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DM74ALS374N

Part # DM74ALS374N
Description IC D-TYPE POS TRG SNGL 20DIP
Category IC
Availability In Stock
Qty 8
Qty Price
1 + $0.30015
Manufacturer Available Qty
National Semiconductor Corp
Date Code: 9252
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National Semiconductor Corp
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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

© 2000 Fairchild Semiconductor Corporation DS006113 www.fairchildsemi.com
September 1986
Revised February 2000
DM74ALS374 Octal 3-STATE D-Type Edge-Triggered Flip-Flop
DM74ALS374
Octal 3-STATE D-Type Edge-Triggered Flip-Flop
General Description
This 8-bit register features totem-pole 3-STATE outputs
designed specifically for driving highly-capacitive or rela-
tively low-impedance loads. The high-impedance state and
increased high-logic-level drive provides this register with
the capability of being connected directly to and driving the
bus lines in a bus-organized system without need for inter-
face or pull-up components. It is particularly attractive for
implementing buffer registers, I/O ports, bidirectional bus
drivers, and working registers.
The eight flip-flops of the DM74ALS374 are edge-triggered
D-type flip-flops. On the positive transition of the clock, the
Q outputs will be set to the logic states that were set up at
the D inputs.
A buffered output control input can be used to place the
eight outputs in either a normal logic state (HIGH or LOW
logic levels) or a high-impedance state. In the high-imped-
ance state the outputs neither load nor drive the bus lines
significantly.
The output control does not affect the internal operation of
the flip-flops. That is, the old data can be retained or new
data can be entered even while the outputs are OFF.
Features
Switching specifications at 50 pF
Switching specifications guaranteed over full
temperature and V
CC
range
Advanced oxide-isolated, ion-implanted Schottky TTL
process
Functionally and pin-for-pin compatible with LS TTL
counterpart
Improved AC performance over DM74LS374 at approxi-
mately half the power
3-STATE buffer-type outputs drive bus lines directly
Ordering Code:
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Connection Diagram
Order Number Package Number Package Description
DM74ALS374WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
DM74ALS374SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
DM74ALS374N N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
www.fairchildsemi.com 2
DM74ALS374
Function Table
L = LOW State
H = HIGH State
X = Don’t Care
= Positive Edge Transition
Z = High Impedance State
Q
0
= Previous Condition of Q
Logic Diagram
Output
Control
Clock D
Output
Q
L HH
L LL
LLXQ
0
HXXZ
3 www.fairchildsemi.com
DM74ALS374
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
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
Note 2: This product meets application requirements of 500 temperature
cycles from 65°C to +150°C.
Recommended Operating Conditions
Note 3: The () arrow indicates the positive edge of the Clock is used for reference.
DC Electrical Characteristics
over recommended operating free air temperature range. All typical values are measured at V
CC
= 5V, T
A
= 25°C.
Supply Voltage 7V
Input Voltage 7V
Voltage Applied to Disabled Output 5.5V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range (Note 2) 65°C to +150°C
Typical θ
JA
N Package 60.0°C/W
M Package 79.0°C/W
Symbol Parameter Min Nom Max Units
V
CC
Supply Voltage 4.5 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 2.6 mA
I
OL
LOW Level Output Current 24 mA
f
CLOCK
Clock Frequency 0 35 MHz
t
W
Width of Clock Pulse HIGH 14 ns
LOW 14 ns
t
SU
Data Setup Time (Note 3) 10 ns
t
H
Data Hold Time (Note 3) 0 ns
T
A
Free Air Operating Temperature 0 70 °C
Symbol Parameter Conditions Min Typ Max Units
V
IK
Input Clamp Voltage V
CC
= 4.5V, I
I
= 18 mA 1.5 V
V
OH
HIGH Level Output V
CC
= 4.5V I
OH
= Max 2.4 3.2 V
Voltage V
CC
= 4.5V to 5.5V I
OH
= 400 µAV
CC
2V
V
OL
LOW Level Output V
CC
= 4.5V I
OL
= 12 mA 0.25 0.4 V
Voltage I
OL
= 24 mA 0.35 0.5 V
I
I
Input Current @ Max. V
CC
= 5.5V, V
IH
= 7V
0.1 mA
Input Voltage
I
IH
HIGH Level Input Current V
CC
= 5.5V, V
IH
= 2.7V 20 µA
I
IL
LOW Level Input Current V
CC
= 5.5V, V
IL
= 0.4V 0.2 mA
I
O
Output Drive Current V
CC
= 5.5V V
O
= 2.25V 30 112 mA
I
OZH
OFF-State Output Current, V
CC
= 5.5V, V
O
= 2.7V
20 µA
HIGH Level Voltage Applied
I
OZL
OFF-State Output Current, V
CC
= 5.5V, V
O
= 0.4V
20 µA
LOW Level Voltage Applied
I
CC
Supply Current V
CC
= 5.5V Outputs HIGH 11 19 mA
Outputs Open Outputs LOW 19 28 mA
Outputs Disabled 20 31 mA
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