Revised January 1999
MM74C914
Hex Schmitt Trigger with Extended Input Voltage
General Description
The MM74C914 is a monolithic CMOS Hex Schmitt trigger
with special input protection scheme. This scheme allows
the input voltage levels to exceed VCC or ground by at least
10V (VCC −25V to GND + 25V), and is valuable for applications involving voltage level shifting or mismatched power
supplies.
The positive and negative-going threshold voltages, VT+
and VT−, show low variation with respect to temperature
(typ 0.0005V/°C at VCC = 10V). And the hysteresis, VT+ −
VT− ≥ 0.2 VCC is guaranteed.
Features
■ Hysteresis:
■ Special
Range
0.45 VCC (typ.) 0.2 VCCguaranteed
input
protection: Extended
Input
Voltage
■ Wide supply voltage range: 3V to 15V
■ High noise immunity: 0.7 VCC (typ.)
■ Low power TTL compatibility:
Fan out of 2 driving 74L
Ordering Code:
Order Number
Package Number
Package Description
MM74C914M
M14A
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150” Narrow
MM74C914N
N14A
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Connection Diagrams
Pin Assignments for DIP
Special Input Protection
Top View
8V ≈ 25V
for the diodes.
© 1999 Fairchild Semiconductor Corporation
DS005917.prf
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MM74C914 Hex Schmitt Trigger with Extended Input Voltage
October 1987
MM74C914
Absolute Maximum Ratings(Note 1)
Voltage at any Input Pin
VCC − 25V to GND + 25V
Voltage at any other Pin
−0.3Vto VCC + 0.3V
Operating Temperature Range (TA)
Storage Temperature Range (TS)
Operating VCC Range
(Soldering, 10 seconds)
−65°C to +150°C
700 mW
500mW
300°C
Note 1: “Absolute Maximum Ratings” are those values beyond which the
safety of the device cannot be guaranteed. Except for “Operating Temperature Range”, they are not meant to imply that the devices should be operated at these limits. The Electrical Characteristics tables provide conditions
for actual device operation.
Power Dissipation
Small Outline
18V
Lead Temperature (TL)
−40°C to +85°C
Dual-In-Line
3V to 15V
Absolute Maximum (VCC)
DC Electrical Characteristics
Min/Max limits apply across temperature range unless otherwise noted
Symbol
Parameter
Conditions
Min
Typ
Max
Units
CMOS TO CMOS
VT+
VT−
VT+ − VT−
Positive Going Threshold Voltage
Negative Going Threshold Voltage
Hysteresis
VCC = 5V
3.0
3.6
4.3
V
VCC = 10V
6.0
6.8
8.6
V
12.9
VCC = 15V
9.0
10
VCC = 5V
0.7
1.4
2.0
V
VCC = 10V
1.4
3.2
4.0
V
VCC = 15V
2.1
5
6.0
VCC = 5V
1.0
2.2
3.6
V
VCC = 10V
2.0
3.6
7.2
V
5
10.8
VCC = 15V
3.0
VCC = 5V, IO = −10 µA
4.5
VCC = 10V, IO = −10 µA
9.0
VOUT(1)
Logical“1” Output Voltage
VOUT(0)
Logical “0” Output Voltage
VCC = 5V, IO = +10 µA
IIN(1)
Logical “1” Input Current
VCC = 15V, VIN = 25V
IIN(0)
Logical “0” Input Current
VCC = 15V, VIN = −10V
ICC
Supply Current
VCC = 15V, VIN = − 10V/25V
V
0.5
VCC = 10V, IO = +10 µA
0.005
−100
V
V
1.0
V
5.0
µA
−0.005
0.05
V
µA
300
µA
VCC = 5V, VIN = − 2.5V (Note 2)
20
µA
VCC = 10V, VIN = 5V (Note 2)
200
µA
VCC = 15V, VIN = 7.5V (Note 2)
600
µA
CMOS/LPTTL INTERFACE
VIN(1)
Logical “1” Input Voltage
VCC = 5V
VIN(0)
Logical “0” Input Voltage
VCC = 5V
VOUT(1)
Logical “1” Output Voltage
VCC = 4.75V, IO = −360 µA
VOUT(0)
Logical “0” Output Voltage
VCC = 4.75V, IO = 360 µA
4.3
V
0.7
2.4
V
V
0.4
V
OUTPUT DRIVE (See Family Characteristics Data Sheet) (Short Circuit Current)
ISOURCE
Output Source Current
VCC = 5V, VOUT = 0V, TA = 25°C
−1.75
−3.3
mA
VCC = 10V, VOUT = 0V, TA = 25°C
−8.0
−15
mA
VCC = 5V, VOUT = VCC, TA = 25°C
1.75
3.6
mA
VCC = 10V, VOUT = VCC, TA = 25°C
8.0
16
mA
(P-Channel)
ISOURCE
Output Source Current
(P-Channel)
ISINK
Output Sink Current
(N-Channel)
ISINK
Output Sink Current
(N-Channel)
Note 2: Only one input is at ½ VCC, the others are either at VCC or GND.
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2
(Note 3)
Symbol
tPHL
Parameter
Conditions
Min
Typ
Max
Units
220
400
ns
VCC = 10V
80
200
Propagation Delay from Input to Output VCC = 5V
tPLH
ns
CIN
Input Capacitance
Any Input (Note 4)
5
pF
CPD
Power Dissipation Capacitance
Per Gate (Note 5)
20
pF
Note 3: AC Parameters are guaranteed by DC correlated testing.
Note 4: Capacitance is guaranteed by periodic testing.
Note 5: CPD determines the no load AC power consumption of any CMOS device. For complete explanation see Family Characteristics Application Note,
AN-90.
Typical Performance Characteristics
Typical Transfer Characteristics
Guaranteed Trip Point Range
Typical Application
Note: VCC1 = VCC2
GND1 = GND2
3
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MM74C914
AC Electrical Characteristics
TA = 25°C, CL = 50 pF, unless otherwise specified
MM74C914
Physical Dimensions inches (millimeters) unless otherwise noted
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150” Narrow
Package Number M14A
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4
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Package Number N14A
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
2. A critical component in any component of a life support
1. Life support devices or systems are devices or systems
device or system whose failure to perform can be reawhich, (a) are intended for surgical implant into the
sonably expected to cause the failure of the life support
body, or (b) support or sustain life, and (c) whose failure
device or system, or to affect its safety or effectiveness.
to perform when properly used in accordance with
instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the
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user.
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.
MM74C914 Hex Schmitt Trigger with Extended Input Voltage
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
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