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Details, datasheet, quote on part number:JD54F138SFA
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| Part: | JD54F138SFA |
| Category: | Logic => Military/Aerospace->Low Power Schottky |
| Description: | DM54LS138 - 3-to-8 Line Decoder/Demultiplexer, Package: Lcc, Pin Nb=20 |
| Company: | National Semiconductor Corporation |
| Datasheet: | Download JD54F138SFA datasheet File size : 169 kB |
| Request For quote: | Find where to buy JD54F138SFA
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Datasheet text preview:
5 54LS138 DM54LS138 DM74LS138 4LS139 DM54LS139 DM74LS139 Decoders Demultiplexers
June 1989
54LS138 DM54LS138 DM74LS138 4LS139 DM54LS139 DM74LS139 Decoders Demultiplexers
General Description
These Schottky-clamped circuits are designed to be used in high-performance memory-decoding or data-routing applications requiring very short propagation delay times In high-performance memory systems these decoders can be used to minimize the effects of system decoding When used with high-speed memories the delay times of these decoders are usually less than the typical access time of the memory This means that the effective system delay introT duced by the decoder is negligible he LS138 decodes one-of-eight lines based upon the conditions at the three binary select inputs and the three enable inputs Two active-low and one active-high enable inputs reduce the need for external gates or inverters when expanding A 24-line decoder can be implemented with no external inverters and a 32-line decoder requires only one inverter An enable input can be used as a data input for T demultiplexing applications he LS139 comprises two separate two-line-to-four-line decoders in a single package The active-low enable input can A be used as a data line in demultiplexing applications ll C of these decoders demultiplexers feature fully buffered inputs presenting only one normalized load to its driving circuit All inputs are clamped with high-performance Schottky diodes to suppress line-ringing and simplify system F sign de
eatures
Y
Y
Y
Y Y
Y
Y
Designed specifically for high speed M emory decoders Data transmission systems LS138 3-to-8-line decoders incorporates 3 enable inputs to simplify cascading and or data reception LS139 contains two fully independent 2-to-4-line decoders demultiplexers Schottky clamped for high performance Typical propagation delay (3 levels of logic) LS138 21 ns LS139 21 ns Typical power dissipation LS138 32 mW LS139 34 mW 5 Alternate Military Aerospace devices (54LS138 4LS139) are available Contact a National Semiconductor Sales Office Distributor for specifications
onnection Diagrams
Dual-in-Line Package Dual-in-Line Package
TL F 6391 1
TL F 6391 2
Order Number 54LS138DMQB 54LS138FMQB 54LS13DLMQB DM54LS138J DM54LS138W 8 M74LS138M or DM74LS138N See NS Package Number E20A J16A M16A N16E or W16A
C1995 National Semiconductor Corporation TL F 6391
Order Number 54LS139DMQB 54LS139FMQB 54LS13DLMQB DM54LS139J DM54LS139W 9 M74LS139M or DM74LS139N See NS Package Number E20A J16A M16A N16E or W16A
RRD-B30M105 Printed in U S A
Absolute Maximum Ratings (Note)
p If Military Aerospace specified devices are required lease contact the National Semiconductor Sales S Office Distributors for availability and specifications upply Voltage Input Voltage 7V 7V 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 T he ``Recommended Operating Conditions'' table will define the conditions for actual device operation
Operating Free Air Temperature Range R b 55 C to a 125 C DM54LS and 54LS DM74LS 0 C to a 70 C Storage Temperature Range
b 65
C to a 150 C
ecommended Operating Conditions
Symbol VCC VIH VIL IOH IOL TA Parameter Min Supply Voltage High Level Input Voltage Low Level Input Voltage High Level Output Current Low Level Output Current Free Air Operating Temperature
b 55
DM54LS138 Nom 5 Max 55 Min 4 75 2 07
b0 4
DM74LS138 Nom 5 Max 5 25
Units V V 08
b0 4
45 2
V mA mA
4 125 0
8 70
C
'LS138 Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted) Symbol VI VOH Parameter Input Clamp Voltage High Level Output Voltage Low Level Output Voltage Conditions VCC e Min II e b18 mA VCC e Min IOH e Max VIL e Max VIH e Min VCC e Min IOL e Max VIL e Max VIH e Min IOL e 4 mA VCC e Min II IIH IIL IOS Input Current Input Voltage
Max
Min
Typ (Note 1)
Max
b1 5
Units V V
DM54 DM74 DM54 DM74 DM74
25 27
34 34 0 25 0 35 0 25 04 05 04 01 20
b 0 36
VOL
V
VCC e Max VI e 7V VCC e Max VI e 2 7V VCC e Max VI e 0 4V VCC e Max (Note 2) VCC e Max (Note 3) DM54 DM74
b 20 b 20
mA mA mA mA mA
High Level Input Current Low Level Input Current Short Circuit Output Current Supply Current
b 100 b 100
ICC
63
10
Note 1 All typicals are at VCC e 5V TA e 25 C Note 2 Not more than one output should be shorted at a time and the duration should not exceed one second ote 3 ICC is measured with all outputs enabled and open 2
'LS138 Switching Characteristics
at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load) From (Input) To (Output) Levels of Delay RL e 2 kX CL e 15 pF Min tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Select to Output Select to Output Select to Output Select to Output Enable to Output Enable to Output Enable to Output Enable to Output 2 2 3 3 2 2 3 3 Max 18 27 18 27 18 24 18 28 CL e 50 pF Min Max 27 40 27 40 27 40 27 40 ns ns ns ns ns ns ns ns Units
Symbol
Parameter
Recommended Operating Conditions
Symbol VCC VIH VIL IOH IOL TA Parameter Min Supply Voltage High Level Input Voltage Low Level Input Voltage High Level Output Current Low Level Output Current Free Air Operating Temperature
b 55
DM54LS139 Nom 5 Max 55 Min 4 75 2 07
b0 4
DM74LS139 Nom 5 Max 5 25
Units V V 08
b0 4
45 2
V mA mA
4 125 0
8 70
C
3
'LS139 Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted) Symbol VI VOH VOL Parameter Input Clamp Voltage High Level Output Voltage Low Level Output Voltage Conditions VCC e Min II e b18 mA VCC e Min IOH e Max VIL e Max VIH e Min VCC e Min VIL e Max IOL e Max VIH e Min DM54 DM74 DM54 DM74 DM74 25 27 34 34 0 25 0 35 0 25 04 05 04 01 20
b 0 36
Min
Typ (Note 1)
Max
b1 5
Units V V
V
IOL e 4 mA VCC e Min II IIH IIL IOS ICC Input Current Input Voltage
Max
VCC e Max VI e 7V VCC e Max VI e 2 7V VCC e Max VI e 0 4V VCC e Max (Note 2) VCC e Max (Note 3) DM54 DM74
b 20 b 20
mA mA mA mA mA
High Level Input Current Low Level Input Current Short Circuit Output Current Supply Current
b 100 b 100
68
11
Note 1 All typicals are at VCC e 5V TA e 25 C Note 2 Not more than one output should be shorted at a time and the duration should not exceed one second ' ote 3 ICC is measured with all outputs enabled and open
LS139 Switching Characteristics
at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load) From (Input) To (Output) RL e 2 kX CL e 15 pF Min tPLH tPHL tPLH tPHL Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Select to Output Select to Output Enable to Output Enable to Output Max 18 27 18 24 CL e 50 pF Min Max 27 40 27 40 ns ns ns ns Units
Symbol
Parameter
Function Tables
LS138 Inputs Enable G1 G2 X L H H H H H H H H H X L L L L L L L L Select C B A YO Y1 Y2 Y3 Y4 Y5 Y6 Y7 X X L L L L H H H H X X L L H H L L H H X X L H L H L H L H H H L H H H H H H H H H H L H H H H H H H H H H L H H H H H H H H H H L H H H H H H H H H H L H H H H H H H H H H L H H H H H H H H H H L H H H H H H H H H H L Outputs Enable G H L L L L Inputs Select B X L L H H A X L H L H Y0 H L H H H Y1 H H L H H Y2 H H H L H Y3 H H H H L LS139 Outputs
H e High Level L e Low Level X e Don't Care
G2 e G2A a G2B H e High Level L e Low Level X e Don't Care
4
Logic Diagrams
LS138
TL F 6391 3
LS139
TL F 6391 4
5
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