Manufacturer 
Part no 
Description 
View 
Fairchild Semiconductor 
DM74LS161A

Synchronous 4Bit Binary Counters
General Description
These synchronous, presettable counters feature an internal carry lookahead for application in highspeed counting designs. The DM74LS161A and DM74LS163A are 4bit binary counters. The carry output is decoded by means of a NOR gate, thus preventing spikes during the normal counting mode of operation. Synchronous operation is provided by having all flipflops clocked simultaneously so that the outputs change coincident with each other when so instructed by the countenable inputs and internal gating. This mode of operation eliminates the output counting
spikes which are normally associated with asynchronous (ripple clock) counters. A buffered clock input triggers the four flipflops on the rising (positivegoing) edge of the clock input waveform.
Features
■Synchronously programmable
■Internal lookahead for fast counting
■Carry output for nbit cascading
■Synchronous counting
■Load control line
■Diodeclamped inputs
■Typical propagation time, clock to Q output 14 ns
■Typical clock frequency 32 MHz
■Typical power dissipation 93 mW
other parts :
DM74LS161ACW
DM74LS161AM
DM74LS161AMX
DM74LS161AN
DM74LS163A
DM74LS163ACW
DM74LS163AM
DM74LS163AMX
DM74LS163AN


National >Texas Instruments 
DM74LS161A

Synchronous 4Bit Binary Counters
These synchronous, presettable counters feature an internal carry lookahead for application in highspeed counting designs. The LS161A and LS163A are 4bit binary counters.
The carry output is decoded by means of a NOR gate, thus preventing spikes during the normal counting mode of operation.
Acquired by Texas Instruments on September 23rd, 2011.
other parts :
54161
54LS161
54LS161A
54LS161ADMQB
54LS161AFMQB
54LS161ALMQB
54LS163
54LS163A
54LS163ADMQB
54LS163AFMQB


National >Texas Instruments 
DM74LS161AN

Synchronous 4Bit Binary Counters
These synchronous, presettable counters feature an internal carry lookahead for application in highspeed counting designs. The LS161A and LS163A are 4bit binary counters.
The carry output is decoded by means of a NOR gate, thus preventing spikes during the normal counting mode of operation.
Acquired by Texas Instruments on September 23rd, 2011.
other parts :
54161
54LS161
54LS161A
54LS161ADMQB
54LS161AFMQB
54LS161ALMQB
54LS163
54LS163A
54LS163ADMQB
54LS163AFMQB


Fairchild Semiconductor 
DM74LS161AM

Synchronous 4Bit Binary Counters
General Description
These synchronous, presettable counters feature an internal carry lookahead for application in highspeed counting designs. The DM74LS161A and DM74LS163A are 4bit binary counters. The carry output is decoded by means of a NOR gate, thus preventing spikes during the normal counting mode of operation. Synchronous operation is provided by having all flipflops clocked simultaneously so that the outputs change coincident with each other when so instructed by the countenable inputs and internal gating. This mode of operation eliminates the output counting
spikes which are normally associated with asynchronous (ripple clock) counters. A buffered clock input triggers the four flipflops on the rising (positivegoing) edge of the clock input waveform.
Features
■Synchronously programmable
■Internal lookahead for fast counting
■Carry output for nbit cascading
■Synchronous counting
■Load control line
■Diodeclamped inputs
■Typical propagation time, clock to Q output 14 ns
■Typical clock frequency 32 MHz
■Typical power dissipation 93 mW
other parts :
DM74LS161A
DM74LS161ACW
DM74LS161AMX
DM74LS161AN
DM74LS163A
DM74LS163ACW
DM74LS163AM
DM74LS163AMX
DM74LS163AN


National >Texas Instruments 
DM74LS161AE

Synchronous 4Bit Binary Counters
These synchronous, presettable counters feature an internal carry lookahead for application in highspeed counting designs. The LS161A and LS163A are 4bit binary counters.
The carry output is decoded by means of a NOR gate, thus preventing spikes during the normal counting mode of operation.
Acquired by Texas Instruments on September 23rd, 2011.
other parts :
54161
54LS161
54LS161A
54LS161ADMQB
54LS161AFMQB
54LS161ALMQB
54LS163
54LS163A
54LS163ADMQB
54LS163AFMQB


Fairchild Semiconductor 
DM74LS161AN

Synchronous 4Bit Binary Counters
General Description
These synchronous, presettable counters feature an internal carry lookahead for application in highspeed counting designs. The DM74LS161A and DM74LS163A are 4bit binary counters. The carry output is decoded by means of a NOR gate, thus preventing spikes during the normal counting mode of operation. Synchronous operation is provided by having all flipflops clocked simultaneously so that the outputs change coincident with each other when so instructed by the countenable inputs and internal gating. This mode of operation eliminates the output counting
spikes which are normally associated with asynchronous (ripple clock) counters. A buffered clock input triggers the four flipflops on the rising (positivegoing) edge of the clock input waveform.
Features
■Synchronously programmable
■Internal lookahead for fast counting
■Carry output for nbit cascading
■Synchronous counting
■Load control line
■Diodeclamped inputs
■Typical propagation time, clock to Q output 14 ns
■Typical clock frequency 32 MHz
■Typical power dissipation 93 mW
other parts :
DM74LS161A
DM74LS161ACW
DM74LS161AM
DM74LS161AMX
DM74LS163A
DM74LS163ACW
DM74LS163AM
DM74LS163AMX
DM74LS163AN


National >Texas Instruments 
DM74LS161AM

Synchronous 4Bit Binary Counters
These synchronous, presettable counters feature an internal carry lookahead for application in highspeed counting designs. The LS161A and LS163A are 4bit binary counters.
The carry output is decoded by means of a NOR gate, thus preventing spikes during the normal counting mode of operation.
Acquired by Texas Instruments on September 23rd, 2011.
other parts :
54161
54LS161
54LS161A
54LS161ADMQB
54LS161AFMQB
54LS161ALMQB
54LS163
54LS163A
54LS163ADMQB
54LS163AFMQB


National >Texas Instruments 
DM74LS161AW

Synchronous 4Bit Binary Counters


National >Texas Instruments 
DM74LS161AJ

Synchronous 4Bit Binary Counters


Fairchild Semiconductor 
DM74LS161ACW

Synchronous 4Bit Binary Counters
General Description
These synchronous, presettable counters feature an internal carry lookahead for application in highspeed counting designs. The DM74LS161A and DM74LS163A are 4bit binary counters. The carry output is decoded by means of a NOR gate, thus preventing spikes during the normal counting mode of operation. Synchronous operation is provided by having all flipflops clocked simultaneously so that the outputs change coincident with each other when so instructed by the countenable inputs and internal gating. This mode of operation eliminates the output counting
spikes which are normally associated with asynchronous (ripple clock) counters. A buffered clock input triggers the four flipflops on the rising (positivegoing) edge of the clock input waveform.
Features
■Synchronously programmable
■Internal lookahead for fast counting
■Carry output for nbit cascading
■Synchronous counting
■Load control line
■Diodeclamped inputs
■Typical propagation time, clock to Q output 14 ns
■Typical clock frequency 32 MHz
■Typical power dissipation 93 mW
other parts :
DM74LS161A
DM74LS161AM
DM74LS161AMX
DM74LS161AN
DM74LS163A
DM74LS163ACW
DM74LS163AM
DM74LS163AMX
DM74LS163AN


Fairchild Semiconductor 
DM74LS161AMX

Synchronous 4Bit Binary Counters
General Description
These synchronous, presettable counters feature an internal carry lookahead for application in highspeed counting designs. The DM74LS161A and DM74LS163A are 4bit binary counters. The carry output is decoded by means of a NOR gate, thus preventing spikes during the normal counting mode of operation. Synchronous operation is provided by having all flipflops clocked simultaneously so that the outputs change coincident with each other when so instructed by the countenable inputs and internal gating. This mode of operation eliminates the output counting
spikes which are normally associated with asynchronous (ripple clock) counters. A buffered clock input triggers the four flipflops on the rising (positivegoing) edge of the clock input waveform.
Features
■Synchronously programmable
■Internal lookahead for fast counting
■Carry output for nbit cascading
■Synchronous counting
■Load control line
■Diodeclamped inputs
■Typical propagation time, clock to Q output 14 ns
■Typical clock frequency 32 MHz
■Typical power dissipation 93 mW
other parts :
DM74LS161A
DM74LS161ACW
DM74LS161AM
DM74LS161AN
DM74LS163A
DM74LS163ACW
DM74LS163AM
DM74LS163AMX
DM74LS163AN

