Datasheet Texas Instruments SN74LS21 — 数据表

制造商	Texas Instruments
系列	SN74LS21

双4输入正与门

数据表

PDF, 942 Kb, 档案已发布: Mar 1, 1988

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	SN74LS21D	SN74LS21DR	SN74LS21DRG4	SN74LS21N	SN74LS21N3	SN74LS21NE4	SN74LS21NSR
Lifecycle Status	Active (Recommended for new designs)	Active (Recommended for new designs)	Active (Recommended for new designs)	Active (Recommended for new designs)	Obsolete (Manufacturer has discontinued the production of the device)	Active (Recommended for new designs)	Active (Recommended for new designs)
Manufacture's Sample Availability	Yes	No	No	No	No	No	No

	SN74LS21D	SN74LS21DR	SN74LS21DRG4	SN74LS21N	SN74LS21N3	SN74LS21NE4	SN74LS21NSR
N	1	2	3	4	5	6	7
Pin	14	14	14	14	14	14	14
Package Type	D	D	D	N	N	N	NS
Industry STD Term	SOIC	SOIC	SOIC	PDIP	PDIP	PDIP	SOP
JEDEC Code	R-PDSO-G	R-PDSO-G	R-PDSO-G	R-PDIP-T	R-PDIP-T	R-PDIP-T	R-PDSO-G
Package QTY	50	2500	2500	25		25	2000
Carrier	TUBE	LARGE T&R	LARGE T&R	TUBE		TUBE	LARGE T&R
Device Marking	LS21	LS21	LS21	SN74LS21N		SN74LS21N	74LS21
Width (mm)	3.91	3.91	3.91	6.35	6.35	6.35	5.3
Length (mm)	8.65	8.65	8.65	19.3	19.3	19.3	10.3
Thickness (mm)	1.58	1.58	1.58	3.9	3.9	3.9	1.95
Pitch (mm)	1.27	1.27	1.27	2.54	2.54	2.54	1.27
Max Height (mm)	1.75	1.75	1.75	5.08	5.08	5.08	2
Mechanical Data	下载	下载	下载	下载	下载	下载	下载

Parameters / Models	SN74LS21D	SN74LS21DR	SN74LS21DRG4	SN74LS21N	SN74LS21N3	SN74LS21NE4	SN74LS21NSR
Approx. Price (US$)					0.21 \| 1ku
Bits	2	2	2	2		2	2
Bits(#)					2
F @ Nom Voltage(Max)(Mhz)					35
ICC @ Nom Voltage(Max), mA	0.0025	0.0025	0.0025	0.0025		0.0025	0.0025
ICC @ Nom Voltage(Max)(mA)					0.0025
Input Type					TTL
Operating Temperature Range, C	0 to 70	0 to 70	0 to 70	0 to 70		0 to 70	0 to 70
Operating Temperature Range(C)					0 to 70
Output Drive (IOL/IOH)(Max), mA	-.04/8	-.04/8	-.04/8	-.04/8		-.04/8	-.04/8
Output Drive (IOL/IOH)(Max)(mA)					-.04/8
Output Type					TTL
Package Group	SOIC	SOIC	SOIC	PDIP	PDIP	PDIP	SO
Package Size: mm2:W x L, PKG	14SOIC: 52 mm2: 6 x 8.65(SOIC)	14SOIC: 52 mm2: 6 x 8.65(SOIC)	14SOIC: 52 mm2: 6 x 8.65(SOIC)	See datasheet (PDIP)		See datasheet (PDIP)	14SO: 80 mm2: 7.8 x 10.2(SO)
Package Size: mm2:W x L (PKG)					See datasheet (PDIP)
Rating	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog
Schmitt Trigger	No	No	No	No	No	No	No
Technology Family	LS	LS	LS	LS	LS	LS	LS
VCC(Max), V	5.25	5.25	5.25	5.25		5.25	5.25
VCC(Max)(V)					5.25
VCC(Min), V	4.75	4.75	4.75	4.75		4.75	4.75
VCC(Min)(V)					4.75
Voltage(Nom), V	5	5	5	5		5	5
Voltage(Nom)(V)					5
tpd @ Nom Voltage(Max), ns	15	15	15	15		15	15
tpd @ Nom Voltage(Max)(ns)					15

	SN74LS21D	SN74LS21DR	SN74LS21DRG4	SN74LS21N	SN74LS21N3	SN74LS21NE4	SN74LS21NSR
RoHS	Compliant	Compliant	Compliant	Compliant	Not Compliant	Compliant	Compliant
Pb Free	Yes	No	Yes

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Designing with the SN54/74LS123 (Rev. A)
PDF, 118 Kb, 修订版: A, 档案已发布: Mar 1, 1997
The Texas Instruments (TI) SN54/74LS123 dual retriggerable monostable multivibrator is a one-shot device capable of verylong output pulses and up to 100% duty cycle. The ?LS123 also features dc triggering from gated low-level active A andhigh-level active B inputs and provides a clear input that terminates the output pulse of any predetermined time independentof timing components R ext and

系列: SN74LS21 (7)