The Datasheet Archive

HSTL15 Datasheets Context Search

Catalog Datasheet MFG & Type PDF Document Tags
LVCMOS25

Abstract: LVCMOS18 LVCMOS33 SSTL18D LVDS25E isplever VHDL SSTL-33 HSTL15 LVCMOS15 TN1102
Text: 9-6 I/O (mA) HSTL15_I / HSTL15D_1 HSTL18_I / HSTL18D_I SSTL25_I / SSTL25D_I SSTL25_II , DRIVE DRIVE (mA) HSTL15_I / HSTL15D_1 4, 8 8 HSTL18_I / HSTL18D_I 8, 12 12 , HSTL15_I HSTL15D_I SSTL33_I, SSTL33_II SSTL33D_I, SSTL33D_II SSTL25_I, SSTL25_II SSTL25D_I, SSTL25D_II , HSTL18 Class I, II 0.9 - HSTL15 Class I 0.75 - SSTL3 Class I, II 1.5 - , SSTL2 Class I, II - - SSTL3 Class I, II - - HSTL15 Class I - -


Original
PDF TN1102 DQS1618PIO1 TN1105 SDSBLVDSLVPECLSSTLHSTL9-19-2LatticeECP2/M LVCMOS33 LVCMOS25 LVCMOS18 LVCMOS15 PR29C; PR48B; LVCMOS25 LVCMOS18 LVCMOS33 SSTL18D LVDS25E isplever VHDL SSTL-33 HSTL15 LVCMOS15
2010 - SSTL-15 class I

Abstract: SSTL-15 JESD8 HSTL-12 JESD815 JESD8-6 SSTL-18 HIV51006-2 EIA-644 JESD86
Text: JESD8-6 (2) (2) 1.8 1.8 2.5 0.90 0.90 HSTL-15 Class I JESD8-6 (2) (2) 1.5 1.5 2.5 0.75 0.75 HSTL-15 Class II JESD8-6 (2) (2) 1.5 - 2.5 , HSTL-15 Class I JESD8-6 (2) (2) 1.5 1.5 2.5 - 0.75 3.0-V PCI-X HardCopy , ) (Pre-Driver Voltage) (Input Ref Voltage) (Board Termination Voltage) Differential HSTL-15 Class , -15 class II, HSTL-15 Class II, HSTL-12 Class II, differential SSTL-15 Class II, differential HSTL-15 Class


Original
PDF HIV51006-2 SSTL-15 class I SSTL-15 JESD8 HSTL-12 JESD815 JESD8-6 SSTL-18 EIA-644 JESD86
2009 - JESD8-16A

Abstract: JESD8-15 ccpd 33 CB JESD86 JESD8-6 EP3SE110F780 SSTL-15 JESD815 JESD8 SSTL-18
Text: HSTL-18 Class II JESD8-6 (2) (2) 1.8 1.8 2.5 0.90 0.90 HSTL-15 Class I JESD8-6 (2) (2) 1.5 1.5 2.5 0.75 0.75 HSTL-15 Class II (3) JESD8-6 (2 , Differential HSTL-15 Class I JESD8-6 (2) (2) 1.5 1.5 2.5 - 0.75 Differential HSTL-15 , -12 Class II output, HSTL-15 Class II output or SSTL-15 Class II output. (4) Column I/O supports PCI/PCI-X , 2C SSTL-15 class II, HSTL-15 Class II, HSTL-12 Class II, differential SSTL-15 Class II


Original
PDF HIII51006-3 EP3SE260--H780 EP3SL340--H1152 JESD8-16A JESD8-15 ccpd 33 CB JESD86 JESD8-6 EP3SE110F780 SSTL-15 JESD815 JESD8 SSTL-18
LVCMOS33

Abstract: LVCMOS25 LVCMOS15 TN1050 SSTL18D HSTL-18 HSTL15
Text: I, III HSTL15_I HSTL15_III HSTL 15 I, III HSTL15D_I HSTL15D_III SSTL 33 I, II , 1.5 1.7 HSTL15 I 1.425 1.5 1.575 0.68 0.75 0.9 HSTL15 III 1.425 1.5 , SSTL18 I SSTL25 I, II SSTL33 I, II SSTL18 I SSTL25 I, II SSTL33 I, II HSTL15 I, III HSTL18 I, II, III HSTL15 I, III HSTL18 I, II, III HSTL15 I, III HSTL18 I, II, III HSTL15 I, III , SSTL18D I, SSTL25D I, II SSTL33D I, II SSTL18D I, SSTL25D I, II SSTL33D I, II HSTL15D I, III


Original
PDF TN1056 DQS16PIO1DDR TN1050LatticeECP/EC PR29C; PR48B; LVCMOS33 LVCMOS25 LVCMOS15 TN1050 SSTL18D HSTL-18 HSTL15
2010 - mini-lvds source driver

Abstract: ep4cgx110 JEDEC FBGA ttl to mini-lvds EP4CE115 484-FBGA 169-FBGA 148QFN EP4CE55 mini-lvds
Text: -2 Class I and II, SSTL-18 Class I and II, HSTL-18 Class I and II, HSTL-15 Class I and II, and HSTL , 25 25 25 - HSTL-15 Class I 8,10,12 8,10,12 50 50 50 50 - HSTL-15 , HSTL-15 (2), (7) 8,10,12 - 50 - 50 - - Differential HSTL-12 (2), (7) 8 , differential SSTL-18 and SSTL-2, differential HSTL-18, HSTL-15 , and HSTL-12 I/O standards are supported only on , standards that supports slew rate option. (7) Differential SSTL-18, differential HSTL-18, HSTL-15 , and HSTL


Original
PDF CYIV-51006-2 mini-lvds source driver ep4cgx110 JEDEC FBGA ttl to mini-lvds EP4CE115 484-FBGA 169-FBGA 148QFN EP4CE55 mini-lvds
2009 - LVCMOS18

Abstract: SSTL-15 LVCMOS25 LVCMOS15 LVCMOS12 LVCMOS33D SSTL15 SSTL15D LVCMOS33 TN1177
Text: HSTL15_I / HSTL15D_I 4, 8 HSTL18_I/ HSTL18D_I 8, 12 SSTL25_I/ SSTL25D_I 8, 12 SSTL25_II , mA HSTL15_I / HSTL15D_I 4, 8 8 HSTL18_I/ HSTL18D_I 8, 12 12 SSTL25_I/ SSTL25D_I , , HTSL18_II HSTL 18 Class I II HSTL18D_I HSTL18D_II HSTL 15 Class I HSTL15_I HSTL 15 Class I HSTL15D_I SSTL 33 Class I II SSTL33_I, SSTL33_II SSTL 33 Class I II SSTL33D_I SSTL3D_II , PCI33 - - HSTL18 Class I, II 0.9 - HSTL15 Class I 0.75 - SSTL33 Class I


Original
PDF TN1177 TN1180 SSTL15 SSTL15 LVCMOS18 SSTL-15 LVCMOS25 LVCMOS15 LVCMOS12 LVCMOS33D SSTL15D LVCMOS33 TN1177
HSTL-12

Abstract: mini-lvds EQFP-144 SSTL-18 EP3C55 EP3C40 EP3C25 EP3C16 EP3C120 EP3C10
Text: and II, HSTL-15 Class I and II, and HSTL-12 Class I and II standards have several levels of current , 12 12 HSTL-15 Class II 16 16 HSTL-18 Class I 8 8 10 10 12 12 HSTL , HSTL-15 Class I SSTL-18 Class II SSTL-2 Class I SSTL-2 Class II 8 8 12 12 16 , HSTL-18 Class I 50 50 HSTL-18 Class II 25 25 HSTL-15 Class I 50 50 HSTL-15 , 50 HSTL-18 Class II 25 25 HSTL-15 Class I 50 50 HSTL-15 Class II 25 25


Original
PDF CIII51007-1 HSTL-12 mini-lvds EQFP-144 SSTL-18 EP3C55 EP3C40 EP3C25 EP3C16 EP3C120 EP3C10
EC1525

Abstract: ROM16x8 LVDS25E LFECP33 LFECP20 LFECP15 LFECP10 LFEC33 LFEC20 LFEC15
Text: III 0.37 0.44 0.52 ns HSTL15_I HSTL_15 I 0.40 0.48 0.56 ns HSTL15_III HSTL_15 III 0.40 0.48 0.56 ns HSTL15D_I HSTL 15 I 0.37 0.44 0.51 ns HSTL15D_III HSTL 15 III 0.37 0.44 0.51 ns SSTL33_I SSTL_3 I 0.46 , HSTL_15 I -0.07 -0.08 -0.09 ns HSTL15_II HSTL_15 II 0.00 0.00 0.00 ns HSTL15_III HSTL_15 III -0.05 -0.06 -0.07 ns HSTL15D_I HSTL 15 I -0.07 -0.08


Original
PDF 18Kbits535Kbits 131Kbit DDR333 166MHz) SSTL18I HSTL15I, 14PLL IEEE1149 LFEC10/ LFEC15/ EC1525 ROM16x8 LVDS25E LFECP33 LFECP20 LFECP15 LFECP10 LFEC33 LFEC20 LFEC15
2009 - LVCMOS33

Abstract: LVCMOS25 LVCMOS15 ECP2M LVCMOS18 R1C7
Text: I/O 2mA 4mA 6mA8mA12mA16mA 20mA I/O bank 6 6. I/O mA HSTL15_I / HSTL15D_I 4 , HSTL15_I / HSTL15D_I 4, 8 8 HSTL18_I/ HSTL18D_I 8, 12 12 SSTL25_I/ SSTL25D_I 8, 12 8 , , HTSL18_II HSTL 18 Class I II HSTL18D_I, HSTL18D_II HSTL 15 Class I HSTL15_I HSTL 15 Class I HSTL15D_I SSTL 33 Class I II SSTL33_I, SSTL33_II SSTL 33 Class I II SSTL33D_I , HSTL15 Class I 0.75 - SSTL3 Class I, II 1.5 - SSTL2 Class I, II 1.25 -


Original
PDF TN1102 TN1105 PR29C; PR48B; LVCMOS33 LVCMOS25 LVCMOS15 ECP2M LVCMOS18 R1C7
2010 - EP4CE15

Abstract: EP4CE6 eqfp DIODE CQ 618 EP4CE115 EP4CE75 EP4CE40 ep4cgx110 ttl to mini-lvds HSTL standards mini-lvds source driver
Text: -2 Class I and II, SSTL-18 Class I and II, HSTL-18 Class I and II, HSTL-15 Class I and II, and HSTL , 25 25 25 - HSTL-15 Class I 8,10,12 8,10,12 50 50 50 50 - HSTL-15 , HSTL-15 (2), (7) 8,10,12 - 50 - 50 - - Differential HSTL-12 (2), (7) 8 , differential SSTL-18 and SSTL-2, differential HSTL-18, HSTL-15 , and HSTL-12 I/O standards are supported only on , standards that supports slew rate option. (7) Differential SSTL-18, differential HSTL-18, HSTL-15 , and HSTL


Original
PDF CYIV-51006-2 EP4CE15 EP4CE6 eqfp DIODE CQ 618 EP4CE115 EP4CE75 EP4CE40 ep4cgx110 ttl to mini-lvds HSTL standards mini-lvds source driver
LVPECL25

Abstract: HSTL-18 LVDS-25 LVCMOS25 RSDS25 CSG484 MiniLVDS25 FGG484 FGG400 HSTL18
Text: , LVCMOS12, GTL, GTL+, HSTL15 Class I, HSTL15 Class III, HSTL18 Class I, HSTL18 Class II, HSTL18 Class III , , LVCMOS25, LVCMOS18, LVCMOS15, LVCMOS12, HSTL15 Class I, HSTL15 Class III, HSTL18 Class I, HSTL18 Class II


Original
PDF XA2S100E XA2S150E XA2S200E XA2S300E XA3S50 XA3S200 XA3S400 XA3S1000 XA3S1500 XA3S100E LVPECL25 HSTL-18 LVDS-25 LVCMOS25 RSDS25 CSG484 MiniLVDS25 FGG484 FGG400 HSTL18
SSTL-15

Abstract: SSTL15 DDR3 SSTL class resistor bank EIA-644 SSTL-18 EP3SE50 SSTL-15 class I
Text: HSTL-18 Class I QDRII/RLDRAM II HSTL-18 CLass II QDRII/RLDRAM II HSTL-15 Class I QDRII/QDRII+/RLDRAM II HSTL-15 Class II QDRII/QDRII+/RLDRAM II HSTL-12 Class I Memory interface , Differential HSTL-15 Class I Clock interfaces Differential HSTL-15 Class II Clock interfaces , 0.90 0.90 HSTL-18 Class II JESD8-6 1.8 1.8 1.8 1.8 2.5 0.90 0.90 HSTL-15 Class I JESD8-6 1.5 1.5 1.5 1.5 2.5 0.75 0.75 HSTL-15 Class II JESD8


Original
PDF SIII51007-1 SSTL-15 SSTL15 DDR3 SSTL class resistor bank EIA-644 SSTL-18 EP3SE50 SSTL-15 class I
2010 - resistor bank

Abstract: JESD8-15 TI 7C mini-lvds source driver EIA-644 SSTL-15 SSTL-18
Text: and II QDRII/RLDRAM II HSTL-15 Class I and II QDRII/QDRII+/RLDRAM II HSTL-12 Class I and , -18 Class I and II Clock interfaces Differential HSTL-15 Class I and II Clock interfaces Stratix , ) HSTL-15 Class I JESD8-6 (2) (2) 1.5 1.5 2.5 0.75 0.75 HSTL-15 Class II , 1.8 2.5 - 0.90 Differential HSTL-15 Class I JESD8-6 (2) (2) 1.5 1.5 2.5 - 0.75 Differential HSTL-15 Class II JESD8-6 (2) (2) 1.5 - 2.5 -


Original
PDF SIV51006-3 resistor bank JESD8-15 TI 7C mini-lvds source driver EIA-644 SSTL-15 SSTL-18
ttl to mini-lvds

Abstract: point-to-point mini-lvds mini-lvds connector cyclone ii HSTL18 mini-lvds SSTL-18 EP2C50 EP2C35 CII51011-2
Text: , HSTL-18 Class II, & HSTL-15 Class II I/O Standards I/O Bank 2 I/O Bank 1 Also Supports the 3.3 , SSTL-18 Class I HSTL-18 Class I HSTL-15 Class I Differential SSTL-2 (2) Differential SSTL-18 (2) Differential HSTL-18 (3) Differential HSTL-15 (3) I/O Bank 3 Also Supports the 3.3-V PCI & PCI-X I/O , II, HSTL-18 Class II, & HSTL-15 Class II I/O Standards Notes to Figure 11­1: (1) (2) (3 , -18 Class II, HSTL-18 Class II, & HSTL-15 Class II I/O Standards I/O Bank 3 I/O Bank 4 Individual


Original
PDF CII51011-2 TIA/EIA-644 ttl to mini-lvds point-to-point mini-lvds mini-lvds connector cyclone ii HSTL18 mini-lvds SSTL-18 EP2C50 EP2C35
EQFP-144

Abstract: mini-lvds source driver EP3C55 EP3C40 EP3C25 EP3C16 EP3C120 EP3C10 SSTL-18 EP3C25 pin diagram
Text: and II, HSTL-15 Class I and II, and HSTL-12 Class I and II standards have several levels of current , 12 12 HSTL-15 Class II 16 16 HSTL-18 Class I 8 8 10 10 12 12 HSTL , HSTL-15 Class I SSTL-18 Class II SSTL-2 Class I SSTL-2 Class II 8 8 12 12 16 , HSTL-18 Class I 50 50 HSTL-18 Class II 25 25 HSTL-15 Class I 50 50 HSTL-15 , 50 HSTL-18 Class II 25 25 HSTL-15 Class I 50 50 HSTL-15 Class II 25 25


Original
PDF
2007 - TWLA500

Abstract: Frequency Generator 1MHz LA500 HSTL-18
Text: , threshold accuracy 25 mV LVDS, PECL, LVPECL SSTL3, SSTL2, HSTL15 , HSTL18 LVCMOS 3.3/2.5 , SSTL18 class I -0.3 VREF - 0.125 VREF + 0.125 3.6 HSTL15 class I -0.3 VREF - 0.1 VREF + 0.1 3.6 HSTL15 class III -0.3 VREF - 0.1 VREF + 0.1 3.6 HSTL18 class I


Original
PDF TWLA500 HSTL15 HSTL18 TWLA500 Frequency Generator 1MHz LA500 HSTL-18
2009 - EQFP-144

Abstract: FBGA-484 datasheet mini-lvds source driver EP3C10 EP3C16 SSTL-18 JTAG series termination resistors HSTL-12
Text: . The LVTTL, LVCMOS, SSTL-2 Class I and II, SSTL-18 Class I and II, HSTL-18 Class I and II, HSTL-15 , -12 Class II 14 - HSTL-15 Class I 8, 10, 12 8, 10, 12 HSTL-15 Class II 16 16 , 50 50 50 HSTL-18 Class II 25 25 25 25 HSTL-15 Class I 50 50 50 50 HSTL-15 Class II 25 25 25 25 HSTL-12 Class I 50 50 50 50 HSTL-12 Class II , v v v HSTL-15 Class I, HSTL-15 Class II Voltage referenced JESD8-6 1.5 1.5


Original
PDF CIII51007-3 EQFP-144 FBGA-484 datasheet mini-lvds source driver EP3C10 EP3C16 SSTL-18 JTAG series termination resistors HSTL-12
2007 - AF27

Abstract: CCII APPLICATION
Text: 6 and Figure 7 show the signal margin difference between HSTL15 CII 16 mA and HSTL18 CII 16 mA for , is similar for both HSTL15 CII 16 mA and HSTL18 CII 16 mA interfaces. The signal margin high for quiet high noise is greater for HSTL15 (52.7%) compared to the HSTL18 (45.2%) interface, though the noise numbers in absolute millivolts is higher for HSTL18 (190 mV) interface compared to HSTL15 (173 mV , Between HSTL18CII 16 mA and HSTL15 CII 16 mA Signal Margin Low Comparison between HSTL18 CII 16 mA Vs


Original
PDF
2010 - SSTL-15

Abstract: EIA-644 EP3SL70 mini-lvds SSTL-18
Text: /RLDRAM II HSTL-15 Class I QDR II/QDR II+/RLDRAM II HSTL-15 Class II QDR II/QDR II+/RLDRAM II , -18 Class I Clock interfaces Differential HSTL-18 Class II Clock interfaces Differential HSTL-15 Class I Clock interfaces Differential HSTL-15 Class II Clock interfaces Differential HSTL , -18 Class II JESD8-6 (2) (2) 1.8 1.8 2.5 0.90 0.90 HSTL-15 Class I JESD8-6 (2) (2) 1.5 1.5 2.5 0.75 0.75 HSTL-15 Class II JESD8-6 (2) (2) 1.5


Original
PDF SIII51007-1 SSTL-15 EIA-644 EP3SL70 mini-lvds SSTL-18
2010 - 74 series family

Abstract: EP3C10 EP3CLS200 mini-lvds driver receiver altLVDS mini-lvds source driver EQFP-144 EP3CLS70 BGA and eQFP Package EP3C16M164
Text: . The LVTTL, LVCMOS, SSTL-2 Class I and II, SSTL-18 Class I and II, HSTL-18 Class I and II, HSTL-15 , -12 Class II 14 - HSTL-15 Class I 8, 10, 12 8, 10, 12 HSTL-15 Class II 16 16 , 50 50 50 HSTL-18 Class II 25 25 25 25 HSTL-15 Class I 50 50 50 50 HSTL-15 Class II 25 25 25 25 HSTL-12 Class I 50 50 50 50 HSTL-12 Class II , v v v v v HSTL-15 Class I, HSTL-15 Class II Voltage referenced JESD8-6 1.5


Original
PDF
ttl to mini-lvds

Abstract: mini-lvds connector point-to-point mini-lvds mini-lvds EQFP-144 cyclone iii EP3C10 EP3C25 EP3C40 EP3C120F780
Text: (3) SSTL-2 class I and II SSTL-18 CLass I and II HSTL-18 Class I and II HSTL-15 Class I and II , ) DIfferential HSTL-15 (4) Differential HSTL-12 (4) I/O Bank 4 I/O banks 3 & 4 also support the HSTL , . The differential SSTL-2, SSTL-18, HSTL-18, HSTL-15 , and HSTL-12 I/O standards are only supported on , interface type of differential SSTL-18, HSTL-18, HSTL-15 , and HSTL-12 I/O standards. 8­2 Cyclone III , Differential HSTL-18 (3) All NA NA 200 200 Differential HSTL-15 (3) All NA NA 200


Original
PDF CIII51008-1 ttl to mini-lvds mini-lvds connector point-to-point mini-lvds mini-lvds EQFP-144 cyclone iii EP3C10 EP3C25 EP3C40 EP3C120F780
2009 - LVCMOS15

Abstract: LVCMOS25 LVCMOS33 PCI33 HSTL15 TN1136
Text: HSTL15_I Differential HSTL 15 Class I HSTL15D_I SSTL 33 Class I and II SSTL33_I, SSTL33_II , Guide Table 8-9. DRIVE Settings Output Standard DRIVE (mA) Default (mA) HSTL15_I / HSTL15D_I , for Single-ended Buffers Single Ended I/O Standard Programmable Drive (mA) HSTL15_I 4, 8 , Drive (mA) HSTL15D_I 4, 8 HSTL18D_I 8, 12 SSTL25D_I 8, 12 SSTL25D_II 16, 20 , 33 - 3.3 HSTL18 Class I, II 0.9 - HSTL15 Class I 0.75 - SSTL3 Class I


Original
PDF TN1136 PR29C; PR48B; SSTL18 LVCMOS15 LVCMOS25 LVCMOS33 PCI33 HSTL15 TN1136
2010 - LVCMOS15

Abstract: LVCMOS25 LVCMOS33 PCI33 SSTL18II
Text: HSTL15_I Differential HSTL 15 Class I HSTL15D_I SSTL 33 Class I and II SSTL33_I, SSTL33_II , Guide Table 8-9. DRIVE Settings Output Standard DRIVE (mA) Default (mA) HSTL15_I / HSTL15D_I , for Single-ended Buffers Single Ended I/O Standard Programmable Drive (mA) HSTL15_I 4, 8 , Drive (mA) HSTL15D_I 4, 8 HSTL18D_I 8, 12 SSTL25D_I 8, 12 SSTL25D_II 16, 20 , - 1.5 LVCMOS12 - - PCI 33 - 3.3 HSTL18 Class I, II 0.9 - HSTL15


Original
PDF TN1136 LVCMOS15 LVCMOS25 LVCMOS33 PCI33 SSTL18II
2009 - point-to-point mini-lvds

Abstract: ttl to mini-lvds EP3CLS200 EP3CLS150 EP3CLS100 mini-lvds connector EP3C40 mini lvds mini-lvds mini-lvds source driver
Text: ) SSTL-2 Class I and II SSTL-18 Class I and II HSTL-18 Class I and II HSTL-15 Class I and II HSTL-12 Class I Differential SSTL-2 (4) Differential SSTL-18 (4) Differential HSTL-18 (4) DIfferential HSTL-15 , differential SSTL-2, SSTL-18, HSTL-18, HSTL-15 , and HSTL-12 I/O standards are only supported on dedicated clock , differential SSTL-18, HSTL-18, HSTL-15 , and HSTL-12 I/O standards. (5) BLVDS output uses two single-ended , NA Yes Yes Differential HSTL-18 (3) All NA Yes Yes Differential HSTL-15 (3


Original
PDF CIII51008-3 point-to-point mini-lvds ttl to mini-lvds EP3CLS200 EP3CLS150 EP3CLS100 mini-lvds connector EP3C40 mini lvds mini-lvds mini-lvds source driver
xc3s500e fg320

Abstract: xc3s1800a fgg 484 XC3S50A/AN VQ100 XC3S250E vqg100 XC3S400 PQ208 SPARTAN-3 XC3S400 pq208 architecture xc3s1600e fg320 CPG196 LVCMOS33
Text: Configuration LVTTL, LVCMOS33, LVCMOS25, LVCMOS18, LVCMOS15, LVCMOS12, HSTL15 Class I, HSTL15 Class III , , LVCMOS25, LVCMOS18, LVCMOS15, LVCMOS12, GTL, GTL+, HSTL15 Class I, HSTL15 Class III, HSTL18 Class I


Original
PDF XC6SLX16 XC6SLX25 XC6SLX45 XC6SLX75 XC6SLX100 XC6SLX150 XC6SLX25T XC6SLX45T XC6SLX75T XC6SLX100T xc3s500e fg320 xc3s1800a fgg 484 XC3S50A/AN VQ100 XC3S250E vqg100 XC3S400 PQ208 SPARTAN-3 XC3S400 pq208 architecture xc3s1600e fg320 CPG196 LVCMOS33
Supplyframe Tracking Pixel