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74FR16245 16-Bit Transceiver with 3-STATE Outputs
October 1989 Revised August 1999
74FR16245 16-Bit Transceiver with 3-STATE Outputs
General Description
The 74FR16245 contains sixteen non-inverting bidirectional buffers with 3-STATE outputs and is intended for busoriented applications. Current sinking capability is 64 mA on both the A and B Ports. The device is byte controlled. Each byte has separate control inputs which can be shorted together for full 16-bit operation. The transmit/ receive (T/Rn) inputs determine the direction of data flow through the transceiver. The output enable (OEn) inputs disable both A and B Ports by placing them in an high impedance state.
Features
s Non-inverting buffers s Bidirectional data paths s A and B output sink capability of 64 mA, source capability of 15 mA s Separate control pins for each byte s Guaranteed pin-to-pin skew s Low 3-STATE IIL s 16-Bit version of the 74F245 or 74F645
Ordering Code:
Order Number 74FR16245QC 74FR16245SSC Package Number V44A MS48A Package Description 44-Lead Plastic Lead Chip Carrier (PLCC), JEDEC MO-047, 0.650 Square 48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code.
Connection Diagrams
Pin Assignment for SSOP Pin Assignment for PLCC
Logic Symbol
(c) 1999 Fairchild Semiconductor Corporation
DS010614
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74FR16245
Pin Descriptions
Pin Names OEn T/Rn A0-A15 B0-B15 Description Output Enable Input Transmit/Receive Input A Bus Inputs/3-STATE Outputs B Bus Inputs/3-STATE Outputs
Truth Table
Inputs Byte1 (0:7) OE1 L L H H L L H
H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial
Output Operating Mode
Byte2 (8:15) OE2 H H L L L L H T/R2 X X L H L H X Byte1 (0:7) Bus B Data to A Bus A Data to B High Z State High Z State Bus B Data to A Bus A Data to B High Z State Byte2 (8:15) High Z State High Z State Bus B Data to A Bus A Data to B Bus B Data to A Bus A Data to B High Z State
T/R1 L H X X L H X
Logic Diagram
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74FR16245
Absolute Maximum Ratings(Note 1)
Storage Temperature Ambient Temperature under Bias Junction Temperature under Bias VCC Pin Potential to Ground Pin Input Voltage (Note 2) Input Current (Note 2) Voltage Applied to Output in HIGH State (with VCC = 0V) Standard Output 3-STATE Output Current Applied to Output in LOW State (Max) ESD Last Passing Voltage (Min) Twice the Rated IOL (mA) 4000V -0.5V to VCC -0.5V to +5.5V -65C to +150C -55C to +125C -55C to +150C -0.5V to +7.0V -0.5V to +7.0V -30 mA to +5.0 mA
Recommended Operating Conditions
Free Air Ambient Temperature Supply Voltage 0C to +70C +4.5V to +5.5V
Note 1: Absolute maximum ratings are values beyond which the device may be damaged or have its useful life impaired. Functional operation under these conditions is not implied. Note 2: Either voltage limit or current limit is sufficient to protect inputs.
DC Electrical Characteristics
Symbol VIH VIL VCD VOH Parameter Input HIGH Voltage Input LOW Voltage Input Clamp Diode Voltage Output HIGH Voltage VOL IIH IBVI IBVIT IIL Output LOW Voltage Input HIGH Current Input HIGH Current Break-Down Test Input HIGH Current Breakdown Test (I/O) Input LOW Current IOS IIH + IOZH IIL + IOZL ICEX VID IOD IZZ ICCH ICCL ICCZ CIN Output Short-Circuit Current Output Leakage Current Output Leakage Current Output HIGH Leakage Current Input Leakage Test Output Circuit Leakage Current Bus Drainage Test Power Supply Current Power Supply Current Power Supply Current Input Capacitance 70 127 71 8.0 17.0 4.75 3.75 100 105 165 105 -100 0 -20 2.4 2.0 2.8 2.44 V Min Min 2.0 0.8 -1.2 Typ Max Units V V V Min VCC Conditions Recognized as a HIGH Signal Recognized as a LOW Signal IIN = -18 mA IOH = - 3 mA IOH = - 15 mA (An, Bn) 0.45 0.55 5.0 7.0 0.1 -150 -100 -225 25 -150 50 V A A mA A A mA A A A V A A mA mA mA pF pF Min Max Max Max Max Max Max Max Max Max 0.0 0.0 0.0 Max Max Max 5.0 5.0 IOL = 64 mA (An, Bn) VIN = 2.7V VIN = 7.0V (OEn, T/Rn) VIN = 5.5V (An, Bn) VIN = 0.5V (T/Rn, An, B n) VIN = 0.5V (OE n) VOUT = 0V (An, Bn) VOUT = 2.7V (An, Bn) VOUT = 0.5V (An, Bn) VOUT = VCC (An, Bn) IID = 1.9 A All Other Pins Grounded VIOD = 150 mV All Other Pins Grounded VOUT = 5.25V (An, Bn) VO = HIGH VO = LOW VO = HIGH Z OE, T/R An, Bn
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74FR16245
AC Electrical Characteristics
TA = +25C Symbol Parameter Min tPLH tPHL tPZH tPZL tPHZ tPLZ Output Disable Time Propagation Delay An to Bn or Bn to An Output Enable Time 1.3 1.3 3.9 3.9 1.8 1.8 VCC = +5.0V CL = 50 pF Typ 2.7 2.2 6.9 9.7 3.9 4.4 Max 4.3 4.3 13.9 13.9 6.3 6.3 TA = 0C to +70C VCC = +5.0V CL = 50 pF Min 1.3 1.3 3.9 3.9 1.8 1.8 Max 4.3 4.3 13.9 13.9 6.3 6.3 ns ns ns Unit
Extended AC Characteristics
TA = 0C to +70C VCC = +5.0V Symbol Parameter CL = 50 pF 16 Outputs Switching (Note 4) Min tPLH tPHL tPZH tPZL tPHZ tPLZ tOSHL (Note 3) tOSLH (Note 3) tOST (Note 3) Pin-to-Pin Skew for HL Transitions Pin-to-Pin Skew for LH Transitions Pin-to-Pin Skew for HL/LH Transitions Output Disable Time Propagation Delay An to Bn or Bn to An Output Enable Time 1.3 1.3 3.9 3.9 1.8 1.8 Max 5.8 5.8 14.6 14.6 6.3 6.3 1.2 2.2 2.5 Min 3.2 3.2 (Note 5) Max 8.2 8.2 ns ns ns ns ns ns TA = 0C to +70C VCC = +5.0V CL = 250 pF Unit
Note 3: 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. Note 4: 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 5: 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.
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74FR16245
Physical Dimensions inches (millimeters) unless otherwise noted
44-Lead Plastic Lead Chip Carrier (PLCC), JEDEC MO-047, 0.650 Square Package Number V44A
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74FR16245 16-Bit Transceiver with 3-STATE Outputs
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300 Wide Package Number MS48A
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: 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 6 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. www.fairchildsemi.com

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