Register or Sign In

sn74lv139a price and stock

sn74lv139a Details
My Preferred Distributors (0) Authorized (0) Independent (0) Industrial Supplies / MRO (0)
Register or Sign In to sort your Preferred Distributors to the top of the list!

Authorized Distributors

  • Analog Devices Inc
  • Arrow
  • Avnet Americas
  • Bisco
  • CDM Electronics
  • Chip 1 Exchange
  • Chip1Stop
  • CHIPMALL.COM LIMITED
  • Coilcraft
  • ComSIT USA
  • DB Roberts
  • DigiKey
  • Dynamic Solutions
  • ECCO
  • ElectroCraft
  • Electroshield
  • ES Components
  • Fairview Microwave
  • FDH Electronics
  • Flip Electronics
  • Future Electronics
  • GLYN
  • Heilind Electronics
  • Interstate Connecting
  • Jameco
  • Karl Kruse
  • L-com US
  • Maritex
  • Master Electronics
  • Microchip Technology
  • Mouser
  • NAC
  • New Advantage
  • Newark
  • Onlinecomponents.com
  • Ozdisan Elektronik
  • Pasternack Enterprises
  • PEI Genesis
  • PolyPhaser
  • Powell Electronics
  • PUI
  • Relay Specialties
  • Renesas Electronics America
  • Richardson RFPD
  • Rochester
  • RS
  • Rutronik
  • Sager
  • Samtec
  • SiTime Corporation
  • South Electronics
  • STMicroelectronics
  • Symmetry
  • Techni-Tool
  • Teledyne e2v
  • TestEquity
  • TME
  • TTI
  • Venkel Ltd.
  • Verical
  • Waytek, Inc.
  • Wuhan P&S

Independent Distributors

  • Ameya
  • Bristol
  • Chip Stock
  • Chip-Germany GmbH
  • Component Electronics, Inc
  • CoreStaff
  • Direct Components
  • Futuretech Components
  • GlobX GmbH
  • Greenchips
  • IBS Electronics
  • JRH Electronics
  • LCSC
  • MacroQuest
  • Neutron USA
  • NexGen Digital
  • NTEMALL
  • Quest
  • SEMIX
  • Sense Electronic
  • Sensible Micro Corp
  • Shengyu Electronics
  • Velocity Electronics
  • Vyrian
  • Win Source Electronics
Show Filters
Select Manufacturer
Top of Page ↑

DigiKey ECIA (NEDA) Member • Authorized Distributor

Part # Manufacturer Description Stock Price Price Range Buy
SN74LV139AD DISTI # 2156-SN74LV139AD-ND
Texas Instruments IC DECODER/DEMUX 1X2:4 16SOIC Min Qty: 1 Lead time: 6 Weeks Container: Bulk MARKETPLACE PRODUCT SN74LV139AD Part Details 27267
In Stock
  • 526 $0.5700
$0.5700 Buy Now SN74LV139AD Part Details
SN74LV139ADBR DISTI # 2156-SN74LV139ADBR-ND
Texas Instruments IC DECODER/DEMUX 1X2:4 16SSOP Min Qty: 1 Lead time: 6 Weeks Container: Bulk MARKETPLACE PRODUCT SN74LV139ADBR Part Details 19526
In Stock
  • 2472 $0.1200
$0.1200 Buy Now SN74LV139ADBR Part Details
SN74LV139ANSR DISTI # 2156-SN74LV139ANSR-ND
Texas Instruments IC DECODER/DEMUX 1 X 2:4 16SO Min Qty: 1 Lead time: 6 Weeks Container: Bulk MARKETPLACE PRODUCT SN74LV139ANSR Part Details 16000
In Stock
  • 1066 $0.2800
$0.2800 Buy Now SN74LV139ANSR Part Details
SN74LV139APWT DISTI # 2156-SN74LV139APWT-ND
Texas Instruments IC DECODER/DEMUX 1X2:4 16TSSOP Min Qty: 1 Lead time: 6 Weeks Container: Bulk MARKETPLACE PRODUCT SN74LV139APWT Part Details 12500
In Stock
  • 584 $0.5100
$0.5100 Buy Now SN74LV139APWT Part Details
SN74LV139ADR DISTI # 2156-SN74LV139ADR-ND
Texas Instruments IC DECODER/DEMUX 1X2:4 16SOIC Min Qty: 1 Lead time: 6 Weeks Container: Bulk MARKETPLACE PRODUCT SN74LV139ADR Part Details 9980
In Stock
  • 2769 $0.1100
$0.1100 Buy Now SN74LV139ADR Part Details
SN74LV139APW DISTI # 2156-SN74LV139APW-ND
Texas Instruments IC DECODER/DEMUX 1X2:4 16TSSOP Min Qty: 1 Lead time: 8 Weeks Container: Bulk MARKETPLACE PRODUCT SN74LV139APW Part Details 9319
In Stock
  • 584 $0.5100
$0.5100 Buy Now SN74LV139APW Part Details
SN74LV139ADR DISTI # 296-31866-1-ND
Texas Instruments IC DECODER/DEMUX 1X2:4 16SOIC Min Qty: 1 Lead time: 6 Weeks Container: Digi-Reel®, Cut Tape (CT), Tape & Reel (TR) SN74LV139ADR Part Details 9265
In Stock
  • 62500 $0.1120
  • 25000 $0.1164
  • 12500 $0.1269
  • 5000 $0.1357
  • 2500 $0.1444
  • 1000 $0.1575
  • 500 $0.2101
  • 250 $0.2538
  • 100 $0.2801
  • 25 $0.3764
  • 10 $0.4110
  • 1 $0.5100
$0.1120 / $0.5100 Buy Now SN74LV139ADR Part Details
SN74LV139APWR DISTI # 296-3782-1-ND
Texas Instruments IC DECODER/DEMUX 1X2:4 16TSSOP Min Qty: 1 Lead time: 6 Weeks Container: Digi-Reel®, Cut Tape (CT), Tape & Reel (TR) SN74LV139APWR Part Details 5213
In Stock
  • 100000 $0.0826
  • 50000 $0.0846
  • 10000 $0.0958
  • 6000 $0.1024
  • 2000 $0.1090
  • 1000 $0.1189
  • 500 $0.1585
  • 250 $0.1916
  • 100 $0.2114
  • 25 $0.2840
  • 10 $0.3100
  • 1 $0.3800
$0.0826 / $0.3800 Buy Now SN74LV139APWR Part Details
SN74LV139ANS DISTI # 2156-SN74LV139ANS-ND
Texas Instruments DECODER/DRIVER Min Qty: 2049 Lead time: 1 Weeks Container: Bulk MARKETPLACE PRODUCT SN74LV139ANS Part Details 4500
In Stock
  • 2049 $0.1500
$0.1500 Buy Now SN74LV139ANS Part Details
SN74LV139ARGYR DISTI # 296-13934-1-ND
Texas Instruments IC DECODER/DEMUX 1X2:4 16VQFN Min Qty: 1 Lead time: 6 Weeks Container: Cut Tape (CT), Digi-Reel®, Tape & Reel (TR) SN74LV139ARGYR Part Details 3000
In Stock
  • 30000 $0.2071
  • 15000 $0.2153
  • 6000 $0.2236
  • 3000 $0.2402
  • 1000 $0.2650
  • 500 $0.3313
  • 250 $0.3892
  • 100 $0.4191
  • 25 $0.5136
  • 10 $0.5470
  • 1 $0.6200
$0.2071 / $0.6200 Buy Now SN74LV139ARGYR Part Details
SN74LV139ADBR DISTI # 296-3781-1-ND
Texas Instruments IC DECODER/DEMUX 1X2:4 16SSOP Min Qty: 1 Lead time: 6 Weeks Container: Cut Tape (CT), Digi-Reel®, Tape & Reel (TR) SN74LV139ADBR Part Details 1986
In Stock
  • 2000 $0.1050
  • 1000 $0.2779
  • 500 $0.3474
  • 250 $0.4082
  • 100 $0.4395
  • 25 $0.5384
  • 10 $0.5730
  • 1 $0.6500
$0.1050 / $0.6500 Buy Now SN74LV139ADBR Part Details
SN74LV139ANSR DISTI # 296-28945-1-ND
Texas Instruments IC DECODER/DEMUX 1 X 2:4 16SO Min Qty: 1 Lead time: 6 Weeks Container: Cut Tape (CT), Digi-Reel®, Tape & Reel (TR) SN74LV139ANSR Part Details 1928
In Stock
  • 2000 $0.2437
  • 1000 $0.3151
  • 500 $0.3939
  • 250 $0.4628
  • 100 $0.4983
  • 25 $0.6104
  • 10 $0.6500
  • 1 $0.7400
$0.2437 / $0.7400 Buy Now SN74LV139ANSR Part Details
SN74LV139AD DISTI # 296-1677-5-ND
Texas Instruments IC DECODER/DEMUX 1X2:4 16SOIC Min Qty: 1 Lead time: 6 Weeks Container: Tube SN74LV139AD Part Details 1351
In Stock
  • 1000 $0.5984
  • 520 $0.7580
  • 280 $0.8578
  • 120 $0.9176
  • 40 $1.1170
  • 10 $1.1770
  • 1 $1.3200
$0.5984 / $1.3200 Buy Now SN74LV139AD Part Details
SN74LV139APW DISTI # 296-SN74LV139APW-ND
Texas Instruments IC DECODER/DEMUX 1X2:4 16TSSOP Min Qty: 1 Lead time: 8 Weeks Container: Tube SN74LV139APW Part Details 1089
In Stock
  • 1000 $0.5934
  • 500 $0.6435
  • 250 $0.7036
  • 100 $0.8020
  • 25 $1.0036
  • 10 $1.1820
  • 1 $1.8600
$0.5934 / $1.8600 Buy Now SN74LV139APW Part Details
SN74LV139APWT DISTI # 296-SN74LV139APWTCT-ND
Texas Instruments IC DECODER/DEMUX 1X2:4 16TSSOP Min Qty: 1 Lead time: 6 Weeks Container: Digi-Reel®, Cut Tape (CT), Tape & Reel (TR) SN74LV139APWT Part Details 1041
In Stock
  • 12500 $0.4654
  • 6250 $0.4836
  • 2500 $0.5090
  • 1250 $0.5454
  • 500 $0.6908
  • 250 $0.7818
  • 100 $0.8363
  • 25 $1.0180
  • 10 $1.0730
  • 1 $1.2000
$0.4654 / $1.2000 Buy Now SN74LV139APWT Part Details

View all 'sn74lv139a' results from DigiKey

View all 'sn74lv139a' results from DigiKey

Top of Page ↑

Mouser Electronics ECIA (NEDA) Member • Authorized Distributor

Part # Manufacturer Description Stock Price Price Range Buy
SN74LV139ADR DISTI # 595-SN74LV139ADR
Texas Instruments Encoders, Decoders, Multiplexers & Demultiplexers Dual 2 to 4-Line Decdr/Demltplxer RoHS: Compliant SN74LV139ADR Part Details 3895
  • 1 $0.5100
  • 10 $0.3770
  • 100 $0.2540
  • 500 $0.2110
  • 1000 $0.1870
  • 2500 $0.1440
  • 5000 $0.1350
  • 10000 $0.1260
  • 25000 $0.1160
$0.1160 / $0.5100 Buy Now SN74LV139ADR Part Details
SN74LV139APWR DISTI # 595-SN74LV139APWR
Texas Instruments Encoders, Decoders, Multiplexers & Demultiplexers Dual RoHS: Compliant SN74LV139APWR Part Details 3858
  • 1 $0.3600
  • 10 $0.2650
  • 100 $0.1460
  • 1000 $0.1190
  • 2000 $0.1020
  • 10000 $0.0950
  • 24000 $0.0930
  • 50000 $0.0840
$0.0840 / $0.3600 Buy Now SN74LV139APWR Part Details
SN74LV139ARGYR DISTI # 595-SN74LV139ARGYR
Texas Instruments Encoders, Decoders, Multiplexers & Demultiplexers Dual RoHS: Compliant SN74LV139ARGYR Part Details 2900
  • 1 $0.6200
  • 10 $0.5140
  • 100 $0.3900
  • 500 $0.3310
  • 1000 $0.2640
  • 3000 $0.2400
  • 6000 $0.2140
  • 9000 $0.2060
  • 24000 $0.1990
$0.1990 / $0.6200 Buy Now SN74LV139ARGYR Part Details
SN74LV139ANSR DISTI # 595-SN74LV139ANSR
Texas Instruments Encoders, Decoders, Multiplexers & Demultiplexers Dual 2 to 4-Line Decdr/Demltplxer RoHS: Compliant SN74LV139ANSR Part Details 1700
  • 1 $0.7400
  • 10 $0.6110
  • 100 $0.4630
  • 500 $0.3930
  • 1000 $0.3150
  • 2000 $0.2430
$0.2430 / $0.7400 Buy Now SN74LV139ANSR Part Details
SN74LV139ANSRE4 DISTI # 595-SN74LV139ANSRE4
Texas Instruments Encoders, Decoders, Multiplexers & Demultiplexers Dual 2 to 4-Line Decdr/Demltplxer RoHS: Compliant SN74LV139ANSRE4 Part Details 69
  • 1 $0.7500
  • 10 $0.6500
  • 100 $0.4990
  • 500 $0.3940
  • 1000 $0.3240
  • 2000 $0.2510
  • 4000 $0.2340
$0.2340 / $0.7500 Buy Now SN74LV139ANSRE4 Part Details
SN74LV139ADBR DISTI # 595-SN74LV139ADBR
Texas Instruments Encoders, Decoders, Multiplexers & Demultiplexers Dual RoHS: Compliant SN74LV139ADBR Part Details 0
  • 1 $0.6100
  • 10 $0.4960
  • 100 $0.3240
  • 1000 $0.2080
  • 2000 $0.1050
$0.1050 / $0.6100 Order Now SN74LV139ADBR Part Details

View all 'sn74lv139a' results from Mouser Electronics

Top of Page ↑

Arrow Electronics Authorized Distributor

Part # Manufacturer Description Stock Price Price Range Buy
SN74LV139APWR DISTI # J56:1989_00103515
Texas Instruments Decoder/Demultiplexer Dual 2-to-4 16-Pin TSSOP T/R RoHS: Compliant Min Qty: 2000 Package Multiple: 2000 Lead time: 6 Weeks SN74LV139APWR Part Details Europe - 4000
  • 50000 $0.0828
  • 10000 $0.0828
  • 6000 $0.0828
  • 2000 $0.0828
$0.0828 Buy Now SN74LV139APWR Part Details
SN74LV139APWR DISTI # V72:2272_07346279
Texas Instruments Decoder/Demultiplexer Dual 2-to-4 16-Pin TSSOP T/R RoHS: Compliant Min Qty: 1 Package Multiple: 1 Lead time: 6 Weeks Date Code: 2213 Container: Cut Strips SN74LV139APWR Part Details Americas - 816
  • 500 $0.0828
  • 250 $0.1012
  • 100 $0.1195
  • 25 $0.1378
  • 10 $0.1392
  • 1 $0.1908
$0.0828 / $0.1908 Buy Now SN74LV139APWR Part Details
Top of Page ↑

Verical Authorized Distributor

Part # Manufacturer Description Stock Price Price Range Buy
SN74LV139APWR DISTI # 66196641
Texas Instruments Decoder/Demultiplexer Dual 2-to-4 16-Pin TSSOP T/R RoHS: Compliant Min Qty: 29 Package Multiple: 1 Date Code: 2213 SN74LV139APWR Part Details Americas - 816
  • 500 $0.0828
$0.0828 Buy Now SN74LV139APWR Part Details
Top of Page ↑

Bristol Electronics  

Part # Manufacturer Description Stock Price Price Range Buy
SN74LV139ADR
Texas Instruments   SN74LV139ADR Part Details 4465   RFQ SN74LV139ADR Part Details
SN74LV139APWRG4
Texas Instruments   Min Qty: 7 SN74LV139APWRG4 Part Details 355
  • 135 $0.2250
  • 21 $0.3750
  • 7 $0.7500
$0.2250 / $0.7500 Buy Now SN74LV139APWRG4 Part Details
SN74LV139AD
Texas Instruments   SN74LV139AD Part Details 160   RFQ SN74LV139AD Part Details
SN74LV139A
Texas Instruments   SN74LV139A Part Details 61   RFQ SN74LV139A Part Details
Top of Page ↑

Quest Components  

Part # Manufacturer Description Stock Price Price Range Buy
SN74LV139APWRG4
Texas Instruments   SN74LV139APWRG4 Part Details 284
  • 168 $0.2000
  • 21 $0.3000
  • 1 $1.0000
$0.2000 / $1.0000 Buy Now SN74LV139APWRG4 Part Details
Top of Page ↑

Rochester Electronics ECIA (NEDA) Member • Authorized Distributor

Part # Manufacturer Description Stock Price Price Range Buy
SN74LV139ADE4
Texas Instruments Decoder/Driver, LV/LV-A/LVX/H Series, Inverted Output, PDSO16 ' RoHS: Compliant Status: Obsolete Min Qty: 1 SN74LV139ADE4 Part Details 2500
  • 1000 $0.0870
  • 500 $0.0922
  • 100 $0.0963
  • 25 $0.1004
  • 1 $0.1024
$0.0870 / $0.1024 Buy Now SN74LV139ADE4 Part Details
SN74LV139APW
Texas Instruments SN74LV139A Dual 2-Line To 4-Line Decoders/Demultiplexers RoHS: Compliant Status: Obsolete Min Qty: 1 SN74LV139APW Part Details 9319
  • 1000 $0.4413
  • 500 $0.4673
  • 100 $0.4880
  • 25 $0.5088
  • 1 $0.5192
$0.4413 / $0.5192 Buy Now SN74LV139APW Part Details
SN74LV139APWT
Texas Instruments SN74LV139A Dual 2-Line To 4-Line Decoders/Demultiplexers RoHS: Compliant Status: Obsolete Min Qty: 1 SN74LV139APWT Part Details 12500
  • 1000 $0.4413
  • 500 $0.4673
  • 100 $0.4880
  • 25 $0.5088
  • 1 $0.5192
$0.4413 / $0.5192 Buy Now SN74LV139APWT Part Details
SN74LV139APWR
Texas Instruments Dual 2-Line To 4-Line Decoders/Demultiplexers 16-TSSOP -40 to 85 RoHS: Compliant Status: Active Min Qty: 1 SN74LV139APWR Part Details 69
  • 1000 $0.0793
  • 500 $0.0840
  • 100 $0.0877
  • 25 $0.0914
  • 1 $0.0933
$0.0793 / $0.0933 Buy Now SN74LV139APWR Part Details
SN74LV139ADGVR
Texas Instruments Decoder/Driver, LV/LV-A/LVX/H Series, Inverted Output, PDSO16 ' RoHS: Compliant Status: Obsolete Min Qty: 1 SN74LV139ADGVR Part Details 3642
  • 1000 $0.1354
  • 500 $0.1434
  • 100 $0.1497
  • 25 $0.1561
  • 1 $0.1593
$0.1354 / $0.1593 Buy Now SN74LV139ADGVR Part Details
SN74LV139ANS
Texas Instruments Decoder/Driver, LV/LV-A/LVX/H Series, Inverted Output, PDSO16 ' RoHS: Compliant Status: Obsolete Min Qty: 1 SN74LV139ANS Part Details 4500
  • 1000 $0.1257
  • 500 $0.1331
  • 100 $0.1390
  • 25 $0.1449
  • 1 $0.1479
$0.1257 / $0.1479 Buy Now SN74LV139ANS Part Details
SN74LV139ANSR
Texas Instruments SN74LV139A Dual 2-Line To 4-Line Decoders/Demultiplexers RoHS: Compliant Status: Active Min Qty: 1 SN74LV139ANSR Part Details 6000
  • 1000 $0.2417
  • 500 $0.2560
  • 100 $0.2673
  • 25 $0.2787
  • 1 $0.2844
$0.2417 / $0.2844 Buy Now SN74LV139ANSR Part Details
SN74LV139ADBR
Texas Instruments SN74LV139A Dual 2-Line To 4-Line Decoders/Demultiplexers RoHS: Compliant Status: Active Min Qty: 1 SN74LV139ADBR Part Details 4000
  • 1000 $0.1041
  • 500 $0.1103
  • 100 $0.1152
  • 25 $0.1201
  • 1 $0.1225
$0.1041 / $0.1225 Buy Now SN74LV139ADBR Part Details
SN74LV139ADR
Texas Instruments SN74LV139A Dual 2-Line To 4-Line Decoders/Demultiplexers RoHS: Compliant Status: Active Min Qty: 1 SN74LV139ADR Part Details 9980
  • 1000 $0.0930
  • 500 $0.0985
  • 100 $0.1028
  • 25 $0.1072
  • 1 $0.1094
$0.0930 / $0.1094 Buy Now SN74LV139ADR Part Details
SN74LV139AD
Texas Instruments SN74LV139A Dual 2-Line To 4-Line Decoders/Demultiplexers RoHS: Compliant Status: Obsolete Min Qty: 1 SN74LV139AD Part Details 27267
  • 1000 $0.4896
  • 500 $0.5184
  • 100 $0.5414
  • 25 $0.5645
  • 1 $0.5760
$0.4896 / $0.5760 Buy Now SN74LV139AD Part Details

View all 'sn74lv139a' results from Rochester Electronics

Top of Page ↑

Sensible Micro Corporation  

Part # Manufacturer Description Stock Price Price Range Buy
SN74LV139APWR DISTI # SMC-SN74LV139APWR
Texas Instruments AS6081 Certified Vendor, 1 Yr Warranty RoHS: Not Compliant Min Qty: 25 Lead time: 2 Weeks, 0 Days SN74LV139APWR Part Details 561   RFQ SN74LV139APWR Part Details
Top of Page ↑

Ameya Holding Limited  

Part # Manufacturer Description Stock Price Price Range Buy
SN74LV139APWR
Texas Instruments SN74LV139APWR, 双 反相 解码器、多路分解器, 4 线解复, 2 → 5.5 V电源, 16针 TSSOP封装 SN74LV139APWR Part Details 155733   RFQ SN74LV139APWR Part Details
SN74LV139APW
Texas Instruments IC: digital, 2-to-4 lines,decoder,demultiplexer, SMD, TSSOP16 SN74LV139APW Part Details 12245   RFQ SN74LV139APW Part Details
SN74LV139AD
Texas Instruments SN74LV139AD, 双 反相 解码器、多路分解器, 4 线解复, 2 → 5.5 V电源, 16针 SOIC封装 SN74LV139AD Part Details 2111   RFQ SN74LV139AD Part Details
Top of Page ↑

Component Electronics, Inc  

Part # Manufacturer Description Stock Price Price Range Buy
SN74LV139APWR
Texas Instruments IN STOCK SHIP TODAY SN74LV139APWR Part Details 16
  • 1000 $0.8000
  • 100 $0.9200
  • 1 $1.2300
$0.8000 / $1.2300 Buy Now SN74LV139APWR Part Details
Top of Page ↑

Chip1Stop Authorized Distributor

Part # Manufacturer Description Stock Price Price Range Buy
SN74LV139APWR DISTI # C1S746204502639
Texas Instruments Analog Switches, Multiplexers, Demultiplexers RoHS: Compliant pbFree: Yes SN74LV139APWR Part Details 816
  • 10 $0.3230
  • 25 $0.2980
  • 100 $0.2040
$0.2040 / $0.3230 Buy Now SN74LV139APWR Part Details
Top of Page ↑

CHIPMALL.COM LIMITED  

Part # Manufacturer Description Stock Price Price Range Buy
SN74LV139ADR
Texas Instruments IC DECODER/DEMUX 1X2:4 16SOIC SN74LV139ADR Part Details 770
  • 1 $0.3589
  • 10 $0.2805
  • 100 $0.2096
  • 500 $0.2005
  • 1000 $0.1945
$0.1945 / $0.3589 Buy Now SN74LV139ADR Part Details
Top of Page ↑

LCSC  

Part # Manufacturer Description Stock Price Price Range Buy
SN74LV139ADR
Texas Instruments 12mA 2V5.5V 12mA SOIC-16 Signal Switches Multiplexers Decoders ROHS SN74LV139ADR Part Details 765
  • 1000 $0.2026
  • 500 $0.2089
  • 100 $0.2183
  • 30 $0.2529
  • 10 $0.2922
  • 1 $0.3738
$0.2026 / $0.3738 Buy Now SN74LV139ADR Part Details
SN74LV139APWR
Texas Instruments TSSOP-16 Analog Switches Multiplexers ROHS SN74LV139APWR Part Details 60
  • 4000 $0.1072
  • 2000 $0.1122
  • 500 $0.1204
  • 150 $0.1468
  • 50 $0.1616
  • 5 $0.1962
$0.1072 / $0.1962 Buy Now SN74LV139APWR Part Details

Associated Part Details

Most Popular Decoder/Drivers

Most Popular Part Numbers