|
|
Interface - I/O Expanders Remote 8B I2C & SMBu s Lo-Pwr I/O Exp
- PCA9557DGVR
- Texas Instruments
-
1:
CHF 2.58
-
2’335In Stock
|
Mouser Part No
595-PCA9557DGVR
|
Texas Instruments
|
Interface - I/O Expanders Remote 8B I2C & SMBu s Lo-Pwr I/O Exp
|
|
2’335In Stock
|
|
|
CHF 2.58
|
|
|
CHF 1.94
|
|
|
CHF 1.78
|
|
|
CHF 1.60
|
|
|
View
|
|
|
CHF 1.28
|
|
|
CHF 1.51
|
|
|
CHF 1.48
|
|
|
CHF 1.41
|
|
|
CHF 1.28
|
|
Min.: 1
Mult.: 1
:
2’000
|
|
|
PCA9557
|
SMD/SMT
|
TVSOP-16
|
I2C, Serial, SMBus
|
8 I/O
|
Without Interrupt
|
2.5 V
|
6 V
|
400 kHz
|
- 40 C
|
+ 85 C
|
Reel, Cut Tape, MouseReel
|
2 kV
|
|
|
|
Interface - I/O Expanders Remote 8B I2C & SMBu s Lo-Pwr I/O Exp A A 595-PCA9557DB
- PCA9557DBR
- Texas Instruments
-
1:
CHF 2.29
-
2’174In Stock
|
Mouser Part No
595-PCA9557DBR
|
Texas Instruments
|
Interface - I/O Expanders Remote 8B I2C & SMBu s Lo-Pwr I/O Exp A A 595-PCA9557DB
|
|
2’174In Stock
|
|
|
CHF 2.29
|
|
|
CHF 1.71
|
|
|
CHF 1.56
|
|
|
CHF 1.40
|
|
|
View
|
|
|
CHF 1.16
|
|
|
CHF 1.33
|
|
|
CHF 1.30
|
|
|
CHF 1.24
|
|
|
CHF 1.16
|
|
Min.: 1
Mult.: 1
:
2’000
|
|
|
PCA9557
|
SMD/SMT
|
SSOP-16
|
I2C, Serial, SMBus
|
8 I/O
|
Without Interrupt
|
2.5 V
|
6 V
|
400 kHz
|
- 40 C
|
+ 85 C
|
Reel, Cut Tape, MouseReel
|
2 kV
|
|
|
|
Interface - I/O Expanders Remote 8-Bit I/O Exp ander for I2C-Bus A ALT 595-PCF8574AN
- PCF8574ANE4
- Texas Instruments
-
1:
CHF 3.48
-
126In Stock
|
Mouser Part No
595-PCF8574ANE4
|
Texas Instruments
|
Interface - I/O Expanders Remote 8-Bit I/O Exp ander for I2C-Bus A ALT 595-PCF8574AN
|
|
126In Stock
|
|
|
CHF 3.48
|
|
|
CHF 2.70
|
|
|
CHF 2.30
|
|
|
CHF 2.17
|
|
|
View
|
|
|
CHF 2.06
|
|
|
CHF 2.04
|
|
|
CHF 1.91
|
|
|
CHF 1.87
|
|
Min.: 1
Mult.: 1
|
|
|
PCF8574A
|
Through Hole
|
PDIP-16
|
I2C, Serial
|
8 I/O
|
With Interrupt
|
2.5 V
|
6 V
|
100 kHz
|
- 40 C
|
+ 85 C
|
Tube
|
1 kV
|
|
|
|
Interface - I/O Expanders Rem 8B I2C & SMBus L o-Pwr I/O Expander A 595-PCA9557DBR
- PCA9557DB
- Texas Instruments
-
1:
CHF 3.16
-
400In Stock
|
Mouser Part No
595-PCA9557DB
|
Texas Instruments
|
Interface - I/O Expanders Rem 8B I2C & SMBus L o-Pwr I/O Expander A 595-PCA9557DBR
|
|
400In Stock
|
|
|
CHF 3.16
|
|
|
CHF 2.35
|
|
|
CHF 2.16
|
|
|
CHF 1.90
|
|
|
View
|
|
|
CHF 1.83
|
|
|
CHF 1.79
|
|
|
CHF 1.69
|
|
|
CHF 1.67
|
|
|
CHF 1.66
|
|
Min.: 1
Mult.: 1
|
|
|
PCA9557
|
SMD/SMT
|
SSOP-16
|
I2C, Serial, SMBus
|
8 I/O
|
Without Interrupt
|
2.5 V
|
6 V
|
400 kHz
|
- 40 C
|
+ 85 C
|
Tube
|
2 kV
|
|
|
|
Interface - I/O Expanders Remote 8B I2C & SMBu s Lo-Pwr I/O Exp
- PCA9557RGYR
- Texas Instruments
-
1:
CHF 2.30
-
3’148In Stock
|
Mouser Part No
595-PCA9557RGYR
|
Texas Instruments
|
Interface - I/O Expanders Remote 8B I2C & SMBu s Lo-Pwr I/O Exp
|
|
3’148In Stock
|
|
|
CHF 2.30
|
|
|
CHF 1.71
|
|
|
CHF 1.57
|
|
|
CHF 1.41
|
|
|
CHF 1.33
|
|
|
View
|
|
|
CHF 1.33
|
|
|
CHF 1.21
|
|
Min.: 1
Mult.: 1
:
3’000
|
|
|
PCA9557
|
SMD/SMT
|
VQFN-16
|
I2C, Serial, SMBus
|
8 I/O
|
Without Interrupt
|
2.5 V
|
6 V
|
400 kHz
|
- 40 C
|
+ 85 C
|
Reel, Cut Tape, MouseReel
|
2 kV
|
|
|
|
Interface - I/O Expanders Remote 8-Bit I/O Exp ander for I2C-Bus
- PCF8574ADGVR
- Texas Instruments
-
1:
CHF 2.76
-
3’744In Stock
|
Mouser Part No
595-PCF8574ADGVR
|
Texas Instruments
|
Interface - I/O Expanders Remote 8-Bit I/O Exp ander for I2C-Bus
|
|
3’744In Stock
|
|
|
CHF 2.76
|
|
|
CHF 2.12
|
|
|
CHF 2.01
|
|
|
CHF 1.93
|
|
|
CHF 1.50
|
|
|
View
|
|
|
CHF 1.90
|
|
|
CHF 1.85
|
|
|
CHF 1.49
|
|
Min.: 1
Mult.: 1
:
2’000
|
|
|
PCF8574A
|
SMD/SMT
|
TVSOP-20
|
I2C, Serial
|
8 I/O
|
With Interrupt
|
2.5 V
|
6 V
|
100 kHz
|
- 40 C
|
+ 85 C
|
Reel, Cut Tape, MouseReel
|
1 kV
|
|
|
|
Interface - I/O Expanders 8bit I/O Expndr
- PCF8574AN
- Texas Instruments
-
1:
CHF 3.43
-
858In Stock
|
Mouser Part No
595-PCF8574AN
|
Texas Instruments
|
Interface - I/O Expanders 8bit I/O Expndr
|
|
858In Stock
|
|
|
CHF 3.43
|
|
|
CHF 2.59
|
|
|
CHF 2.33
|
|
|
CHF 2.12
|
|
|
View
|
|
|
CHF 2.01
|
|
|
CHF 1.97
|
|
|
CHF 1.91
|
|
|
CHF 1.86
|
|
Min.: 1
Mult.: 1
|
|
|
PCF8574A
|
Through Hole
|
PDIP-16
|
I2C, Serial
|
8 I/O
|
With Interrupt
|
2.5 V
|
6 V
|
100 kHz
|
- 40 C
|
+ 85 C
|
Tube
|
1 kV
|
|
|
|
Interface - I/O Expanders 8bit I/O Expndr A 59 5-PCF8574APW A 595- A 595-PCF8574APW
- PCF8574APWR
- Texas Instruments
-
1:
CHF 1.26
-
2’895In Stock
-
10’000Expected 12/17/2026
|
Mouser Part No
595-PCF8574APWR
|
Texas Instruments
|
Interface - I/O Expanders 8bit I/O Expndr A 59 5-PCF8574APW A 595- A 595-PCF8574APW
|
|
2’895In Stock
10’000Expected 12/17/2026
|
|
|
CHF 1.26
|
|
|
CHF 0.92
|
|
|
CHF 0.841
|
|
|
CHF 0.741
|
|
|
View
|
|
|
CHF 0.629
|
|
|
CHF 0.697
|
|
|
CHF 0.67
|
|
|
CHF 0.664
|
|
|
CHF 0.629
|
|
Min.: 1
Mult.: 1
:
2’000
|
|
|
PCF8574A
|
SMD/SMT
|
TSSOP-20
|
I2C, Serial
|
8 I/O
|
With Interrupt
|
2.5 V
|
6 V
|
100 kHz
|
- 40 C
|
+ 85 C
|
Reel, Cut Tape, MouseReel
|
1 kV
|
|
|
|
Interface - I/O Expanders Remote 8-Bit I/O Exp ander for I2C-Bus
- PCF8574DGVR
- Texas Instruments
-
1:
CHF 3.32
-
1’871In Stock
|
Mouser Part No
595-PCF8574DGVR
|
Texas Instruments
|
Interface - I/O Expanders Remote 8-Bit I/O Exp ander for I2C-Bus
|
|
1’871In Stock
|
|
|
CHF 3.32
|
|
|
CHF 2.51
|
|
|
CHF 2.30
|
|
|
CHF 2.07
|
|
|
CHF 2.01
|
|
|
CHF 1.70
|
|
Min.: 1
Mult.: 1
:
2’000
|
|
|
PCF8574
|
SMD/SMT
|
TVSOP-20
|
I2C, Serial
|
8 I/O
|
With Interrupt
|
2.5 V
|
6 V
|
100 kHz
|
- 40 C
|
+ 85 C
|
Reel, Cut Tape, MouseReel
|
1 kV
|
|
|
|
Interface - I/O Expanders Remote 8-Bit I/O Exp ander for I2C-Bus
- PCF8574RGYR
- Texas Instruments
-
1:
CHF 1.77
-
1’413In Stock
|
Mouser Part No
595-PCF8574RGYR
|
Texas Instruments
|
Interface - I/O Expanders Remote 8-Bit I/O Exp ander for I2C-Bus
|
|
1’413In Stock
|
|
|
CHF 1.77
|
|
|
CHF 1.32
|
|
|
CHF 1.20
|
|
|
CHF 1.07
|
|
|
CHF 0.904
|
|
|
View
|
|
|
CHF 1.01
|
|
|
CHF 0.987
|
|
|
CHF 0.959
|
|
|
CHF 0.872
|
|
Min.: 1
Mult.: 1
:
3’000
|
|
|
PCF8574
|
SMD/SMT
|
VQFN-20
|
I2C, Serial
|
8 I/O
|
With Interrupt
|
2.5 V
|
6 V
|
100 kHz
|
- 40 C
|
+ 85 C
|
Reel, Cut Tape, MouseReel
|
1 kV
|
|
|
|
Interface - I/O Expanders Remote 8B I2C & SMBu s I/O Expander A 59 A 595-PCA9557PW
- PCA9557PWR
- Texas Instruments
-
1:
CHF 1.63
-
1’929In Stock
-
4’000Expected 10/1/2026
|
Mouser Part No
595-PCA9557PWR
|
Texas Instruments
|
Interface - I/O Expanders Remote 8B I2C & SMBu s I/O Expander A 59 A 595-PCA9557PW
|
|
1’929In Stock
4’000Expected 10/1/2026
|
|
|
CHF 1.63
|
|
|
CHF 1.21
|
|
|
CHF 1.11
|
|
|
CHF 0.987
|
|
|
CHF 0.857
|
|
|
View
|
|
|
CHF 0.931
|
|
|
CHF 0.896
|
|
|
CHF 0.872
|
|
|
CHF 0.841
|
|
Min.: 1
Mult.: 1
:
2’000
|
|
|
PCA9557
|
SMD/SMT
|
TSSOP-16
|
I2C, Serial, SMBus
|
8 I/O
|
Without Interrupt
|
2.5 V
|
6 V
|
400 kHz
|
- 40 C
|
+ 85 C
|
Reel, Cut Tape, MouseReel
|
2 kV
|
|
|
|
Interface - I/O Expanders 8bit I/O Expndr A 59 5-PCF8574ADW A 595- A 595-PCF8574ADW
- PCF8574ADWR
- Texas Instruments
-
1:
CHF 1.26
-
5’821In Stock
|
Mouser Part No
595-PCF8574ADWR
|
Texas Instruments
|
Interface - I/O Expanders 8bit I/O Expndr A 59 5-PCF8574ADW A 595- A 595-PCF8574ADW
|
|
5’821In Stock
|
|
|
CHF 1.26
|
|
|
CHF 0.92
|
|
|
CHF 0.841
|
|
|
CHF 0.741
|
|
|
CHF 0.621
|
|
|
View
|
|
|
CHF 0.697
|
|
|
CHF 0.67
|
|
|
CHF 0.664
|
|
|
CHF 0.608
|
|
Min.: 1
Mult.: 1
:
2’000
|
|
|
PCF8574A
|
SMD/SMT
|
SOIC-16
|
I2C, Serial
|
8 I/O
|
With Interrupt
|
2.5 V
|
6 V
|
100 kHz
|
- 40 C
|
+ 85 C
|
Reel, Cut Tape, MouseReel
|
1 kV
|
|
|
|
Interface - I/O Expanders 8bit I/O Expndr A 59 5-PCF8574PW A 595-P A 595-PCF8574PW
- PCF8574PWR
- Texas Instruments
-
1:
CHF 1.45
-
4’799In Stock
|
Mouser Part No
595-PCF8574PWR
|
Texas Instruments
|
Interface - I/O Expanders 8bit I/O Expndr A 59 5-PCF8574PW A 595-P A 595-PCF8574PW
|
|
4’799In Stock
|
|
|
CHF 1.45
|
|
|
CHF 1.06
|
|
|
CHF 0.968
|
|
|
CHF 0.864
|
|
|
View
|
|
|
CHF 0.727
|
|
|
CHF 0.809
|
|
|
CHF 0.778
|
|
|
CHF 0.775
|
|
|
CHF 0.727
|
|
Min.: 1
Mult.: 1
:
2’000
|
|
|
PCF8574
|
SMD/SMT
|
TSSOP-20
|
I2C, Serial
|
8 I/O
|
With Interrupt
|
2.5 V
|
6 V
|
100 kHz
|
- 40 C
|
+ 85 C
|
Reel, Cut Tape, MouseReel
|
1 kV
|
|
|
|
Interface - I/O Expanders Remote 8B I2C & SMBu s Lo-Pwr I/O Exp A A 595-PCA9557D
- PCA9557DR
- Texas Instruments
-
1:
CHF 1.39
-
680In Stock
-
2’240Expected 8/27/2026
|
Mouser Part No
595-PCA9557DR
|
Texas Instruments
|
Interface - I/O Expanders Remote 8B I2C & SMBu s Lo-Pwr I/O Exp A A 595-PCA9557D
|
|
680In Stock
2’240Expected 8/27/2026
|
|
|
CHF 1.39
|
|
|
CHF 1.02
|
|
|
CHF 0.931
|
|
|
CHF 0.824
|
|
|
CHF 0.694
|
|
|
View
|
|
|
CHF 0.774
|
|
|
CHF 0.745
|
|
|
CHF 0.741
|
|
|
CHF 0.669
|
|
Min.: 1
Mult.: 1
:
2’500
|
|
|
PCA9557
|
SMD/SMT
|
SOIC-Narrow-16
|
I2C, Serial, SMBus
|
8 I/O
|
Without Interrupt
|
2.5 V
|
6 V
|
400 kHz
|
- 40 C
|
+ 85 C
|
Reel, Cut Tape, MouseReel
|
2 kV
|
|
|
|
Interface - I/O Expanders Remote 8-Bit I2C and SMBus LP I/O Exp
- PCA9557RGVR
- Texas Instruments
-
1:
CHF 1.60
-
17’391On Order
|
Mouser Part No
595-PCA9557RGVR
|
Texas Instruments
|
Interface - I/O Expanders Remote 8-Bit I2C and SMBus LP I/O Exp
|
|
17’391On Order
On Order:
7’391 Expected 12/10/2026
10’000 Expected 7/23/2027
Factory Lead Time:
9 Weeks
|
|
|
CHF 1.60
|
|
|
CHF 1.18
|
|
|
CHF 1.08
|
|
|
CHF 0.94
|
|
|
CHF 0.787
|
|
|
View
|
|
|
CHF 0.888
|
|
|
CHF 0.857
|
|
|
CHF 0.841
|
|
|
CHF 0.766
|
|
Min.: 1
Mult.: 1
:
2’500
|
|
|
PCA9557
|
SMD/SMT
|
VQFN-16
|
I2C, Serial, SMBus
|
8 I/O
|
Without Interrupt
|
2.5 V
|
6 V
|
400 kHz
|
- 40 C
|
+ 85 C
|
Reel, Cut Tape, MouseReel
|
2 kV
|
|
|
|
Interface - I/O Expanders Remote 8-Bit I/O Exp ander for I2C-Bus
- PCF8574ARGYR
- Texas Instruments
-
1:
CHF 2.03
-
943In Stock
|
Mouser Part No
595-PCF8574ARGYR
|
Texas Instruments
|
Interface - I/O Expanders Remote 8-Bit I/O Exp ander for I2C-Bus
|
|
943In Stock
|
|
|
CHF 2.03
|
|
|
CHF 1.51
|
|
|
CHF 1.39
|
|
|
CHF 1.24
|
|
|
CHF 1.04
|
|
|
View
|
|
|
CHF 1.17
|
|
|
CHF 1.16
|
|
|
CHF 1.01
|
|
Min.: 1
Mult.: 1
:
3’000
|
|
|
PCF8574A
|
SMD/SMT
|
VQFN-20
|
I2C, Serial
|
8 I/O
|
With Interrupt
|
2.5 V
|
6 V
|
100 kHz
|
- 40 C
|
+ 85 C
|
Reel, Cut Tape, MouseReel
|
1 kV
|
|
|
|
Interface - I/O Expanders 8bit I/O Expndr
- PCF8574N
- Texas Instruments
-
1:
CHF 2.36
-
16’057On Order
|
Mouser Part No
595-PCF8574N
|
Texas Instruments
|
Interface - I/O Expanders 8bit I/O Expndr
|
|
16’057On Order
On Order:
5’157 Expected 8/26/2026
10’900 Expected 9/14/2026
Factory Lead Time:
9 Weeks
|
|
|
CHF 2.36
|
|
|
CHF 1.77
|
|
|
CHF 1.61
|
|
|
CHF 1.45
|
|
|
View
|
|
|
CHF 1.37
|
|
|
CHF 1.33
|
|
|
CHF 1.27
|
|
|
CHF 1.24
|
|
|
CHF 1.22
|
|
Min.: 1
Mult.: 1
|
|
|
PCF8574
|
Through Hole
|
PDIP-16
|
I2C, Serial
|
8 I/O
|
With Interrupt
|
2.5 V
|
6 V
|
100 kHz
|
- 40 C
|
+ 85 C
|
Tube
|
1 kV
|
|
|
|
Interface - I/O Expanders 8bit I/O Expndr A 59 5-PCF8574DW A 595-P A 595-PCF8574DW
- PCF8574DWR
- Texas Instruments
-
1:
CHF 1.67
-
15’617On Order
|
Mouser Part No
595-PCF8574DWR
|
Texas Instruments
|
Interface - I/O Expanders 8bit I/O Expndr A 59 5-PCF8574DW A 595-P A 595-PCF8574DW
|
|
15’617On Order
On Order:
7’617 Expected 9/7/2026
8’000 Expected 12/28/2026
Factory Lead Time:
16 Weeks
|
|
|
CHF 1.67
|
|
|
CHF 1.24
|
|
|
CHF 1.12
|
|
|
CHF 1.00
|
|
|
CHF 0.857
|
|
|
View
|
|
|
CHF 0.95
|
|
|
CHF 0.912
|
|
|
CHF 0.872
|
|
|
CHF 0.833
|
|
Min.: 1
Mult.: 1
:
2’000
|
|
|
PCF8574
|
SMD/SMT
|
SOIC-16
|
I2C, Serial
|
8 I/O
|
With Interrupt
|
2.5 V
|
6 V
|
100 kHz
|
- 40 C
|
+ 85 C
|
Reel, Cut Tape, MouseReel
|
1 kV
|
|
|
|
Interface - I/O Expanders Remote 8-Bit I/O Exp ander for I2C-Bus
- PCF8574RGTR
- Texas Instruments
-
1:
CHF 1.56
-
8’203Expected 9/18/2026
|
Mouser Part No
595-PCF8574RGTR
|
Texas Instruments
|
Interface - I/O Expanders Remote 8-Bit I/O Exp ander for I2C-Bus
|
|
8’203Expected 9/18/2026
|
|
|
CHF 1.56
|
|
|
CHF 1.14
|
|
|
CHF 1.04
|
|
|
CHF 0.931
|
|
|
CHF 0.881
|
|
|
CHF 0.742
|
|
Min.: 1
Mult.: 1
:
3’000
|
|
|
PCF8574
|
SMD/SMT
|
VQFN-16
|
I2C, Serial
|
8 I/O
|
With Interrupt
|
2.5 V
|
6 V
|
100 kHz
|
- 40 C
|
+ 85 C
|
Reel, Cut Tape, MouseReel
|
1 kV
|
|
|
|
Interface - I/O Expanders Remote 8-Bit I/O Exp ander for I2C-Bus A ALT 595-PCF8574APWR
- PCF8574APWRE4
- Texas Instruments
-
1:
CHF 1.27
-
Non-Stocked Lead-Time 9 Weeks
|
Mouser Part No
595-PCF8574APWRE4
|
Texas Instruments
|
Interface - I/O Expanders Remote 8-Bit I/O Exp ander for I2C-Bus A ALT 595-PCF8574APWR
|
|
Non-Stocked Lead-Time 9 Weeks
|
|
|
CHF 1.27
|
|
|
CHF 0.931
|
|
|
CHF 0.841
|
|
|
CHF 0.745
|
|
|
CHF 0.654
|
|
|
View
|
|
|
CHF 0.70
|
|
|
CHF 0.672
|
|
|
CHF 0.664
|
|
|
CHF 0.639
|
|
Min.: 1
Mult.: 1
:
2’000
|
|
|
PCF8574A
|
SMD/SMT
|
TSSOP-20
|
|
8 I/O
|
|
2.5 V
|
6 V
|
100 kHz
|
- 40 C
|
+ 85 C
|
Reel, Cut Tape, MouseReel
|
|
|
|
|
Interface - I/O Expanders Remote 8-Bit I/O Exp ander for I2C-Bus A ALT 595-PCF8574APWR
- PCF8574APWRG4
- Texas Instruments
-
1:
CHF 1.27
-
Non-Stocked Lead-Time 9 Weeks
|
Mouser Part No
595-PCF8574APWRG4
|
Texas Instruments
|
Interface - I/O Expanders Remote 8-Bit I/O Exp ander for I2C-Bus A ALT 595-PCF8574APWR
|
|
Non-Stocked Lead-Time 9 Weeks
|
|
|
CHF 1.27
|
|
|
CHF 0.931
|
|
|
CHF 0.841
|
|
|
CHF 0.745
|
|
|
CHF 0.654
|
|
|
View
|
|
|
CHF 0.70
|
|
|
CHF 0.672
|
|
|
CHF 0.664
|
|
|
CHF 0.639
|
|
Min.: 1
Mult.: 1
:
2’000
|
|
|
PCF8574A
|
SMD/SMT
|
TSSOP-20
|
|
8 I/O
|
|
2.5 V
|
6 V
|
100 kHz
|
- 40 C
|
+ 85 C
|
Reel, Cut Tape, MouseReel
|
|
|
|
|
Interface - I/O Expanders Remote 8-Bit I/O Exp ander for I2C-Bus A ALT 595-PCF8574N
- PCF8574NE4
- Texas Instruments
-
1:
CHF 2.40
-
Non-Stocked Lead-Time 9 Weeks
|
Mouser Part No
595-PCF8574NE4
|
Texas Instruments
|
Interface - I/O Expanders Remote 8-Bit I/O Exp ander for I2C-Bus A ALT 595-PCF8574N
|
|
Non-Stocked Lead-Time 9 Weeks
|
|
|
CHF 2.40
|
|
|
CHF 1.84
|
|
|
CHF 1.56
|
|
|
CHF 1.45
|
|
|
View
|
|
|
CHF 1.36
|
|
|
CHF 1.14
|
|
Min.: 1
Mult.: 1
|
|
|
PCF8574
|
Through Hole
|
PDIP-16
|
|
8 I/O
|
|
2.5 V
|
6 V
|
100 kHz
|
- 40 C
|
+ 85 C
|
Tube
|
|
|
Liechtenstein