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PDF 54ETL16245 Data sheet ( Hoja de datos )
| Número de pieza | 54ETL16245 | |
| Descripción | 16 Bit Data Transceiver | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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PRELIMINARY
May 1994
54 74ETL16245 16-Bit Data
Transceiver with Incident Wave Switching
General Description
The 54 74ETL16245 contains sixteen non-inverting bidirec-
tional buffers with TRI-STATE outputs designed with inci-
dent wave switching live insertion support and enhanced
noise margin for TTL backplane applications
Both the A and B ports include a bus hold circuit to latch the
output to the value last forced on that pin
The B port of this device includes 25X series output resis-
tors which minimize undershoot and ringing
Features
Y Supports the VME64 ETL specification
Y Functionally and pin compatible with industry standard
TTL 16245 SSOP pinout
Y Improved TTL-compatible input threshold range
Y High drive TTL-compatible outputs (IOH e b60 mA
IOL e 90 mA)
Y Supports 25X incident wave switching on the A port
Y BiCMOS design significantly reduces power dissipation
Y Distributed VCC and GND pin configuration minimizes
high-speed switching noise
Y 25X series-dampening resistor on B-port
Y Available in 48-pin SSOP and ceramic flatpak
Y Guaranteed output skew
Y Guaranteed simultaneous switching noise level and
dynamic threshold performance
Y Guaranteed latchup protection
Logic Symbol
Connection Diagram
Pin Assignment for
SSOP and Flatpak
TL F 11654 – 1
Pin Description
Pin Names
DIR
OE
An
Bn
Description
Transmit Receive Input
Output Enable Input (Active LOW)
Backplane Bus Data
Local Bus Data
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL F 11654
TL F 11654 – 2
RRD-B30M105 Printed in U S A
1 page  
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
b65 C to a150 C
Ambient Temperature under Bias
b55 C to a125 C
Junction Temperature under Bias
Ceramic
Plastic
b55 C to a175 C
b55 C to a150 C
VCC Pin Potential to
Ground Pin
b0 5V to a7 0V
Input Voltage (Note 2)
b0 5V to a7 0V
Input Current (Note 2)
b50 mA to a5 0 mA
Voltage Applied to Any Output
in the Disabled or
Power-off State
in the HIGH State
Current Applied to Output
in LOW State (Max)
b0 5V to 5 5V
b0 5V to VCC
128 mA
DC Electrical Characteristics
DC Latchup Source Current
b500 mA
Over Voltage Latchup (I O)
10V
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
b55 C to a125 C
b40 C to a85 C
Supply Voltage
Military
Commercial
a4 5V to a5 5V
a4 5V to a5 5V
Minimum Input Edge Rate
Data Input
Enable Input
(Dt DV)
20 ns V
50 ns V
Symbol
Parameter
VIH Input HIGH Voltage
OE
Other Inputs
VIL Input LOW Voltage
OE
Other Inputs
VCD Input Clamp Diode Voltage
VOH
Output HIGH Voltage
B Port
VOL Output LOW Voltage
IHOLD Bus Hold Current
A Port
B Port
A Port
A Port
B Port
IOFF
II
IIH a
IOZH
IIL a
IOZL
Output Current Power Down
Input Current Control Pins
Output Leakage Current
54ETL
74ETL
Output Leakage Current
ETL16245
Min Typ
Max
20
16
08
14
b1 2
VCC b 1
24
20
VCC b 1
24
20
04
08
0 55
09
100
b100
100
g10
g5
Units
V
V
V
V
V
V
V
V
V
V
V
V
V
mA
mA
mA
mA
VCC
Min
Min
Min
Min
Min
Min
00
55
55
Conditions
Recognized HIGH Signal
Recognized LOW Signal
IIN e b18 mA (OEn DIR)
IOH e b100 mA
IOH e b1 mA
IOH e b12 mA
IOH e b1 mA
IOH e b32 mA
IOH e b60 mA
IOL e 1 mA
IOL e 12 mA
IOL e 64 mA
IOL e 90 mA
OE e HIGH
VO e 0 8V
OE e HIGH
VO e 2 0V
VCC Bias e 0V
VI or VO s 4 5V
VIN e 0 or VCC
VIN e 0 or VCC
50 mA 5 5 VOUT e 2 7V OE e 2 0V
b50
mA 5 5 VOUT e 0 5V OE e 2 0V
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet 54ETL16245.PDF ] | |
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