typ Max Min Max tPLH Propagation Delay 1.0 2.6 3.9 1.0 3.9 tPHL An to Bn or Bn to An 1.0 1.7 3.9 1.0 3.9 tPZH Output Enable Time tPZL tPHZ Output Disable Time tPLZ 2.7 5.0 6.5 2.7 6.5 2.7 4.3 6.5 2.7 6.5 1.7 3.7 6.0 1.7 6.0 1.7 3.6 6.0 1.7 6.0 Units ns ns ns Extended AC Electrical Characteristics TA = 0°C to +70°C Symbol Parameter TA = 0°C to +70°C VCC = +50V VCC = +50V CL = 50 pF CL = 250 pF Eight Outputs Switching (Note 4) Units (Note 3) Max Min Max tPLH Propagation Delay 1.0 5.8 2.2 8.1 tPHL An to Bn or Bn to An 1.0 5.8 2.2 8.1 tPZH Output Enable Time 2.7 8.8 2.7 8.8 tPZL tPHZ Output Disable Time tPLZ tOSHL Pin-to-Pin Skew (Note 5) for HL Transitions tOSLH Pin-to-Pin Skew (Note 5) for LH Transitions tOST Pin-to-Pin Skew (Note 5) for HL/LH Transitions Min 1.7 7.0 1.7 7.0 ns ns ns 2.0 ns 1.0 ns 3.0 ns Note 3: 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, 3-STATE-to-HIGH, etc. Note 4: These specifications 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 5: Skew is defined as the absolute value of the difference between the actual propagation delays for any two outputs of the same device. The specification applies to any outputs switching HIGH-to-LOW (tOSHL), LOW-to-HIGH (tOSLH), or HIGH-to-LOW and/or LOW-to-HIGH (tOST). Specifications guaranteed with all outputs switching in phase. www.fairchildsemi.com 4 74FR9245 Physical Dimensions inches (millimeters) unless otherwise noted 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide Package Number M24B 24-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide Package Number MSA24 5 www.fairchildsemi.com 74FR9245 9-Bit Bidirectional Transceiver with 3-STATE Outputs Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-100, 0.300 Wide Package Number N24C 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 6