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DM7438N

Part # DM7438N
Description Logic Gates Qd 2-Input NAND Buff
Category IC
Availability In Stock
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Fairchild Semiconductor
Date Code: 8235
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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.

© 2001 Fairchild Semiconductor Corporation DS006513 www.fairchildsemi.com
September 1986
Revised July 2001
DM7438 • 7438 Quad 2-Input NAND Buffers with Open-Collector Outputs
DM7438 7438
Quad 2-Input NAND Buffers with Open-Collector Outputs
General Description
This device contains four independent gates each of which
performs the logic NAND function. The open-collector out-
puts require external pull-up resistors for proper logical
operation.
Pull-Up Resistor Equations
Where: N
1
(I
OH
) = total maximum output high current
for all outputs tied to pull-up resistor
N
2
(I
IH
) = total maximum input high current for
all inputs tied to pull-up resistor
N
3
(I
IL
) = total maximum input low current for
all inputs tied to pull-up resistor
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram Function Table
Y = AB
H = HIGH Logic Level
L = LOW Logic Level
Order Number Package Number Package Description
DM7438M M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
DM7438N N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
7438SJ M14D 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Inputs Output
ABY
LLH
LHH
HLH
HHL
www.fairchildsemi.com 2
DM7438 7438
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.
Recommended Operating Conditions
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Switching Characteristics
at V
CC
= 5V and T
A
= 25°C
Note 2: All typicals are at V
CC
= 5V, T
A
= 25°C.
Supply Voltage 7V
Input Voltage 5.5V
Output Voltage 7V
Operating Free Air Temperature Range 0
°C to +70°C
Storage Temperature Range
65°C to +150°C
Symbol Parameter Min Nom Max Units
V
CC
Supply Voltage 4.75 5 5.25 V
V
IH
HIGH Level Input Voltage 2 V
V
IL
LOW Level Input Voltage 0.8 V
V
OH
HIGH Level Output Voltage 5.5 V
I
OL
LOW Level Output Current 48 mA
T
A
Free Air Operating Temperature 0 70 °C
Symbol Parameter Conditions Min
Typ
Max Units
(Note 2)
V
I
Input Clamp Voltage V
CC
= Min, I
I
= 12 mA 1.5 V
I
CEX
HIGH Level V
CC
= Min, V
O
= 5.5V
250 µA
Output Current V
IL
= Max
V
OL
LOW Level V
CC
= Min, I
OL
= Max
0.4 V
Output Voltage V
IH
= Min
I
I
Input Current @ Max Input Voltage V
CC
= Max, V
I
= 5.5V 1 mA
I
IH
HIGH Level Input Current V
CC
= Max, V
I
= 2.4V 40 µA
I
IL
LOW Level Input Current V
CC
= Max, V
I
= 0.4V 1.6 mA
I
CCH
Supply Current with Outputs HIGH V
CC
= Max 5 8.5 mA
I
CCL
Supply Current with Outputs LOW V
CC
= Max 34 54 mA
Symbol Parameter Conditions Min Max Units
t
PLH
Propagation Delay Time C
L
= 45 pF
22 ns
LOW-to-HIGH Level Output R
L
= 133
t
PHL
Propagation Delay Time
18 ns
HIGH-to-LOW Level Output
3 www.fairchildsemi.com
DM7438 7438
Physical Dimensions inches (millimeters) unless otherwise noted
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
Package Number M14A
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