74VHC221AMX Fairchild Semiconductor, 74VHC221AMX Datasheet

MULTIVIBRATOR DUAL MONO 16SOIC

74VHC221AMX

Manufacturer Part Number
74VHC221AMX
Description
MULTIVIBRATOR DUAL MONO 16SOIC
Manufacturer
Fairchild Semiconductor
Series
74VHCr
Datasheet

Specifications of 74VHC221AMX

Logic Type
Monostable
Independent Circuits
2
Schmitt Trigger Input
No
Propagation Delay
8.1ns
Current - Output High, Low
8mA, 8mA
Voltage - Supply
2 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
©1994 Fairchild Semiconductor Corporation
74VHC221A Rev. 1.2
74VHC221A
Dual Non-Retriggerable Monostable Multivibrator
Features
Ordering Information
Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the
ordering code.
74VHC221AM
74VHC221ASJ
74VHC221AMTC
High Speed: t
Low Power Dissipation: I
Active State: I
High Noise Immunity: V
Power down protection is provided on all inputs
Pin and function compatible with 74HC221A
Order Number
PD
CC
8.1ns (Typ.) at V
600µA (Max.) at T
Package
Number
MTC16
NIH
M16D
M16A
CC
V
4µA (Max.) at T
NIL
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm
Wide
CC
28% V
A
5V
25°C
CC
A
(Min.)
25°C
General Description
The VHC221A is an advanced high speed CMOS
Monostable Multivibrator fabricated with silicon gate
CMOS technology. It achieves the high speed operation
similar to equivalent Bipolar Schottky TTL while main-
taining the CMOS low power dissipation. Each multi-
vibrator features both a negative, A, and a positive, B,
transition triggered input, either of which can be used as
an inhibit input. Also included is a clear input that when
taken LOW resets the one-shot. The VHC221A can be
triggered on the positive transition of the clear while A is
held LOW and B is held HIGH. The VHC221A is non-
retriggerable, and therefore cannot be retriggered until
the output pulse times out. The output pulse width is
determined by the equation:
PW
where,
PW is in seconds, R is in ohms, and C is in farads.
Limits for R
External capacitor, C
External resistors, R
An input protection circuit ensures that 0 to 7V can be
applied to the input pins without regard to the supply
voltage. This device can be used to interface 5V to 3V
systems and two supply systems such as battery back
up. This circuit prevents device destruction due to mis-
matched supply and input voltages.
Package Description
(Rx)(Cx)
x
and C
x
x
x
: V
: No limit
are:
V
CC
CC
2.0V, 5k Min.
3.0V, 1 k Min
www.fairchildsemi.com
May 2007
tm

Related parts for 74VHC221AMX

74VHC221AMX Summary of contents

Page 1

... M16D 74VHC221AMTC MTC16 Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. ©1994 Fairchild Semiconductor Corporation 74VHC221A Rev. 1.2 General Description 5V The VHC221A is an advanced high speed CMOS CC Monostable Multivibrator fabricated with silicon gate 4µ ...

Page 2

... H HIGH Voltage Level L LOW Voltage Level HIGH-to-LOW Transition LOW-to-HIGH Transition X = Don’t Care ©1994 Fairchild Semiconductor Corporation 74VHC221A Rev. 1.2 Block Diagrams Note A: Cx, Rx, Dx are external Capacitor, Resistor, and Diode, respectively. Note B: External clamping diode, Dx; External capacitor is charged to V state, i.e. when no trigger is applied. ...

Page 3

... System Diagram Timing Chart ©1994 Fairchild Semiconductor Corporation 74VHC221A Rev. 1.2 3 www.fairchildsemi.com ...

Page 4

... Rx/Cx node N starts rising at a rate determined by the time constant of external capacitor Cx and resistor Rx. ©1994 Fairchild Semiconductor Corporation 74VHC221A Rev. 1.2 Upon triggering, output Q becomes HIGH, following some delay time of the internal F/F and gates. It stays ...

Page 5

... Unused inputs must be held HIGH or LOW. They may not float. 2. The maximum allowable values of Cx and Rx are a function of the leakage of capacitor Cx, the leakage of the device, and leakage due to board layout and surface resistance. Susceptibility to externally induced noise signals may occur for Rx ©1994 Fairchild Semiconductor Corporation 74VHC221A Rev. 1.2 Parameter (1) Parameter 1 M ...

Page 6

... Input Leakage 0–5.5 IN Current I Rx/Cx Terminal 5.5 IN Off-State Current I Quiescent Supply 5.5 CC Current (3) I Active—State 3.0 CC Supply Current 4.5 5.5 Note: 3. Per circuit. ©1994 Fairchild Semiconductor Corporation 74VHC221A Rev. 1.2 T (V) Conditions Min. 1.50 0 –50µA 1 2.9 4.4 I –4mA 2.58 ...

Page 7

... I : Active Supply Current CC Duty Operating Requirement Symbol Parameter t (L) Minimum Trigger W t (H) Pulse Width W t (L) Minimum Clear Pulse Width W ©1994 Fairchild Semiconductor Corporation 74VHC221A Rev. 1.2 (4) V (V) Conditions CC 3.3 ± 0.3 C 15pF L C 50pF L 5.0 ± 0.5 C 15pF L C 50pF L 3.3 ± 0.3 C ...

Page 8

... Device Characteristics Output Pulse Width Constant K-Supply Voltage (Typical) ©1994 Fairchild Semiconductor Corporation 74VHC221A Rev. 1 Characteristics (Typ.) wout x Input Equivalent Circuit 8 www.fairchildsemi.com ...

Page 9

... Physical Dimensions Dimensions are in millimeters unless otherwise noted. Figure 1. 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow ©1994 Fairchild Semiconductor Corporation 74VHC221A Rev. 1.2 Package Number M16A 9 www.fairchildsemi.com ...

Page 10

... Physical Dimensions (Continued) Dimensions are in millimeters unless otherwise noted. Figure 2. 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide ©1994 Fairchild Semiconductor Corporation 74VHC221A Rev. 1.2 Package Number M16D 10 www.fairchildsemi.com ...

Page 11

... Physical Dimensions (Continued) Dimensions are in millimeters unless otherwise noted. 5.00±0.10 4.55 0.11 MTC16rev4 Figure 3. 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide ©1994 Fairchild Semiconductor Corporation 74VHC221A Rev. 1.2 0.65 4.4±0.1 1.45 Package Number MTC16 11 5.90 4 ...

Page 12

... TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended exhaustive list of all such trademarks. ® ACEx Across the board. Around the world.™ ActiveArray™ Bottomless™ Build it Now™ CoolFET™ CROSSVOLT™ ...

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