© Semiconductor Components Industries, LLC, 2006
November, 2006 − Rev. 7
1 Publication Order Number:
MC74AC4040/D
MC74AC4040
12−Stage Binary Ripple
Counter
The MC74AC4040 consists of 12 master-slave flip-flops. The
output of each flip-flop feeds the next and the frequency at each output
is half that of the preceding one. The state of the counter advances on
the negative-going edge of the Clock input. Reset is asynchronous and
active-high.
State changes of the Q outputs do not occur simultaneously because
of internal ripple delays. Therefore, decoded output signals are subject
to decoding spikes and may have to be gated with the Clock of the
MC74AC4040 for some designs.
Features
• 140 MHz Typ. Clock
• Outputs Source/Sink 24 mA
• Operating Voltage Range: 2.0 to 6.0 V
• High Noise Immunity
• Pb−Free Packages are Available
1516 14 13 12 11 10
21 34567
V
CC
9
8
Q11 Q10 Q8 Q9 RESET CLK Q1
Q12 Q6 Q5 Q7 Q4 Q3 Q2 GND
Figure 1. Pinout: 16−Lead Packages Conductors
(Top View)
FUNCTION TABLE
Clock Reset Output State
L No Change
L Advance to next state
X H All Outputs are low
PDIP−16
N SUFFIX
CASE 648
1
16
SOIC−16
D SUFFIX
CASE 751B
1
16
See general marking information in the device marking
section on page 4 of this data sheet.
DEVICE MARKING INFORMATION
1
16
SOEIAJ−16
M SUFFIX
CASE 966
Device Package Shipping
†
ORDERING INFORMATION
MC74AC4040N
PDIP−16
25 Units/Rail
MC74AC4040D
SOIC−16
(Pb−Free)
48 Units/Rail
MC74AC4040DR2
2500 Tape & Ree
SOIC−16
MC74AC4040M
SOEIAJ−16
50 Units/Rail
http://onsemi.com
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
MC74AC4040DG
SOIC−16 48 Units/Rail
MC74AC4040NG
PDIP−16
(Pb−Free)
25 Units/Rail
MC74AC4040DR2G
SOIC−16
(Pb−Free)
2500 Tape & Ree