HD74HC4518/HD74HC4520
Dual BCD Use Converters/Dual Binary Up Converters
Description
The HD74HC4518 dual BCD counter and the HD74HC4520 dual binary counter consist of two identical,
independent, internally synchronous 4-stage counters. The counter stages are type D flip-flops, with
interchangeable Clock and Enable lines for incrementing on either the positive-going or negative-going
transition as required when cascading multiple stages. Each counter can be cleared by applying a high
level on the Reset line. In addition, the HD74HC4518 will count out of all undefined states within two
clock periods. These complementary MOS up counters find primary use in multi-stage synchronous or
ripple counting applications requiring low power dissipation and/or high noise immunity.
Features
• High Speed Operation
• High Output Current: Fanout of 10 LSTTL Loads
• Wide Operating Voltage: VCC = 2 to 6 V
• Low Input Current: 1 µA max
• Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
Function Table
Clock Enable Reset Operation
H L Increment counter
L L Increment counter
X L No change
X L No change
L L No change
H L No change
XXHQ
0
to Q3 = L
HD74HC4518/HD74HC4520
2
Pin Arrangement
1
2
3
4
5
6
7
8
Clock A
Enable A
Q0 A
Q1 A
Q2 A
Q3 A
Reset A
GND
VCC
Reset B
Q3 B
Q2 B
Q1 B
Q0 B
Enable B
Clock B
CR
RC
Q
3
Q
2
Q
1
Q
0
Q
0
Q
1
Q
2
Q
3
16
15
14
13
12
11
10
9
(Top view)
HD74HC4518/HD74HC4520
3
Timing Diagram
123456789
10 11 12 13 14 15 16 17 18
123456789
10 11 12 13 14 15
01234
12345678901234567890
Clock
Enable
Reset
Q0
Q3
Q2
Q1
Q0
Q3
Q2
Q1
HD74HC4518
HD74HC4520
HD74HC4518/HD74HC4520
4
Logic Diagram
HD74HC4518
D
CR
Q
Q
D
C
Q
Q
D
C
Q
Q
D
C
Q
Q
Reset
Clock
Enable
Q0Q1Q2Q3
RRR
HD74HC4520
Reset
D
CR
Q
Q
D
C
Q
Q
D
C
Q
Q
D
C
Q
Q
Clock
Enable
Q0Q1Q2Q3
RRR
HD74HC4518/HD74HC4520
5
DC Characteristics
Ta = 25°CTa = –40 to
+85°C
Item Symbol VCC (V) Min Typ Max Min Max Unit Test Conditions
Input voltage VIH 2.0 1.5 — — 1.5 — V
4.5 3.15 — — 3.15 —
6.0 4.2 — — 4.2 —
VIL 2.0 — — 0.5 — 0.5 V
4.5 — — 1.35 — 1.35
6.0 — — 1.8 — 1.8
Output voltage VOH 2.0 1.9 2.0 — 1.9 — V Vin = VIH or VIL IOH = –20 µA
4.5 4.4 4.5 — 4.4 —
6.0 5.9 6.0 — 5.9 —
4.5 4.18 — — 4.13 — IOH = –4 mA
6.0 5.68 — — 5.63 — IOH = –5.2 mA
VOL 2.0 — 0.0 0.1 — 0.1 V Vin = VIH or VIL IOL = 20 µA
4.5 — 0.0 0.1 — 0.1
6.0 — 0.0 0.1 — 0.1
4.5 — — 0.26 — 0.33 IOL = 4 mA
6.0 — — 0.26 — 0.33 IOL = 5.2 mA
Input current Iin 6.0 — — ±0.1 — ±1.0 µA Vin = VCC or GND
Quiescent supply
current ICC 6.0 — — 4.0 — 40 µA Vin = VCC or GND, Iout = 0 µA
HD74HC4518/HD74HC4520
6
AC Characteristics (CL = 50 pF, Input tr = tf = 6 ns)
Ta = 25°CTa = –40 to
+85°C
Item Symbol VCC (V) Min Typ Max Min Max Unit Test Conditions
Maximum clock fmax 2.0 — — 5 — 4 MHz
frequency 4.5 — — 27 — 21
6.0 — — 32 — 25
Propagation delay tPLH 2.0 — — 190 — 240 ns Clock to Q
time tPHL 4.5 — 22 38 — 48
6.0 — — 32 — 41
tPLH 2.0 — — 200 — 250 ns Reset to Q
tPHL 4.5 — 22 40 — 50
6.0 — — 34 — 43
tPLH 2.0 — — 190 — 240 ns Enable to Q
tPHL 4.5 — 17 38 — 48
6.0 — — 32 — 41
Pulse width tw2.0 80 — — 100 — ns
4.5 16 7 — 20 —
6.0 14 — — 17 —
Output rise/fall tTLH 2.0 — — 75 — 95 ns
time tTHL 4.5 — — 15 — 19
6.0 — — 13 — 16
Input capacitance Cin — — 5 10 — 10 pF
Removel time trem 2.0 0 — — 0 — ns Reset clock
4.5 0 –3 — 0 —
6.0 0 — — 0 —
Hitachi Code
JEDEC
EIAJ
Weight
(reference value)
DP-16
Conforms
Conforms
1.07 g
Unit: mm
6.30
19.20
16 9
81 1.3
20.00 Max
7.40 Max
7.62
0.25+ 0.13
– 0.05
2.54 ± 0.25 0.48 ± 0.10
0.51 Min
2.54 Min 5.06 Max
0° – 15°
1.11 Max
Hitachi Code
JEDEC
EIAJ
Weight
(reference value)
FP-16DA
—
Conforms
0.24 g
Unit: mm
*Dimension including the plating thickness
Base material dimension
*0.22 ± 0.05
*0.42 ± 0.08
0.12
0.15
M
2.20 Max 5.5
10.06
0.80 Max
16 9
18
10.5 Max
+ 0.20
– 0.30
7.80
0.70 ± 0.20
0° – 8°
0.10 ± 0.10
1.15
1.27
0.40 ± 0.06
0.20 ± 0.04
Hitachi Code
JEDEC
EIAJ
Weight
(reference value)
FP-16DN
Conforms
Conforms
0.15 g
Unit: mm
*Dimension including the plating thickness
Base material dimension
1.27
16 9
18
0.15
0.25 M
1.75 Max 3.95
*0.22 ± 0.03
9.9
0° – 8°
10.3 Max
+ 0.10
– 0.30
6.10
+ 0.67
– 0.20
0.60
+ 0.11
– 0.04
0.14
*0.42 ± 0.08
0.635 Max
0.40 ± 0.06
0.20 ± 0.03
1.08
Cautions
1. Hitachi neither warrants nor grants licenses of any rights of Hitachi’s or any third party’s patent,
copyright, trademark, or other intellectual property rights for information contained in this document.
Hitachi bears no responsibility for problems that may arise with third party’s rights, including
intellectual property rights, in connection with use of the information contained in this document.
2. Products and product specifications may be subject to change without notice. Confirm that you have
received the latest product standards or specifications before final design, purchase or use.
3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However,
contact Hitachi’s sales office before using the product in an application that demands especially high
quality and reliability or where its failure or malfunction may directly threaten human life or cause risk
of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,
traffic, safety equipment or medical equipment for life support.
4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly
for maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable
failure rates or failure modes in semiconductor devices and employ systemic measures such as fail-
safes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
consequential damage due to operation of the Hitachi product.
5. This product is not designed to be radiation resistant.
6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without
written approval from Hitachi.
7. Contact Hitachi’s sales office for any questions regarding this document or Hitachi semiconductor
products.
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