Fairchild Semiconductor 74AC125SJX, 74AC125SJ, 74AC125SCX, 74AC125SC, 74AC125PC Datasheet

March 1990

Revised November 1999

74AC125 • 74ACT125

Quad Buffer with 3-STATE Outputs

General Description	Features
The AC/ACT125 contains four independent non-inverting	■ ICC reduced by 50%

buffers with 3-STATE outputs.	■ Outputs source/sink 24 mA
	■ ACT125 has TTL-compatible outputs

Ordering Code:

Order Number	Package Number	Package Description
74AC125SC	M14A	14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150” Narrow Body
74AC125SJ	M14D	14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74AC125MTC	MTC14	14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74AC125PC	N14A	14-Lead Plastic Dual-in-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
74ACT125SC	M14A	14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150” Narrow Body
74ACT125SJ	M14D	14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74ACT125MTC	MTC14	14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74ACT125PC	N14A	14-Lead Plastic Dual-in-Line Package (PDIP), JEDEC MS-001, 0.300” Wide

Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.

Logic Symbol	Connection Diagram
	IEEE/IEC

Pin Descriptions					Function Table
						Inputs		Output
			Pin Names	Description
						An	Bn	On
	An, Bn			Inputs
						L	L	L
	On			Outputs
						L	H	H
						H	X	Z
					H = HIGH Voltage Level
					L = LOW Voltage Level
					Z = HIGH Impedance
					X = Immaterial

FACT is a trademark of Fairchild Semiconductor Corporation.

Outputs STATE-3 with Buffer Quad 74ACT125 • 74AC125

© 1999 Fairchild Semiconductor Corporation

DS010692

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74AC125 • 74ACT125

Absolute Maximum Ratings(Note 1)

Supply Voltage (VCC)		− 0.5V to + 7.0V
DC Input Diode Current (IK)
VI =	− 0.5V	− 20 mA
VI =	VCC + 0.5V	+ 20 mA
DC Input Voltage (VI)		− 0.5V to VCC + 0.5V
DC Output Diode Current (IOK)
VO =	− 0.5V	− 20 mA
VO =	VCC + 0.5V	+ 20 mA
DC Output Voltage (VO)		− 0.5V to VCC + 0.5V
DC Output Source
or Sink Current (IO)		± 50 mA
DC VCC or Ground Current
per Output Pin (ICC or IGND)		± 50 mA
Storage Temperature (TSTG)		− 65° C to + 150° C
Junction Temperature (TJ)
PDIP		140° C

Recommended Operating

Conditions

Supply Voltage (VCC)
AC	2.0V to 6.0V
ACT	4.5V to 5.5V
Input Voltage (VI)	0V to VCC
Output Voltage (VO)	0V to VCC
Operating Temperature (TA)	− 40° C to + 85° C
Minimum Input Edge Rate (∆ V/∆ t)
AC Devices
VIN from 30% to 70% of VCC
VCC @ 3.3V, 4.5V, 5.5V	125 mV/ns
Minimum Input Edge Rate (∆ V/∆ t)
ACT Devices
VIN from 0.8V to 2.0V
VCC @ 4.5V, 5.5V	125 mV/ns

Note 1: Absolute maximum ratings are those values beyond which damage to the device may occur. The databook specifications should be met, without exception, to ensure that the system design is reliable over its power supply, temperature, and output/input loading variables. Fairchild does not recommend operation of FACT circuits outside databook specifications.

DC Electrical Characteristics for AC

Symbol	Parameter	VCC	TA = + 25° C			TA = − 40° C to + 85° C		Units		Conditions
		(V)	Typ		Guaranteed Limits
VIH	Minimum HIGH Level	3.0	1.5		2.1		2.1		VOUT =		0.1V
	Input Voltage	4.5	2.25		3.15	3.15		V	or VCC −			0.1V
		5.5	2.75		3.85	3.85
VIL	Maximum LOW Level	3.0	1.5		0.9		0.9		VOUT =		0.1V
	Input Voltage	4.5	2.25		1.35	1.35		V	or VCC −			0.1V
		5.5	2.75		1.65	1.65
VOH	Minimum HIGH Level	3.0	2.99		2.9		2.9
	Output Voltage	4.5	4.49		4.4		4.4	V	IOUT =		−	50 µ A
		5.5	5.49		5.4		5.4
									VIN =	VIL or VIH
		3.0			2.56	2.46			IOH =	−	12 mA
		4.5			3.86	3.76		V	IOH =	−	24 mA
		5.5			4.86	4.76			IOH =	− 24 mA (Note 2)
VOL	Maximum LOW Level	3.0	0.002		0.1		0.1
	Output Voltage	4.5	0.001		0.1		0.1	V	IOUT =		50 µ A
		5.5	0.001		0.1		0.1
									VIN =	VIL or VIH
		3.0			0.36	0.44			IOL =	12 mA
		4.5			0.36	0.44		V	IOL = 24 mA
		5.5			0.36	0.44			IOL =	24 mA (Note 2)
IIN (Note 4)	Maximum Input Leakage Current	5.5			± 0.1	±	1.0	µ A	VI =	VCC, GND
IOZ	Maximum 3-STATE Current								VI (OE) = VIL, VIH
		5.5		±	0.25	±	2.5	µ A	VI =	VCC, VGND
									VO =	VCC, GND
IOLD	Minimum Dynamic	5.5					75	mA	VOLD =		1.65V Max
IOHD	Output Current (Note 3)	5.5					− 75	mA	VOHD =			3.85V Min
ICC (Note 4)	Maximum Quiescent Supply Current	5.5			4.0	40.0		µ A	VIN =	VCC or GND

Note 2: All outputs loaded; thresholds on input associated with output under test.

Note 3: Maximum test duration 2.0 ms, one output loaded at a time.

Note 4: Note: IIN and ICC@ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V VCC.

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2

DC Electrical Characteristics for ACT

Symbol	Parameter	VCC	TA = + 25° C		TA = − 40° C to + 85° C	Units				Conditions
		(V)	Typ	Guaranteed Limits
VIH	Minimum HIGH Level	4.5	1.5	2.0	2.0	V	VOUT =		0.1V
	Input Voltage	5.5	1.5	2.0	2.0		or VCC −			0.1V
VIL	Maximum LOW Level	4.5	1.5	0.8	0.8	V	VOUT =		0.1V
	Input Voltage	5.5	1.5	0.8	0.8		or VCC −			0.1V
VOH	Minimum HIGH Level	4.5	4.49	4.4	4.4	V	IOUT =		−	50 µ A
	Output Voltage	5.5	5.49	5.4	5.4
							VIN =	VIL or VIH
		4.5		3.86	3.76	V	IOH =	−	24 mA
		5.5		4.86	4.76		IOH =	− 24 mA (Note 5)
VOL	Maximum LOW Level	4.5	0.001	0.1	0.1	V	IOUT =		50 µ A
	Output Voltage	5.5	0.001	0.1	0.1
							VIN =	VIL or VIH
		4.5		0.36	0.44	V	IOL =	24 mA
		5.5		0.36	0.44		IOL =	24 mA (Note 5)
IIN	Maximum Input	5.5		± 0.1	± 1.0	µ A	VI =	VCC, GND
	Leakage Current
IOZ	Maximum 3-STATE	5.5		± 0.5	± 5.0	µ A	VI =	VIL, VIH
	Current						VO =	VCC, GND
ICCT	Maximum ICC/Input	5.5	0.6		1.5	mA	VI =	VCC − 2.1V (Note 7)
IOLD	Minimum Dynamic	5.5			75	mA	VOLD =		1.65V Max
IOHD	Output Current (Note 6)	5.5			− 75	mA	VOHD =			3.85V Min
ICC	Maximum Quiescent	5.5		4.0	40.0	µ A	VIN =	VCC
	Supply Current						or GND

Note 5: All outputs loaded; thresholds on input associated with output under test.

Note 6: Maximum test duration 2.0 ms, one output loaded at a time.

Note 7: May be measured per the JEDEC Alternate Method.

74ACT125 • 74AC125

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