Fairchild Semiconductor MM74C914M, MM74C914N, MM74C914MX Datasheet
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
www.fairchildsemi.com 2
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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