74LVX245 Low Voltage Octal Bidirectional Transceiver
January 1996
74LVX245 Low Voltage Octal Bidirectional Transceiver
General Description
The LVX245 contains eight non-inverting bidirectional buffers is intended for bus-oriented applications The Transmit Receive (T R) input determines the direction of data flow through the bidirectional transceiver Transmit (activeHIGH) 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
Features
Y Y
Y
Ideal for low power low noise 3 3V applications Available in SOIC JEDEC SOIC EIAJ and TSSOP packages Guaranteed simultaneous switching noise level and dynamic threshold performance
Logic Symbols
Connection Diagram
Pin Assignment for SOIC and TSSOP
TL F 11597–1
TL F 11597 – 3 TL F 11597 – 5
Pin Names OE TR A 0 – A7 B 0 – B7
Description Output Enable Input Transmit Receive Input Side A TRI-STATE Inputs or TRI-STATE Outputs Side B TRI-STATE Inputs or TRI-STATE Outputs
Truth Table
Inputs OE L L H
H e HIGH Voltage Level
Outputs TR L H X Bus B Data to Bus A Bus A Data to Bus B HIGH-Z State
X e Immaterial
L e LOW Voltage Level
SOIC JEDEC Order Number See NS Package Number 74LVX245M 74LVX245MX M20B
SOIC EIAJ 74LVX245SJ 74LVX245SJX M20D
TSSOP 74LVX245MTC 74LVX245MTCX MTC20
TRI-STATE is a registered trademark of National Semiconductor Corporation C1996 National Semiconductor Corporation
TL F 11597
RRD-B30M17 Printed in U S A
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Absolute Maximum Ratings (Note)
If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications
b 0 5V to a 7 0V Supply Voltage (VCC) DC Input Diode Current (IIK) b 20 mA VI e b0 5V b 0 5V to 7V DC Input Voltage T R OE (VI) DC Diode Current (IOK) b 20 mA VO e b0 5V a 20 mA VO e VCC a 0 5V b 0 5V to VCC a 0 5V DC Bus I O Voltage (VI O) DC Output Source g 25 mA or Sink Current (IO) DC VCC or Ground Current g 75 mA (ICC or IGND) b 65 C to a 150 C Storage Temperature (TSTG) Power Dissipation 180 mW Note The ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed The device should not be operated at these limits The parametric values defined in the ‘‘Electrical Characteristics’’ table are not guaranteed at the absolute maximum ratings The ‘‘Recommended Operating Conditions’’ table will define the conditions for actual device operation
Recommended Operating Conditions
Supply Voltage (VCC) Input Voltage T R OE (VI) Bus I O Voltage (VI O) Operating Temperature (TA) Input Rise and Fall Time (Dt DV) 2 0V to 3 6V 0V to 5 5V 0V to VCC b 40 C to a 85 C 0 ns V to 100 ns V
DC Electrical Characteristics
74LVX245 Symbol Parameter VCC TA e a 25 C Min VIH High Level Input Voltage Low Level Input Voltage High Level Output Voltage Low Level Output Voltage TRI-STATE Output Off-State Current Input Leakage Current Quiescent Supply Current 20 30 36 20 30 36 20 30 30 20 30 30 19 29 2 58 20 30 00 00 01 01 0 36
g 0 25
74LVX245 TA e b 40 C to a 85 C Min 15 20 24 05 08 08 19 29 2 48 01 01 0 44
g2 5
Units
Conditions
Typ
Max
Max V 05 08 08
15 20 24
VIL
V VIN e VIH or VIL V VIN e VIH or VIL V IOH e b50 mA IOH e b50 mA IOH e b4 mA IOL e 50 mA IOL e 50 mA IOL e 4 mA
VOH
VOL
IOZ
36
mA
VIN e VIH or VIL VOUT e VCC or GND
IIN
g0 1
g1 0
VIN e 5 5V or GND mA
36 40 36 40 0
ICC
VIN e VCC or GND mA
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2
Noise Characteristics
74LVX245 Symbol Parameter VCC (V) 33 33 33 33 TA e 25 C Typ VOLP VOLV VIHD VILD Quiet Output Maximum Dynamic VOL Quiet Output Minimum Dynamic VOL Minimum High Level Dynamic Input Voltage Maximum Low Level Dynamic Input Voltage 05
b0 5
Units
Conditions CL (pF) 50 50 50 50
Limit 08
b0 8
V V V V
20 08
Note Input tr e tf e 3 ns
AC Electrical Characteristics
74LVX245 Symbol Parameter VCC (V) TA e a 25 C Min tPLH tPHL Propagation Delay Time 27 Typ 61 86 3 3 g0 3 tPZL tPZH TRI-STATE Output Enable Time 47 72 27 90 11 5 3 3g0 3 tPLZ tPHZ tOSLH tOSHL TRI-STATE Output Disable Time Output to Output Skew (Note 1) 27 3 3 g0 3 27 71 96 11 5 96 Max 10 7 14 2 68 10 1 16 9 20 4 11 0 14 5 18 0 12 8 15 74LVX245 TA e b 40 C to a 85 C Min 10 10 10 10 10 10 10 10 10 10 Max 13 5 17 0 80 11 5 20 5 24 0 13 0 16 5 21 0 14 5 15 ns ns ns ns CL e 15 pF CL e 50 pF CL e 15 pF CL e 50 pF CL e 15 pF RL e 1 kX CL e 50 pF RL e 1 kX CL e 15 pF RL e 1 kX CL e 50 pF RL e 1 kX CL e 50 pF RL e 1 kX CL e 50 pF RL e 1 kX CL e 50 pF (Note 1) Units Conditions
Note 1 Parameter guaranteed by design tOSLH e l tPLHm b tPLHn l tOSHL e l tPHLm b tPHLn l
Capacitance
74LVX245 Symbol Parameter TA e a 25 C Min CIN CI O CPD Input Capacitance T R OE Output Capacitance An Bn Power Dissipation Capacitance (Note 1) Typ 4 8 21 Max 10 74LVX245 TA e b 40 C to a 85 C Min Max 10 pF pF pF Units
Note 1 CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load CPD c VCC c fIN a ICC Average operating current can be obtained by the equation ICC(opr ) e 8 (per bit)
3
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74LVX245 Ordering Information
The device number is used to form part of a simplified purchasing code where the package type and temperature range are defined as follows
TL F 11597 – 7
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (M) Order Number 74LVX245M or 74LVX245MX NS Package Number M20B
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4
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Package EIAJ SOIC (SJ) Order Number 74LVX245SJ or 74LVX245SJX NS Package Number M20D
5
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74LVX245 Low Voltage Octal Bidirectional Transceiver
Physical Dimensions All dimensions in millimeters (Continued)
20-Lead Thin Shrink Small Outline Package JEDEC Order Number 74LVX245MTC or 74LVX245MTCX NS Package Number MTC20
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