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74HCT4520D Datasheet Preview

74HCT4520D Datasheet

Dual 4-bit synchronous binary counter

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74HC4520; 74HCT4520
Dual 4-bit synchronous binary counter
Rev. 6 — 9 October 2020
Product data sheet
1. General description
The 74HC4520; 74HCT4520 are dual 4-bit internally synchronous binary counters with two clock
inputs (nCP0 and nCP1). They have buffered outputs from all 4 bit positions (nQ0 to nQ3) and an
asynchronous master reset input (nMR). The counter advances on the LOW-to-HIGH transition of
nCP0 when nCP1 is HIGH. It also advances on the HIGH-to-LOW transition of nCP1 when nCP0
is LOW. Either nCP0 or nCP1 may be used as the clock input to the counter. The other clock input
may be used as a clock enable input. A HIGH on nMR, resets the counter (nQ0 to nQ3 = LOW)
independent of nCP0 and nCP1. Inputs include clamp diodes. It enables the use of current limiting
resistors to interface inputs to voltages in excess of VCC.
2. Features and benefits
Wide supply voltage range from 2.0 V to 6.0 V
CMOS low power dissipation
High noise immunity
Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
Complies with JEDEC standards:
JESD8C (2.7 V to 3.6 V)
JESD7A (2.0 V to 6.0 V)
Input levels:
For 74HC4520: CMOS level
For 74HCT4520: TTL level
ESD protection:
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
Specified from -40 °C to +85 °C and -40 °C to +125 °C
3. Applications
Multistage synchronous counting
Multistage asynchronous counting
Frequency dividers
4. Ordering information
Table 1. Ordering information
Type number
Package
Temperature range
74HC4520D
-40 °C to +125 °C
74HCT4520D
74HC4520PW
-40 °C to +125 °C
Name
SO16
TSSOP16
Description
plastic small outline package; 16 leads;
body width 3.9 mm
plastic thin shrink small outline package;
16 leads; body width 4.4 mm
Version
SOT109-1
SOT403-1




nexperia

74HCT4520D Datasheet Preview

74HCT4520D Datasheet

Dual 4-bit synchronous binary counter

No Preview Available !

Nexperia
74HC4520; 74HCT4520
Dual 4-bit synchronous binary counter
5. Functional diagram
Fig. 1. Functional diagram
1 1CP0
2 1CP1
7 1MR
9 2CP0
10 2CP1
15 2MR
1Q0 3
1Q1 4
1Q2 5
1Q3 6
2Q0 11
2Q1 12
2Q2 13
2Q3 14
001aae698
nCP0
nCP1
nMR
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0 1 2 3 4
nQ0
nQ1
nQ2
nQ3
Fig. 2. Timing diagram
001aae707
nQ0
nQ1
nQ2
nQ3
nCP1
nCP0
nMR
Q
FF1
CP
RD Q
Fig. 3. Logic diagram for one counter
Q
FF2
CP
RD Q
Q
FF3
CP
RD Q
Q
FF4
CP
RD Q
aaa-015608
74HC_HCT4520
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 9 October 2020
© Nexperia B.V. 2020. All rights reserved
2 / 14


Part Number 74HCT4520D
Description Dual 4-bit synchronous binary counter
Maker nexperia
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74HCT4520D Datasheet PDF






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