TC74VHC123AF_12 Datasheet, PDF (1/14 Pages) Toshiba Semiconductor – Dual Monostable Multivibrator

TC74VHC123,221AF/AFT/AFK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74VHC123AF,TC74VHC123AFT,TC74VHC123AFK
TC74VHC221AF,TC74VHC221AFT,TC74VHC221AFK
Dual Monostable Multivibrator
TC74VHC123AF/AFT/AFK
TC74VHC221AF/AFT/AFK
Retriggerble
Non-Retriggerble
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 (t_r = t_f = 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
(R_X, C_X). A low level at the CLR input breaks this state.
Limits for C_X and R_X are:
External capacitor, C_X: No limit
External resistor, R_X: V_CC = 2.0 V more than 5 kΩ
V_CC ≥ 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: t_pd = 8.1 ns (typ.) at V_CC = 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: V_NIH = V_NIL = 28% V_CC (min)
• Power down protection is equipped with all inputs.
• Balanced propagation delays: t_pLH ^∼− t_pHL
• Wide operating voltage range: V_CC (opr) = 2 to 5.5 V
• Pin and function compatible with 74HC123A/221A
TC74VHC123AFT, TC74VHC221AFT
TC74VHC123AFK, TC74VHC221AFK
Weight
SOP16-P-300-1.27A
TSSOP16-P-0044-0.65A
VSSOP16-P-0030-0.50
: 0.18 g (typ.)
: 0.06 g (typ.)
: 0.02 g (typ.)
1
2012-02-29