TC74HC221AP_07 Datasheet, PDF (1/13 Pages) Toshiba Semiconductor – Dual Monostable Multivibrator

TC74HC221AP/AF/AFN
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74HC221AP,TC74HC221AF,TC74HC221AFN
Dual Monostable Multivibrator
The TC74HC221A is a high speed CMOS MONOSTABLE
MULTIVIBRATOR fabricated with silicon gate C²MOS
technology.
It achieves the high speed operation similar to equivalent
LSTTL while maintaining the CMOS low power dissipation.
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: V_CC = 2.0 V more than 5 kΩ
V_CC ≥ 3.0 V more than 1 kΩ
All inputs are equipped with protection circuits against static
discharge or transient excess voltage.
Note: xxxFN (JEDEC SOP) is not available in
Japan.
TC74HC221AP
TC74HC221AF
Features (Note)
TC74HC221AFN
• High speed: t_pd = 25 ns (typ.) at V_CC = 5 V
• Low power dissipation
Standy by State: I_CC = 4 μA (max) at Ta = 25°C
Active State: I_CC = 700 μA (max) at Ta = 25°C
• High noise immunity: V_NIH = V_NIL = 28% V_CC (min)
• Output drive capability: 10 LSTTL loads
• Symmetrical output impedance: |I_OH| = I_OL = 4 mA (min)
• Balanced propagation delays: t_pLH ^∼− t_pHL
• Wide operating voltage range: V_CC (opr) = 2 to 6 V
• Pin and function compatible with 74LS221
Weight
DIP16-P-300-2.54A
SOP16-P-300-1.27A
SOL16-P-150-1.27
: 1.00 g (typ.)
: 0.18 g (typ.)
: 0.13 g (typ.)
Note: In the case of using only one circuit, CLR should be
tied to GND, Rx/Cxï½¥Cxï½¥Qï½¥ Q should be tied to OPEN, the other inputs should be tied to V_CC or GND.
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2007-10-01