Datasheet Texas Instruments SN74LS191

Manufacturer	Texas Instruments
Series	SN74LS191

Synchronous 4-Bit Up/Down Counters With Up/Down Mode Control

Datasheets

PDF, 1.1 Mb, File published: Mar 1, 1988

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	SN74LS191D	SN74LS191DE4	SN74LS191DR	SN74LS191N	SN74LS191NSR
Lifecycle Status	Active (Recommended for new designs)	Active (Recommended for new designs)	Active (Recommended for new designs)	Active (Recommended for new designs)	Active (Recommended for new designs)
Manufacture's Sample Availability	No	No	No	No	No

	SN74LS191D	SN74LS191DE4	SN74LS191DR	SN74LS191N	SN74LS191NSR
N	1	2	3	4	5
Pin	16	16	16	16	16
Package Type	D	D	D	N	NS
Industry STD Term	SOIC	SOIC	SOIC	PDIP	SOP
JEDEC Code	R-PDSO-G	R-PDSO-G	R-PDSO-G	R-PDIP-T	R-PDSO-G
Package QTY	40	40	2500	25	2000
Carrier	TUBE	TUBE	LARGE T&R	TUBE	LARGE T&R
Device Marking	LS191	LS191	LS191	SN74LS191N	74LS191
Width (mm)	3.91	3.91	3.91	6.35	5.3
Length (mm)	9.9	9.9	9.9	19.3	10.3
Thickness (mm)	1.58	1.58	1.58	3.9	1.95
Pitch (mm)	1.27	1.27	1.27	2.54	1.27
Max Height (mm)	1.75	1.75	1.75	5.08	2
Mechanical Data	Download	Download	Download	Download	Download

Parameters / Models	SN74LS191D	SN74LS191DE4	SN74LS191DR	SN74LS191N	SN74LS191NSR
Bits	4	4	4	4	4
F @ Nom Voltage(Max), Mhz	35	35	35	35	35
Function	Counter	Counter	Counter	Counter	Counter
ICC @ Nom Voltage(Max), mA	105	105	105	105	105
Operating Temperature Range, C	0 to 70	0 to 70	0 to 70	0 to 70	0 to 70
Output Drive (IOL/IOH)(Max), mA	16/-0.8	16/-0.8	16/-0.8	16/-0.8	16/-0.8
Package Group	SOIC	SOIC	SOIC	PDIP	SO
Package Size: mm2:W x L, PKG	16SOIC: 59 mm2: 6 x 9.9(SOIC)	16SOIC: 59 mm2: 6 x 9.9(SOIC)	16SOIC: 59 mm2: 6 x 9.9(SOIC)	See datasheet (PDIP)	16SO: 80 mm2: 7.8 x 10.2(SO)
Rating	Catalog	Catalog	Catalog	Catalog	Catalog
Technology Family	LS	LS	LS	LS	LS
Type	Binary	Binary	Binary	Binary	Binary
VCC(Max), V	5.25	5.25	5.25	5.25	5.25
VCC(Min), V	4.75	4.75	4.75	4.75	4.75
Voltage(Nom), V	5	5	5	5	5
tpd @ Nom Voltage(Max), ns	52	52	52	52	52

	SN74LS191D	SN74LS191DE4	SN74LS191DR	SN74LS191N	SN74LS191NSR
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant
Pb Free	Yes

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Designing with the SN54/74LS123 (Rev. A)
PDF, 118 Kb, Revision: A, File published: 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

Series: SN74LS191 (5)