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National Semiconductor Electronic Components Datasheet

DM74173 Datasheet

Quad D Registers

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DM74173 pdf
June 1989
54173 DM54173 DM74173
TRI-STATE Quad D Registers
General Description
These four-bit registers contain D-type flip-flops with totem-
pole TRI-STATE outputs capable of driving highly capaci-
tive or low-impedance loads The high-impedance state and
increased high-logic-level drive provide these flip-flops with
the capability of driving the bus lines in a bus-organized sys-
tem without need for interface or pull-up components
Gated enable inputs are provided for controlling the entry of
data into the flip-flops When both data-enable inputs are
low data at the D inputs are loaded into their respective flip-
flops on the next positive transition of the buffered clock
input Gate output control inputs are also provided When
both are low the normal logic states of the four outputs are
available for driving the loads or bus lines The outputs are
disabled independently from the level of the clock by a high
logic level at either output control input The outputs then
present a high impedance and neither load nor drive the bus
line Detailed operation is given in the function table
To minimize the possibility that two outputs will attempt to
take a common bus to opposite logic levels the output con-
trol circuitry is designed so that the average output disable
times are shorter than the average output enable times
Features
Y TRI-STATE outputs interface directly with system bus
Y Gated output control lines for enabling or disabling the
outputs
Y Fully independent clock elminates restrictions for oper-
ating in one of two modes
Parallel load
Do nothing (hold)
Y For application as bus buffer registers
Y Typical propagation delay 18 ns
Y Typical frequency 30 MHz
Y Typical power dissipation 250 mW
Y Alternate Military Aerospace device (54173) is avail-
able Contact a National Semiconductor Sales Office
Distributor for specifications
Connection Diagram
Function Table
Dual-In-Line Package
Clear Clock
HX
LL
Lu
Lu
Lu
Lu
Inputs
Data Enable
G1 G2
XX
XX
HX
XH
LL
LL
Output
Data
Q
D
XL
X Q0
X Q0
X Q0
LL
HH
When either M or N (or both) is (are) high the output is disabled to the
high-impedance state however sequential operation of the flip-flops is
not affected
H e high level (steady state)
L e low level (steady state)
u e low-to-high level transition
X e don’t care (any input including transitions)
Q0 e the level of Q before the indicated steady state input conditions were
established
TL F 6556 – 1
Order Number 54173DMQB 54173FMQB
DM54173J DM54173W or DM74173N
See NS Package Number J16A N16E or W16A
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL F 6556
RRD-B30M105 Printed in U S A


National Semiconductor Electronic Components Datasheet

DM74173 Datasheet

Quad D Registers

No Preview Available !

DM74173 pdf
Absolute Maximum Ratings (Note)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage
7V
Input Voltage
5 5V
Operating Free Air Temperature Range
DM54 and 54
b55 C to a125 C
DM74
0 C to a70 C
Storage Temperature Range
b65 C to a150 C
Note The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaran-
teed 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
Symbol
VCC
VIH
VIL
IOH
IOL
fCLK
tW
tSU
tH
tREL
TA
Parameter
Supply Voltage
High Level Input Voltage
Low Level Input Voltage
High Level Output Current
Low Level Output Current
Clock Frequency (Note 4)
Pulse Width
(Note 4)
Clock
Clear
Setup Time
(Note 4)
Enable
Data
Hold Time
(Note 4)
Enable
Data
Clear Release Time (Note 4)
Free Air Operating Temperature
DM54173
Min Nom
45 5
2
0
20
20
17
10
2
10
10
b55
Max
55
08
b2
16
25
125
DM74173
Min Nom Max
4 75 5
5 25
2
08
b5 2
16
0 25
20
20
17
10
2
10
10
0 70
Units
V
V
V
mA
mA
MHz
ns
ns
ns
ns
C
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
Typ
(Note 1)
Max
Units
VI Input Clamp Voltage
VOH
High Level Output
Voltage
VOL Low Level Output
Voltage
II Input Current Max
Input Voltage
VCC e Min II e b12 mA
VCC e Min IOH e Max
VIL e Max VIH e Min
VCC e Min IOL e Max
VIH e Min VIL e Max
VCC e Max VI e 5 5V
24
b1 5
04
1
V
V
V
mA
IIH
IIL
IOZH
IOZL
IOS
High Level Input Current
Low Level Input Current
Off-State Output Current with High
Level Output Voltage Applied
Off-State Output Current with Low
Level Output Voltage Applied
Short Circuit
Output Current
VCC e Max VI e 2 4V
VCC e Max VI e 0 4V
VCC e Max VO e 2 4V
VIH e Min VIL e Max
VCC e Max VO e 0 4V
VIH e Min VIL e Max
VCC e Max
(Note 2)
DM54
DM74
b30
b30
40
b1 6
40
b40
b70
b70
mA
mA
mA
mA
mA
ICC Supply Current
VCC e Max (Note 3)
50 72 mA
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
Note 3 ICC is measured with all outputs open CLEAR grounded after a momentary connection to 4 5V N G1 G2 and all DATA inputs grounded and the CLOCK
input and M input at 4 5V
Note 4 TA e 25 C and VCC e 5V
2


Part Number DM74173
Description Quad D Registers
Maker National Semiconductor
Total Page 6 Pages
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