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Toshiba Electronic Components Datasheet

TC74VHC221AFT Datasheet

DUAL MONOSTABLE MULTIVIBRATOR

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TC74VHC123,221AF/AFN/AFT/AFK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74VHC123AF,TC74VHC123AFN,TC74VHC123AFT,TC74VHC123AFK
TC74VHC221AF,TC74VHC221AFN,TC74VHC221AFT,TC74VHC221AFK
Dual Monostable Multivibrator
TC74VHC123AF/AFN/AFT/AFK Retriggerble
TC74VHC221AF/AFN/AFT/AFK
Non-Retriggerble
Note: xxxFN (JEDEC SOP) is not available in
Japan.
TC74VHC123AF, TC74VHC221AF
The TC74VHC123A/221A are high speed CMOS
MONOSTABLE MULTIVIBRATOR fabricated with silicon gate
C2MOS technology.
There are two trigger inputs, A input (negative edge), and B
input (positive edge). These inputs are valid for a slow rise/fall
time signal (tr = tf = 1 s) as they are schmitt trigger inputs. This
device may also be triggered by using CLR input (positive
edge).
After triggering, the output stays in a MONOSTABLE state for
a time period determined by the external resistor and capacitor
(RX, CX). A low level at the CLR input breaks this state.
Limits for CX and RX are:
External capacitor, CX: No limit
External resistor, RX: VCC = 2.0 V more than 5 kΩ
VCC 3.0 V more than 1 kΩ
An input protection circuit ensures that 0 to 5.5 V can be
applied to the input pins without regard to the supply voltage.
This device can be used to interface 5 V to 3 V systems and two
supply systems such as battery back up. This circuit prevents
device destruction due to mismatched supply and input voltages.
Features
High speed: tpd = 8.1 ns (typ.) at VCC = 5 V
Low power dissipation
Standby state: 4 μA (max) at Ta = 25°C
Active state: 600 μA (max) at Ta = 25°C
High noise immunity: VNIH = VNIL = 28% VCC (min)
Power down protection is equipped with all inputs.
Balanced propagation delays: tpLH ∼− tpHL
Wide operating voltage range: VCC (opr) = 2 to 5.5 V
Pin and function compatible with 74HC123A/221A
TC74VHC123AFN, TC74VHC221AFN
TC74VHC123AFT, TC74VHC221AFT
TC74VHC123AFK, TC74VHC221AFK
Weight
SOP16-P-300-1.27A
SOL16-P-150-1.27
TSSOP16-P-0044-0.65A
VSSOP16-P-0030-0.50
: 0.18 g (typ.)
: 0.13 g (typ.)
: 0.06 g (typ.)
: 0.02 g (typ.)
1 2007-10-19


Toshiba Electronic Components Datasheet

TC74VHC221AFT Datasheet

DUAL MONOSTABLE MULTIVIBRATOR

No Preview Available !

Pin Assignment
1A 1
1B 2
1CLR 3
1Q 4
2Q 5
2CX 6
2RX/CX 7
GND 8
(top view)
IEC Logic Symbol
16 VCC
15 1RX/CX
14 1CX
13 1Q
12 2Q
11 2CLR
10 2B
9 2A
1A (1)
1B (2)
1CLR
1CX
1RX/CX
2A
2B
(3)
(14)
(15)
(9)
(10)
2CLR
2CX
2RX/CX
(11)
(6)
(7)
TC74VHC123A
&
R
CX
RX/CX
&
R
CX
RX/CX
(13) 1Q
(4) 1Q
(5) 2Q
(12) 2Q
Truth Table
Inputs
A B CLR
HH
XLH
HXH
LH
LH
XXL
X: Don’t care
Outputs
QQ
LH
LH
LH
Function
Output Enable
Inhibit
Inhibit
Output Enable
Output Enable
Reset
TC74VHC123,221AF/AFN/AFT/AFK
1A (1)
1B (2)
1CLR
1CX
1RX/CX
2A
2B
(3)
(14)
(15)
(9)
(10)
2CLR
2CX
2RX/CX
(11)
(6)
(7)
TC74VHC221A
&1
R
CX
RX/CX
&
1
R
CX
RX/CX
(13) 1Q
(4) 1Q
(5) 2Q
(12) 2Q
2 2007-10-19


Part Number TC74VHC221AFT
Description DUAL MONOSTABLE MULTIVIBRATOR
Maker Toshiba
Total Page 15 Pages
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