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54F 74F545 Octal Bidirectional Transceiver with TRI-STATE Outputs
May 1995
54F 74F545 Octal Bidirectional Transceiver with TRI-STATE Outputs
General Description
The ’F545 is an 8-bit TRI-STATE high-speed transceiver It provides bidirectional drive for bus-oriented microprocessor and digital communications systems Straight through bidirectional transceivers are featured with 24 mA (20 mA Mil) bus drive capability on the A ports and 64 mA (48 mA Mil) bus drive capability on the B ports One input Transmit Receive (T R) determines the direction of logic signals through the bidirectional transceiver Transmit enables data from A ports to B ports Receive enables data from B ports to A ports The Output Enable input disables both A and B ports by placing them in a TRI-STATE condition
Features
Y Y
Y
Y
Y
Y Y
Higher drive than 8304 8-bit bidirectional data flow reduces system package count TRI-STATE inputs outputs for interfacing with bus-oriented systems 24 mA (20 mA Mil) and 64 mA (48 mA Mil) bus drive capability on A and B ports respectively Transmit Receive and Output Enable simplify control logic Guaranteed 4000V minimum ESD protection Pin for Pin compatible with Intel 8286
Commercial 74F545PC
Military
Package Number N20A
Package Description 20-Lead (0 300 Wide) Molded Dual-In-Line 20-Lead Ceramic Dual-In-Line 20-Lead (0 300 Wide) Molded Small Outline JEDEC 20-Lead (0 300 Wide) Molded Small Outline EIAJ 20-Lead Cerpack 20-Lead Ceramic Leadless Chip Carrier Type C
54F545DM (Note 2) 74F545SC (Note 1) 74F545SJ (Note 1) 54F545FM (Note 2) 54F545LM (Note 2)
Note 1 Devices also available in 13
J20A M20B M20D W20A E20A
reel Use suffix e SCX and SJX
Note 2 Military grade device with environmental and burn-in processing Use suffix e DMQB FMQB and LMQB
Logic Symbols
TL F 9556 – 3
IEEE IEC
TL F 9556 – 5
TRI-STATE is a registered trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation
TL F 9556
RRD-B30M105 Printed in U S A
Connection Diagrams
Pin Assignment for DIP SOIC and Flatpak Pin Assignment for LCC
TL F 9556 – 2 TL F 9556–1
Truth Table Inputs OE L L H T R L H X Bus B Data to Bus A Bus A Data to Bus B High Z
H e HIGH Voltage Level L e LOW Voltage Level X e Immaterial Z e High Impedance
Outputs
Unit Loading Fan Out
54F 74F Pin Names OE T R A 0 – A7 B0 – B7 Description UL HIGH LOW Input IIH IIL Output IOH IOL
Output Enable Input (Active LOW) 10 20 20 mA b1 2 mA Transmit Receive Input 10 20 20 mA b1 2 mA Side A TRI-STATE Inputs or 3 5 1 083 70 mA b650 mA TRI-STATE Outputs 150 40 (33 3) b3 mA 24 mA (20 mA) Side B TRI-STATE Inputs or 3 5 1 083 70 mA b650 mA TRI-STATE Outputs 600 106 6 (80) b12 mA 64 mA (48 mA)
2
Absolute Maximum Ratings (Note 1)
If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Storage Temperature Ambient Temperature under Bias Junction Temperature under Bias Plastic VCC Pin Potential to Ground Pin
b 65 C to a 150 C b 55 C to a 125 C b 55 C to a 175 C b 55 C to a 150 C
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
Recommended Operating Conditions
Free Air Ambient Temperature Military Commercial Supply Voltage Military Commercial
b 55 C to a 125 C 0 C to a 70 C a 4 5V to a 5 5V a 4 5V to a 5 5V
b 0 5V to a 7 0V b 0 5V to a 7 0V Input Voltage (Note 2) b 30 mA to a 5 0 mA Input Current (Note 2) Voltage Applied to Output in HIGH State (with VCC e 0V) b 0 5V to VCC Standard Output b 0 5V to a 5 5V TRI-STATE Output Current Applied to Output in LOW State (Max) twice the rated IOL (mA)
ESD Last Passing Voltage (Min)
4000V
DC Electrical Characteristics
Symbol VIH VIL VCD VOH Parameter Min Input HIGH Voltage Input LOW Voltage Input Clamp Diode Voltage Output HIGH Voltage 54F 10% VCC 54F 10% VCC 54F 10% VCC 74F 10% VCC 74F 10% VCC 74F 10% VCC 74F 5% VCC 74F 5% VCC 54F 10% VCC 54F 10% VCC 74F 10% VCC 74F 10% VCC 54F 74F 54F 74F 54F 74F 54F 74F 74F 74F 4 75 3 75
b1 2
54F 74F Typ Max 20 08
b1 2
Units V V V
VCC
Conditions Recognized as a HIGH Signal Recognized as a LOW Signal
Min
IIN e b18 mA (OE T R) IOH IOH IOH IOH IOH IOH IOH IOH IOL IOL IOL IOL
e e e e e e e e e e e e b 1 mA (An) b 3 mA (An) b 12 mA (Bn) b 1 mA (An) b 3 mA (An) b 15 mA (Bn) b 1 mA (An) b 3 mA (An)
25 24 20 25 24 20 27 27 05 0 55 05 0 55 20 0 50 100 70 10 05 250 50
V
Min
VOL
Output LOW Voltage
V
Min
20 mA (An) 48 mA (Bn) 24 mA (An) 64 mA (Bn)
IIH IBVI IBVIT ICEX VID IOD IIL IIH a IOZH IIL a IOZL IOS
Input HIGH Current Input HIGH Current Breakdown Test Input HIGH Current Breakdown (I O) Output HIGH Leakage Current Input Leakage Test Output Leakage Circuit Current Input LOW Current
mA mA mA mA V mA mA mA mA mA
Max Max Max Max 00 00 Max Max Max .