DM74ALS5245N

© 2000 Fairchild Semiconductor Corporation DS009175 www.fairchildsemi.com
October 1986
Revised February 2000
DM74ALS5245 Octal 3-STATE Transceiver
DM74ALS5245
Octal 3-STATE Transceiver
General Description
This octal bus transceiver is designed for asynchronous
two-way communication between data buses. The inputs
include hysteresis which provides improved noise rejec-
tion. Data is transmitted either from the A bus to the B bus
or from the B bus to the A bus depending on the logic level
of the direction control (DIR) input. The device can be dis-
abled via the enable input (G
) which causes the outputs to
enter the high impedance mode so the buses are effec-
tively isolated.
Features
Input Hysteresis
Low output noise generation
High input noise immunity
Advanced oxide-isolated, ion implanted Schottky TTL
process
Switching specification guaranteed over the full temper-
ature and V
CC
range
PNP inputs to reduce input loading
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Function Table
L = LOW Logic Level H = HIGH Logic Level X = Don't Care (Either LOW or HIGH Logic Level)
Order Number Package Number Package Description
DM74ALS5245WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
DM74ALS5245SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
DM74ALS5245N N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Control Inputs
Operation
G
DIR
L L B Data to A Bus
L H A Data to B Bus
H X High Impedance
www.fairchildsemi.com 2
DM74ALS5245
Absolute Maximum Ratings(Note 1)
Note 1: 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
Characteristic tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
Recommended Operating Conditions
Electrical Characteristics
over recommended free air temperature range. All typical values are measured at V
CC
= 5V, T
A
= 25°C.
Note 2: Plastic DIP package.
Note 3: n = number of device outputs; n1 outputs switching, each driven 0V to 3V one output @ GND.
Note 4: n = number of device outputs; n outputs switching, n1 inputs switching 0V to 3V. Input under test switching 3V to threshold (V
ILD
); 0V to threshold
(V
IHD
); f = 1 MHz.
Supply Voltage 7V
Input Voltage
Control Inputs 7V
I/O Ports 5.5V
Operating Free-Air Temperature Range 0°C to +70°C
Storage Temperature Range 65°C to +150°C
Typical θ
JA
N Package 56.0°C/W
M Package 74.0°C/W
Symbol Parameter Min Max Units
V
CC
Supply Voltage 4.5 5.5 V
V
IH
HIGH Level Input Voltage 2 V
V
IL
LOW Level Input Voltage 0.8 V
I
OH
HIGH Level Output Current 15 mA
I
OL
LOW Level Output Current 24 mA
T
A
Free Air Operating Temperature Range 0 70 °C
Symbol Parameter Test Conditions Min Typ Max Units
V
IK
Input Clamp Voltage V
CC
= Min, I
I
= 18 mA 1.5 V
H
YS
Hysteresis (V
T+
V
T
)V
CC
= Min 0.2 0.32 V
V
OH
HIGH Level V
CC
= 4.5V to 5.5V I
OH
= 0.4 mA V
CC
2
Output Voltage V
CC
= Min I
OH
= 3 mA 2.4 3.2 V
I
OH
= Max 2
V
OL
LOW Level V
CC
= Min I
OL
= 12 mA 0.25 0.4
V
Output Voltage I
OL
= 24 mA 0.35 0.5
I
I
Input Current at V
CC
= Max I/O Ports, V
I
= 5.5V 100
µA
Maximum Input Voltage Control Inputs, V
I
= 7V 100
I
IH
HIGH Level Input Current V
CC
= Max, V
I
= 2.7V 20 µA
I
IL
LOW Level Input Current V
CC
= Max, V
I
= 0.4V 100 µA
I
O
Output Drive Current V
CC
= Max, V
O
= 2.25V 30 112 mA
I
CC
Supply Current V
CC
= Max Outputs HIGH 30 45
Outputs LOW 36 55 mA
Outputs Disabled 38 58
V
OLP
Quiet Output Maximum V
CC
= 5.0V, T
A
= 25°C
0.5 V
Dynamic V
OL
(Figures 1, 2; (Note 2)(Note 3))
V
OLV
Quiet Output Minimum V
CC
= 5.0V, T
A
= 25°C
0.2 V
Dynamic V
OL
(Figures 1, 2; (Note 2)(Note 3))
V
IHD
Minimum High Level V
CC
= 5.0V, T
A
= 25°C
1.6 V
Dynamic Input Voltage (Note 2)(Note 4)
V
ILD
Maximum Low Level V
CC
= 5.0V, T
A
= 25°C
1.0 V
Dynamic Input Voltage (Note 2)(Note 4)
3 www.fairchildsemi.com
DM74ALS5245
Switching Characteristics
over recommended operating free air temperature range
Symbol Parameter Conditions
From (Input)
Min Max Units
To (Output)
t
PLH
Propagation Delay Time V
CC
= 4.5V to 5.5V,
A or B to B or A 3 10 ns
LOW-to-HIGH Level Output R
1
= R
2
= 500,
t
PHL
Propagation Delay Time C
L
= 50 pF
A or B to B or A 3 10 ns
HIGH-to-LOW Level Output
t
PZH
Output Enable Time
G to A or B 5 20 ns
to HIGH Level Output
t
PZL
Output Enable Time
G to A or B 5 20 ns
to LOW Level Output
t
PHZ
Output Disable Time
G to A or B 2 10 ns
from HIGH Level Output
t
PLZ
Output Disable Time
G to A or B 4 15 ns
from LOW Level Output

DM74ALS5245N

Mfr. #:
Manufacturer:
ON Semiconductor
Description:
IC BUF NON-INVERT 5.5V 20DIP
Lifecycle:
New from this manufacturer.
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