74HC6323A; 74HCT6323A
Rev. 4 — 9 July 2018
Programmable ripple counter with oscillator; 3-state
Product data sheet
1
General description
The 74HC6323A; 74HCT6323A is an oscillator designed for quartz crystal combined with
a programmable 3-state counter, a 3-state output buffer and an overriding asynchronous
master reset (MR). With the two select inputs S1 and S2 the counter can be switched
in the divide-by-1, 2, 4 or 8 mode. If left floating the clock is divided by 8. The oscillator
is designed to operate either in the fundamental or third overtone mode depending on
the crystal and external components applied. On-chip capacitors minimize external
component count for third overtone crystal applications. The oscillator may be replaced
by an external clock signal at input X1. In this event the other oscillator pin (X2) must
be floating. The counter advances on the negative-going transition of X1. A LOW level
on MR resets the counter, stops the oscillator and sets the output buffer in the 3-state
condition. MR can be left floating since an internal pull-up resistor will make the MR
inactive.
The X1 input has CMOS input switching levels and may be driven by a TTL output using
a pull-up resistor connected to V
CC
. Inputs include clamp diodes. This enables the use of
current limiting resistors to interface inputs to voltages in excess of V
CC
.
2
Features and benefits
•
•
•
•
•
•
•
Programmable 3-stage ripple counter
Suitable for over-tone crystal application up to 50 MHz (V
CC
= 5 V ± 10%)
3-state output buffer
Two internal capacitors
Recommended operating range for use with third overtone crystals 3 to 6 V
Oscillator stop function (MR)
Input levels:
–
For 74HC6323: CMOS level
–
For 74HCT6323: TTL level
•
ESD protection:
–
HBM JESD22-A114-A exceeds 2000 V
–
MM JESD22-A115-A exceeds 200 V
•
Specified from -40 °C to +85 °C and from -40 °C to +125 °C
Nexperia
74HC6323A; 74HCT6323A
Programmable ripple counter with oscillator; 3-state
3
Applications
•
•
•
•
•
•
Control counters
Timers
Frequency dividers
Time-delay circuits
CIO (Compact Integrated Oscillator)
Third-overtone crystal operation
4
Ordering information
Package
Temperature range
Name
SO8
Description
plastic small outline package; 8 leads;
body width 3.9 mm
Version
SOT96-1
-40 °C to +125 °C
Table 1. Ordering information
Type number
74HC6323AD
74HCT6323AD
5
Functional diagram
6
X1
CP
MR
3
2
C
D
S1
S2
OUT
1
X2
7
5
aaa-028595
Figure 1. IEC logic symbol
6
X2
7
5
X1
CP
CD
3 - STAGE BINARY COUNTER
AND DECODER
S1
3
S2
2
OUT
1
aaa-028596
MR
Figure 2. Functional diagram
74HC_HCT6323A
All information provided in this document is subject to legal disclaimers.
© Nexperia B.V. 2018. All rights reserved.
Product data sheet
Rev. 4 — 9 July 2018
2 / 22
Nexperia
74HC6323A; 74HCT6323A
Programmable ripple counter with oscillator; 3-state
X2
X1
7 pF
(1)
7 pF
(1)
CP Q
FF
R
CP Q
FF
R
CP Q
FF
R
V
CC
V
CC
DECODER
V
CC
V
CC
MR
S1
S2
V
CC
OUT
aaa-028597
(1) Internal capacitors typical 7 pF each.
Including stray capacitors on pin X1 and X2, total capacitance will be typical 12 pF per pin.
Figure 3. Logic diagram
6
Pinning information
6.1 Pinning
74HC6323A
74HCT6323A
OUT
S2
S1
GND
1
2
3
4
aaa-028594
8
7
6
5
VCC
X1
X2
MR
Figure 4. Pin configuration SOT96-1 (SO8)
6.2 Pin description
Table 2. Pin description
Symbol
OUT
S1, S2
GND
MR
X2
X1
V
CC
Pin
1
3, 2
4
5
6
7
8
Description
counter output
mode select inputs for divide by 1, 2, 4 or 8
ground (0 V)
master reset input (active LOW)
oscillator pin
clock input /oscillator pin
supply voltage
74HC_HCT6323A
All information provided in this document is subject to legal disclaimers.
© Nexperia B.V. 2018. All rights reserved.
Product data sheet
Rev. 4 — 9 July 2018
3 / 22
Nexperia
74HC6323A; 74HCT6323A
Programmable ripple counter with oscillator; 3-state
7
Functional description
Outputs
S2
0
1
0
1
OUT
f
i
f
i
/2
f
i
/4
f
i
/8
Table 3.
Inputs
S1
0
0
1
1
8
Limiting values
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
V
CC
I
IK
I
OK
I
O
I
CC
I
GND
T
stg
P
tot
supply voltage
input clamping current
output clamping current
output current
supply current
ground current
storage temperature
total power dissipation
T
amb
= -40 °C to +125 °C
[1]
Conditions
V
I
< -0.5 V or V
I
> V
CC
+ 0.5 V
V
O
< -0.5 V or V
O
> V
CC
+ 0.5 V
OUT output; -0.5 V < V
O
< V
CC
+ 0.5 V
OUT output
OUT output
Min
-0.5
-
-
-
-
-70
-65
-
Max
+7
±20
±20
±35
70
-
+150
500
Unit
V
mA
mA
mA
mA
mA
°C
mW
[1] P
tot
derates linearly with 8 mW/K above 70 °C.
9
Recommended operating conditions
Table 5. Recommended operating conditions
Voltages are referenced to GND (ground = 0 V)
Symbol Parameter
V
CC
V
I
V
O
T
amb
Δt/ΔV
supply voltage
input voltage
output voltage
ambient temperature
input transition rise and fall rate V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
Conditions
Min
2.0
0
0
-40
-
-
-
74HC6323A
Typ
5.0
-
-
-
-
1.67
-
Max
6.0
V
CC
V
CC
+125
625
139
83
Min
4.5
0
0
-40
-
-
-
74HCT6323A
Typ
5.0
-
-
-
-
1.67
-
Max
5.5
V
CC
V
CC
+125
-
139
-
V
V
V
°C
ns/V
ns/V
ns/V
Unit
74HC_HCT6323A
All information provided in this document is subject to legal disclaimers.
© Nexperia B.V. 2018. All rights reserved.
Product data sheet
Rev. 4 — 9 July 2018
4 / 22
Nexperia
74HC6323A; 74HCT6323A
Programmable ripple counter with oscillator; 3-state
10 Static characteristics
Table 6. Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
74HC6323A
V
IH
HIGH-level input
voltage
MR, X1, S1, S2 input
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
V
IL
LOW-level input
voltage
MR, X1, S1, S2 input
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
V
OH
HIGH-level output
voltage
X2 output
V
CC
= 4.5 V; X1 = GND; MR = V
CC
; I
O
= -2.6 mA
V
CC
= 6.0 V; X1 = GND; MR = V
CC
; I
O
= -3.3 mA
V
CC
= 4.5 V; X1 = V
CC
; MR = GND; I
O
= -2.6 mA
V
CC
= 6.0 V; X1 = V
CC
; MR = GND; I
O
= -3.3 mA
V
CC
= 2.0 V; X1 = GND; MR = V
CC
; I
O
= -20 µA
V
CC
= 4.5 V; X1 = GND; MR = V
CC
; I
O
= -20 µA
V
CC
= 6.0 V; X1 = GND; MR = V
CC
; I
O
= -20 µA
V
CC
= 2.0 V; X1 = V
CC
; MR = GND; I
O
= -20 µA
V
CC
= 4.5 V; X1 = V
CC
; MR = GND; I
O
= -20 µA
V
CC
= 6.0 V; X1 = V
CC
; MR = GND; I
O
= -20 µA
3.98
5.48
3.98
5.48
1.9
4.4
5.9
1.9
4.4
5.9
-
-
-
-
2.0
4.5
6.0
2.0
4.5
6.0
-
-
-
-
-
-
-
-
-
-
3.84
5.34
3.84
5.34
1.9
4.4
5.9
1.9
4.4
5.9
-
-
-
-
-
-
-
-
-
-
3.7
5.2
3.7
5.2
1.9
4.4
5.9
1.9
4.4
5.9
-
-
-
-
-
-
-
-
-
-
V
V
V
V
V
V
V
V
V
V
-
-
-
0.8
2.1
2.8
0.5
1.35
1.8
-
-
-
0.5
1.35
1.8
-
-
-
0.5
1.35
1.8
V
V
V
1.5
3.15
4.2
1.2
2.4
3.2
-
-
-
1.5
3.15
4.2
-
-
-
1.5
3.15
4.2
-
-
-
V
V
V
Conditions
Min
25 °C
Typ
Max
-40 °C to +85 °C
Min
Max
-40 °C to +125 °C
Min
Max
Unit
74HC_HCT6323A
All information provided in this document is subject to legal disclaimers.
© Nexperia B.V. 2018. All rights reserved.
Product data sheet
Rev. 4 — 9 July 2018
5 / 22
