74AC161

Features:

*ICC reduced by 50%
*Synchronous counting and loading
*High-speed synchronous expansion
*Typical count rate of 125 MHz
*Outputs source/sink 24 mA
*ACT161 has TTL-compatible inputs




Pinout






Specifications

Supply Voltage (V_CC) −0.5V to +7.0V
DC Input Diode Current (I_IK)
V_I = −0.5V −20 mA
V_I = V_CC + 0.5V +20 mA
DC Input Voltage (V_I) −0.5V to VCC + 0.5V
DC Output Diode Current (I_OK)
V_O = −0.5V −20 mA
V_O = V_CC + 0.5V +20 mA
DC Output Voltage (V_O) −0.5V to VCC + 0.5V
DC Output Source
or Sink Current (I_O) ±50 mA
DC V_CC or Ground Current
per Output Pin (ICC or IGND)±50 mA
Storage Temperature (T_STG) −65°C to +150°C
Junction Temperature (T_J)
PDIP 140°C

Product	Product status	Eco Status	Pricing*	Package type	Leads	Packing method	Package Drawing	Package Marking Convention**
74AC161MTC	Full Production	RoHS Compliant	$0.23	TSSOP	16	RAIL		Line 1: $Y (Fairchild logo) &Z (Asm. Plant Code) &2 (2-Digit Date Code) &K Line 2: AC161
74AC161MTCX	Full Production	RoHS Compliant	$0.23	TSSOP	16	TAPE REEL		Line 1: $Y (Fairchild logo) &Z (Asm. Plant Code) &2 (2-Digit Date Code) &K Line 2: AC161
74AC161PC	Full Production	RoHS Compliant	$0.444	DIP	16	RAIL		Line 1: $Y (Fairchild logo) &Z (Asm. Plant Code) &4 (4-Digit Date Code) &K Line 2: 74AC161PC
74AC161SC	Full Production	RoHS Compliant	$0.23	SOIC	16	RAIL		Line 1: $Y (Fairchild logo) &Z (Asm. Plant Code) &2 (2-Digit Date Code) &K Line 2: 74AC161
74AC161SCX	Full Production	RoHS Compliant	$0.23	SOIC	16	TAPE REEL		Line 1: $Y (Fairchild logo) &Z (Asm. Plant Code) &2 (2-Digit Date Code) &K Line 2: 74AC161
74AC161SJ	Full Production	RoHS Compliant	$0.374	SOP	16	RAIL		Line 1: $Y (Fairchild logo) &Z (Asm. Plant Code) &2 (2-Digit Date Code) &K Line 2: 74AC161
74AC161SJX	Full Production	RoHS Compliant	$0.374	SOP	16	TAPE REEL		Line 1: $Y (Fairchild logo) &Z (Asm. Plant Code) &2 (2-Digit Date Code) &K Line 2: 74AC161

* Fairchild 1,000 piece Budgetary Pricing

** A sample button will appear if the part is available through Fairchild's on-line samples program. If there is no sample button, please contact a Fairchild distributor to obtain samples

Package marking information for product 74AC161 is available. Click here for more information .

Description

The 74AC161 are high-speed synchronous modulo-16 binary counters. They are synchronously presettable for application in programmable dividers and have two types of Count Enable inputs plus a Terminal Count output for versatility in forming synchronous multistage counters. The AC/ACT161 has an asynchronous Master Reset input that overrides all other inputs and forces the outputs LOW.

The 74AC161 are high-speed synchronous modulo-16 binary counters. They are synchronously presettable for application in programmable dividers and have two types of Count Enable inputs plus a Terminal Count output for versatility in forming synchronous multistage counters. The AC/ACT161 has an asynchronous Master Reset input that overrides all other inputs and forces the outputs LOW.