Fairchild DM7405 service manual
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DM7405
Hex Inverters with Open-Collector Outputs
DM7405 Hex Inverters with Open-Collector Outputs
December 1986
Revised February 2000
General Description
This device contain s six independe nt gates eac h of which
performs the logic INVERT function. The open-collector
outputs require exter nal pull-up r esistors for pr oper logical
operation.
Pull-Up Resistor Equations
Where: N1 (IOH) = total maximum output high c urrent
N
for all outputs tied to pull-up resistor
(IIH) = total maximum input high current for
2
all inputs tied to pull-up resistor
(IIL) = total maximum input low current for
N
3
all inputs tied to pull-up resistor
Ordering Code:
Order Number Package Number Package Description
DM7405N N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Connection Diagram Function Table
Y = A
Input Output
AY
LH
HL
H = HIGH Logic Level
L = LOW Logic Level
© 2000 Fairchild Semiconductor Corporation DS006495 www.fairchildsemi.com
Absolute Maximum Ratings(Note 1)
Supply Voltage 7V
DM7405
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
Note 1: The “Absolute Maximum Ratings” are those values beyond which
the safety of the dev ice cannot be guaranteed. T he device sh ould not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommend ed O peratin g Cond itions” t able w ill defin e the c ondit ions
for actual device operation.
Recommended Operating Conditions
Symbol Parameter Min Nom Max Units
V
CC
V
IH
V
IL
V
OH
I
OL
T
A
Supply Voltage 4.75 5 5.25 V
HIGH Level Input Voltage 2 V
LOW Level Input Voltage 0.8 V
HIGH Level Output Voltage 5.5 V
LOW Level Ou tput Current 16 mA
Free Air Operating Temperature 0 70 °C
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol Parameter Conditions Min
V
I
I
CEX
V
OL
I
I
I
IH
I
IL
I
CCH
I
CCL
Note 2: All typicals are at VCC = 5V, TA = 25°C.
Input Clamp Voltage VCC = Min, II = −12 mA −1.5 V
HIGH Level VCC = Min, VO = 5.5V
Output Current VIL = Max
LOW Level VCC = Min, IOL = Max
Output Voltage VIH = Min
Input Current @ Max Input Voltage VCC = Max, VI = 5.5V 1 mA
HIGH Level Input Current VCC = Max, VI = 2.4V 40 µA
LOW Level Input Current VCC = Max, VI = 0.4V −1.6 mA
Supply Current with Outputs HIGH VCC = Max 6 12 mA
Supply Current with Outputs LOW VCC = Max 18 33 mA
Typ
(Note 2)
0.2 0.4 V
Max Units
250 µA
Switching Characteristics
at VCC = 5V and TA = 25°C
Symbol Paramete r Conditions Min Max Units
t
PLH
t
PHL
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Propagation Delay Time CL = 15 pF
LOW-to-HIGH Level Output RL = 4 kΩ (t
Propagation Delay Time RL = 400Ω (t
HIGH-to-LOW Level Output
PLH
PHL
)
)
55 ns
15 ns
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