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Toshiba Electronic Components Datasheet

TC74HC4520AP Datasheet

Dual 4-Bit Binary Counter

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TC74HC4520AP/AF
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74HC4520AP, TC74HC4520AF
Dual 4-Bit Binary Counter
The TC74HC4520A is high speed CMOS DUAL BCD/4-BIT
BINARY COUNTER fabricated with silicon gate C2MOS
technology.
It achieves the high speed operation similar to equivalent
LSTTL while maintaining the CMOS low power dissipation.
Since it contains two independent counter circuits in one
package, counting or frequency division of eight binary bits can
be achieved with one device. The counter is reset to “O” (Q0 to Q3
low) by setting the CLR input high regardless of the other inputs.
Counting occurs on the positive going (rising edge) transition of
CK if CE is high or the negative going (falling edge) transition of
CK if CE is low.
All inputs are equipped with protection circuits against static
discharge or transient excess voltage.
Features
High speed: fmax = 55 MHz (typ.) at VCC = 5 V
Low power dissipation: ICC = 4 μA (max) at Ta = 25°C
High noise immunity: VNIH = VNIL = 28% VCC (min)
Outputs drive capability: 10 LSTTL loads
Symmetrical output impedance: |IOH| = IOL = 4 mA (min)
Balanced propagation delays: tpLH ∼− tpHL
Wide operating voltage range: VCC (opr) = 2 to 6 V
Pin and function compatible with TC4520B
Pin Assignment
TC74HC4520AP
TC74HC4520AF
Weight
DlP16-P-300-2.54A
SOP16-P-300-1.27A
: 1.00 g (typ.)
: 0.18 g (typ.)
Start of commercial production
1988-05
1
2014-03-01


Toshiba Electronic Components Datasheet

TC74HC4520AP Datasheet

Dual 4-Bit Binary Counter

No Preview Available !

IEC Logic symbol
Truth Table
Inputs
CK CE CLR
H
L
L
L
X
L
X
L
L
L
H
L
X
X
H
Function
Inclement counter
Inclement counter
No change
No change
No change
No change
Q0 THRU Q3 = L
X: Don’t care
Timing Chart
TC74HC4520AP/AF
2
2014-03-01


Part Number TC74HC4520AP
Description Dual 4-Bit Binary Counter
Maker Toshiba
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TC74HC4520AP Datasheet PDF






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