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October 1987
Revised January 1999
MM74C914 Hex Schmitt Trigger with Extended Input Voltage
© 1999 Fairchild Semiconductor Corporation DS005917.prf www.fairchildsemi.com
MM74C914
Hex Schmitt Trigger with Extended Input Voltage
General Description
The MM74C914 is a monolithic CMOS Hex Schmitt t r igger
with special input protection scheme. This scheme allows
the input voltage levels to exceed V
CC
or ground by at least
10V (V
CC
−25V to GND + 25V), and is valuable for applica-
tions involving voltage level shifting or mismatched power
supplies.
The positive and negative-going threshold voltages, V
T+
and VT−, show low variation with respect to temperature
(typ 0.0005V/°C at V
CC
= 1 0V). And the hysteresis, VT+ −
V
T−
≥ 0.2 VCC is guaranteed.
Features
■ Hysteresis: 0.45 VCC (typ.) 0.2 VCCguaranteed
■ Special input protection: Extended Input Voltage
Range
■ Wide supply voltage range: 3V to 15V
■ High noise immunity: 0.7 V
CC
(typ.)
■ Low power TTL compatibility: Fan out of 2 driving 74L
Ordering Code:
Device also available in Tape and Reel. Specify by appendin g s uf f ix let t er “X” to the ordering co de.
Connection Diagrams
Pin Assignments for DIP
Top View
Special Input Protection
8V ≈ 25V
for the diodes.
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
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MM74C914
Absolute Maximum Ratings(Note 1)
Note 1: “Absolute Maxi mum Ratings” are those valu es beyond which the
safety of the device cannot be guaranteed. Ex ce pt for “O perating Temperature Range”, they are not mean t to imply that the device s should be operated at these limits. The Electrical Charac t eristics tables provide co nditions
for actual device operation.
DC Electrical Characteristics
Min/Max limits apply across temperature range unless otherwise noted
Note 2: Only one input is at ½ VCC, the others are either at VCC or GND.
Voltage at any Input Pin VCC − 25V to GND + 25V
Voltage at any other Pin −0.3Vto V
CC
+ 0.3V
Operating Temperature Range (T
A
) −40°C to +85°C
Storage Temperature Range (T
S
) −65°C to +150°C
Power Dissipation
Dual-In-Line 700 mW
Small Outline 500mW
Operating V
CC
Range 3V to 15V
Absolute Maximum (V
CC
) 18V
Lead Temperature (T
L
)
(Soldering, 10 seconds) 300°C
Symbol Parameter Conditions Min Typ Max Units
CMOS TO CMOS
V
T+
Positive Going Threshold Voltage VCC = 5V 3.0 3.6 4.3 V
VCC = 10V 6.0 6.8 8.6 V
VCC = 15V 9.0 10 12.9
V
T−
Negative Going Threshold Voltage 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
VT+ − V
T−
Hysteresis VCC = 5V 1.0 2.2 3.6 V
VCC = 10V 2.0 3.6 7.2 V
VCC = 15V 3.0 5 10.8 V
V
OUT(1)
Logical“1” Output Voltage VCC = 5V, IO = −10 µA4.5 V
VCC = 10V, IO = −10 µA9.0 V
V
OUT(0)
Logical “0” Output Voltage VCC = 5V, IO = +10 µA0.5V
VCC = 10V, IO = +10 µA1.0V
I
IN(1)
Logical “1” Input Current VCC = 15V, VIN = 25V 0.005 5.0 µA
I
IN(0)
Logical “0” Input Current VCC = 15V, VIN = −10V −100 −0.005 µA
I
CC
Supply Current VCC = 15V, VIN = − 10V/25V 0.05 300 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
V
IN(1)
Logical “1” Input Voltage VCC = 5V 4.3 V
V
IN(0)
Logical “0” Input Voltage VCC = 5V 0.7 V
V
OUT(1)
Logical “1” Output Voltage VCC = 4.75V, IO = −360 µA2.4 V
V
OUT(0)
Logical “0” Output Voltage VCC = 4.75V, IO = 360 µA0.4V
OUTPUT DRIVE (See Family Characteristics Data Sheet) (Short Circuit Current)
I
SOURCE
Output Source Current VCC = 5V, V
OUT
= 0V, TA = 25°C −1.75 −3.3 mA
(P-Channel)
I
SOURCE
Output Source Current VCC = 10V, V
OUT
= 0V, TA = 25°C −8.0 −15 mA
(P-Channel)
I
SINK
Output Sink Current VCC = 5V, V
OUT
= VCC, TA = 25°C 1.75 3.6 mA
(N-Channel)
I
SINK
Output Sink Current VCC = 10V, V
OUT
= VCC, TA = 25°C8.016 mA
(N-Channel)
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MM74C914
AC Electrical Characteristics (Note 3)
T
A
= 25°C, CL = 50 pF, unless otherwise specified
Note 3: AC Parameters are guaranteed by DC correlated testing.
Note 4: Capacitance is guaranteed by periodic testing.
Note 5: C
PD
determines th e no load AC power con sumption of any CMOS device. For comp lete explanatio n see Family Characte ristics App lication No te,
AN-90.
Typical Performance Characteristics
Typical Transfer Characteristics
Guaranteed Trip Point Range
Typical Application
Note: V
CC1
= V
CC2
GND1 = GND2
Symbol Parameter Conditions Min Typ Max Units
t
PHL
Propagation Delay from Input to Output VCC = 5V 220 400 ns
t
PLH
VCC = 10V 80 200 ns
C
IN
Input Capacitance Any Input (Note 4) 5 pF
C
PD
Power Dissipation Capacitance Per Gate (Note 5) 20 pF
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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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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 speci fications.
MM74C914 Hex Schmitt Trigger with Extended Input Voltage
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:
1. Life support devices or system s a re devices or syste ms
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be reasonably expected to result in a significant injur y to the
user.
2. A critical compon ent in any com ponent of a li fe support
device or system whose failure to p erform can be r easonably expected to cause the failure of the life suppor t
device or system, or to affect its safety or effectiveness.
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Package Number N14A
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