mc74hc393 ON Semiconductor, mc74hc393 Datasheet - Page 4

• Manufacturer Part Number: mc74hc393
• Description: Dual 4-stage Binary Ripple Counter
• Manufacturer: ON Semiconductor

MOTOROLA
INPUTS
Clock (Pins 1, 13)
counter state advances on high–to–low transitions of the
clock input.
CONTROL INPUTS
Reset (Pins 2, 12)
MC54/74HC393
Clock input. The internal flip–flops are toggled and the
Active–high, asynchronous reset. A separate reset is pro-
CLOCK
Q
* Includes all probe and jig capacitance
10%
50%
90%
90%
90%
50%
DEVICE
UNDER
10%
Figure 3. Test Circuit
TEST
t f
t w
t PLH
t TLH
Figure 1.
1/f max
OUTPUT
t r
t PHL
t THL
POINT
TEST
C L *
V CC
GND
SWITCHING WAVEFORMS
PIN DESCRIPTIONS
CLOCK
RESET
4
vided for each counter. A high at the Reset input prevents
counting and forces all four outputs low.
OUTPUTS
Q1, Q2, Q3, Q4 (Pins 3, 4, 5, 6, 8, 9, 10, 11)
Parallel binary outputs Q4 is the most significant bit.
1, 13
2, 12
CLOCK
RESET
Q
EXPANDED LOGIC DIAGRAM
t PHL
Figure 2.
50%
D
D
D
D
t rec
C
C
C
C
50%
t w
High–Speed CMOS Logic Data
Q
Q
Q
Q
Q
Q
Q
Q
50%
DL129 — Rev 6
3, 11
4, 10
5, 9
6, 8
V CC
GND
V CC
GND
Q1
Q2
Q3
Q4