74AC169PC

74AC169PC Datasheet

74AC169 4-Stage Synchronous Bidirectional Counter

Part	Datasheet
74AC169PC	74AC169PC (pdf)

Related Parts	Information
74AC169SC	74AC169SC
74AC169SJX	74AC169SJX
74AC169SCX	74AC169SCX
74AC169MTC	74AC169MTC
74AC169MTCX	74AC169MTCX
74AC169SJ	74AC169SJ

PDF Datasheet Preview
74AC169 4-Stage Synchronous Bidirectional Counter 74AC169 4-Stage Synchronous Bidirectional Counter The AC169 is fully synchronous 4-stage up/down counter. The AC169 is a modulo-16 binary counter. It features a preset capability for programmable operation, carry lookahead for easy cascading and a U/D input to control the direction of counting. All state changes, whether in counting or parallel loading, are initiated by the LOW-to-HIGH transition of the Clock. s ICC reduced by 50% s Synchronous counting and loading s Built-In lookahead carry capability s Presettable for programmable operation s Outputs source/sink 24 mA Ordering Code: Order Number 74AC169SC 74AC169SJ 74AC169MTC 74AC169PC Package Number Package Description M16A 16-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-012, Narrow Body M16D 16-Lead Small Outline Package SOP , EIAJ TYPE II, 5.3mm Wide MTC16 16-Lead Thin Shrink Small Outline Package TSSOP , JEDEC MO-153, 4.4mm Wide N16E 16-Lead Plastic Dual-In-Line Package PDIP , JEDEC MS-001, Wide Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code. Logic Symbols Connection Diagram IEEE/IEC Pin Descriptions Pin Names CEP CET CP PE U/D TC Description Count Enable Parallel Input Count Enable Trickle Input Clock Pulse Input Parallel Data Inputs Parallel Enable Input Up-Down Count Control Input Flip-Flop Outputs Terminal Count Output is a trademark of Fairchild Semiconductor Corporation. 1999 Fairchild Semiconductor Corporation DS009934 74AC169 Functional Description The AC169 uses edge-triggered J-K-type flip-flops and have no constraints on changing the control or data input signals in either state of the Clock. The only requirement is that the various inputs attain the desired state at least a setup time before the rising edge of the clock and remain valid for the recommended hold time thereafter. The parallel load operation takes precedence over the other operations, as indicated in the Mode Select Table. When PE is LOW, the data on the inputs enters the flip-flops on the next rising edge of the Clock. In order for counting to occur, both CEP and CET must be LOW and PE must be HIGH the U/D input then determines the direction of counting. The Terminal Count TC output is normally HIGH and goes LOW, provided that CET is LOW, when a counter reaches zero in the Count Down mode or reaches 15 in the Count Up mode. The TC output state is not a function of the Count Enable Parallel CEP input level. If an illegal state occurs, the AC169 will return to the legitimate sequence within two counts. Since the TC signal is derived by decoding the flip-flop states, there exists the possibility of decoding spikes on TC. For this reason the use of TC as a clock signal is not recommended see logic equations below . Count Enable = CEP •CET • PE Up TC = Q0•Q1•Q 2Q3• Up •CET Down TC = Q0• Q1•Q2•Q3 • Down •CET Mode Select Table PE CEP CET H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Action on Rising U/D Clock Edge X Load Pn to Qn H Count Up Increment L Count Down Decrement X No Change Hold X No Change Hold State Diagram Logic Diagram Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. 74AC169 Absolute Maximum Ratings Note 1 Supply Voltage VCC DC Input Diode Current IIK VI = −0.5V VI = VCC + 0.5V DC Input Voltage VI DC Output Diode Current IOK VO = −0.5V VO = VCC + 0.5V DC Output Voltage VO DC Output Source or Sink Current IO DC VCC or Ground Current per Output Pin ICC or IGND Storage Temperature TSTG Junction Temperature TJ PDIP −0.5V to +7.0V −20 mA +20 mA −0.5V to VCC + 0.5V −20 mA +20 mA −0.5V to VCC + 0.5V ±50 mA ±50 mA −65°C to +150°C 140°C Recommended Operating Conditions

PDF Datasheet Preview

74AC169 4-Stage Synchronous Bidirectional Counter
74AC169 4-Stage Synchronous Bidirectional Counter

The AC169 is fully synchronous 4-stage up/down counter. The AC169 is a modulo-16 binary counter. It features a preset capability for programmable operation, carry lookahead for easy cascading and a U/D input to control the direction of counting. All state changes, whether in counting or parallel loading, are initiated by the LOW-to-HIGH transition of the Clock.
s ICC reduced by 50% s Synchronous counting and loading s Built-In lookahead carry capability s Presettable for programmable operation s Outputs source/sink 24 mA
Ordering Code:

Order Number 74AC169SC 74AC169SJ 74AC169MTC 74AC169PC

Package Number

Package Description

M16A
16-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-012, Narrow Body

M16D
16-Lead Small Outline Package SOP , EIAJ TYPE II, 5.3mm Wide

MTC16
16-Lead Thin Shrink Small Outline Package TSSOP , JEDEC MO-153, 4.4mm Wide

N16E
16-Lead Plastic Dual-In-Line Package PDIP , JEDEC MS-001, Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.

Logic Symbols

Connection Diagram

IEEE/IEC

Pin Descriptions

Pin Names CEP CET CP PE U/D TC

Description Count Enable Parallel Input Count Enable Trickle Input Clock Pulse Input Parallel Data Inputs Parallel Enable Input Up-Down Count Control Input Flip-Flop Outputs Terminal Count Output
is a trademark of Fairchild Semiconductor Corporation.
1999 Fairchild Semiconductor Corporation DS009934
74AC169

Functional Description

The AC169 uses edge-triggered J-K-type flip-flops and have no constraints on changing the control or data input signals in either state of the Clock. The only requirement is that the various inputs attain the desired state at least a setup time before the rising edge of the clock and remain valid for the recommended hold time thereafter. The parallel load operation takes precedence over the other operations, as indicated in the Mode Select Table. When PE is LOW, the data on the inputs enters the flip-flops on the next rising edge of the Clock. In order for counting to occur, both CEP and CET must be LOW and PE must be HIGH the U/D input then determines the direction of counting. The Terminal Count TC output is normally HIGH and goes LOW, provided that CET is LOW, when a counter reaches zero in the Count Down mode or reaches 15 in the Count Up mode. The TC output state is not a function of the Count Enable Parallel CEP input level. If an illegal state occurs, the AC169 will return to the legitimate sequence within two counts. Since the TC signal is derived by decoding the flip-flop states, there exists the possibility of decoding spikes on TC. For this reason the use of TC as a clock signal is not recommended see logic equations below .

Count Enable = CEP
•CET
• PE

Up TC = Q0•Q1•Q 2Q3• Up
•CET

Down TC = Q0• Q1•Q2•Q3
• Down
•CET

Mode Select Table

PE CEP CET

H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial

Action on Rising U/D

Clock Edge

X Load Pn to Qn H Count Up Increment

L Count Down Decrement

X No Change Hold

X No Change Hold

State Diagram

Logic Diagram

Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
74AC169

Absolute Maximum Ratings Note 1

Supply Voltage VCC DC Input Diode Current IIK

VI = −0.5V VI = VCC + 0.5V DC Input Voltage VI DC Output Diode Current IOK VO = −0.5V VO = VCC + 0.5V DC Output Voltage VO DC Output Source
or Sink Current IO DC VCC or Ground Current
per Output Pin ICC or IGND Storage Temperature TSTG Junction Temperature TJ

PDIP
−0.5V to +7.0V
−20 mA +20 mA −0.5V to VCC + 0.5V
−20 mA +20 mA −0.5V to VCC + 0.5V
±50 mA
±50 mA −65°C to +150°C
140°C

Recommended Operating Conditions

More datasheets: 553-0133 | MV5337 | MV5437RA | MV5439 | MV5437 | 18053ACU | BXRE-40E3001-D-03 | BXRE-30E3001-D-03 | FDP5690 | FDB5690

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived 74AC169PC Datasheet file may be downloaded here without warranties.

Datasheet ID: 74AC169PC 513083