TC74HC4538AP_07 Datasheet, PDF (1/15 Pages) Toshiba Semiconductor – Dual Retriggerable Monostable Multivibrator

TC74HC4538AP/AF/AFN/AFT
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74HC4538AP,TC74HC4538AF,TC74HC4538AFN,TC74HC4538AFT
Dual Retriggerable Monostable Multivibrator
The TC74HC4538A 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 (positive edge input), and
B input (negative edge input). These inputs are valid for a slow
rise/fall time signal (t_r = t_f = 1 s) as they are schmitt trigger
inputs.
After triggering, the output stays in a MONOSTABLE state for
the time period determined by the external resistor and capacitor
(R_X, C_X). A low level at CD input breaks this STABLE STATE.
In the MONOSTABLE state, if a new trigger is applied, it makes
the MONOSTABLE period longer (retrigger mode).
Limitations for C_X and R_X are as follows:
External capacitor C_X ........... No limitation
External resistor R_X .............. 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.
Features (Note)
• High speed: t_pd = 25 ns (typ.) at V_CC = 5 V
• Low power dissipation
Stand by state: I_CC = 4 μA (max) at Ta = 25°C
Active state: I_CC = 300 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 V to 6 V
• Pin and function compatible with 4538B
Note:
In the case of using only one circuit, CD should be
tied to GND, T1·T2·Q· Q should be tied to OPEN, the
other inputs should be tied to V_CC or GND.
Note: The JEDEC SOP (FN) is not available in
Japan.
TC74HC4538AP
TC74HC4538AF
TC74HC4538AFN
TC74HC4538AFT
Weight
DIP16-P-300-2.54A
SOP16-P-300.1.27A
SOL16-P-150-1.27
TSSOP16-P-0044-0.65A
: 1.00 g (typ.)
: 0.18 (typ.)
: 0.13 g (typ.)
: 0.06 g (typ.
1
2007-10-01