ADM2563EBRNZ-RL7

Analog Devices Inc.
3 kV RMS Signal and Power Isolated RS-485 Transceiver with 15 kV IEC ESD Features: 3 kV rms isolated RS-485/RS-422 transceiver Low radiated emissions, integrated, isolated dc-to-dc converter Passes EN 55032 Class B with margin on a 2-layer PCB Cable invert smart feature Correct reversed cable connection on A, B, Y, and Z bus pins while maintaining full receiver fail-safe feature ESD protection on RS-485 A, B, Y and Z pins ≥±12 kV IEC61000-4-2 contact discharge ≥±15 kV IEC61000-4-2 air discharge High speed 25 Mbps data rate (ADM2565E/ADM2567E) Low speed 500 kbps data rate for EMI control (ADM2561E/ADM2563E) Flexible power supplies Input VCC supply of 3 V to 5.5 V Logic VIO supply of 1.7 V to 5.5 V VSEL pin to select VISO supply of 5 V (VCC > 4.5 V) or 3.3 V PROFIBUS compliant for 5 V VISO Wide operating temperature range: −40°C to +105°C High common-mode transient immunity: 250 kV/µs Short-circuit, open-circuit, and floating input receiver fail-safe Supports 196 bus nodes (72 kΩ receiver input impedance) Full hot swap support (glitch free power-up/power-down) Safety and regulatory approvals (pending) CSA Component Acceptance Notice 5A, DIN V VDE V 0884-11, UL 1577, CQC11-471543-2012, IEC 61010-1 Complies with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E) 28-lead, fine pitch SOIC_W package (10.15 mm 10.05 mm) with >8.0 mm creepage and clearance
Distributor SKU Stock MOQ 1 10 50 100 1,000 10,000
DigiKey 505-ADM2563EBRNZ-RL7CT-ND 1198 1 $13.47 $10.61 $9.90 $9.36 $800.00 $1,200.00
Analog Devices Inc ADM2563EBRNZ-RL7 0 $13.62 $12.52 $12.00 $10.57 $10.57 $10.57
Arrow North American Components ADM2563EBRNZ-RL7 0 400
element14 APAC ADM2563EBRNZ-RL7 362 1 * $15.73 * $10.95 * $9.70 * $8.29 * $8.13 * $8.13
Farnell ADM2563EBRNZ-RL7 362 1 * $16.19 * $11.28 * $9.98 * $8.55 * $8.43 * $8.43
Mouser Electronics 584-ADM2563EBRNZ-RL7 714 1 $15.19 $10.94 $10.70 $9.39 $7.95 $7.95
Newark ADM2563EBRNZ-RL7 362 1 $14.69 $10.23 $8.41 $7.84 $7.84 $7.84
Win Source ADM2563EBRNZ-RL7 8156 1

ADM2565EBRNZ

Analog Devices Inc.
3 kV RMS Signal and Power Isolated RS-485 Transceiver with 15 kV IEC ESD Features: 3 kV rms isolated RS-485/RS-422 transceiver Low radiated emissions, integrated, isolated dc-to-dc converter Passes EN 55032 Class B with margin on a 2-layer PCB Cable invert smart feature Correct reversed cable connection on A, B, Y, and Z bus pins while maintaining full receiver fail-safe feature ESD protection on RS-485 A, B, Y and Z pins ≥±12 kV IEC61000-4-2 contact discharge ≥±15 kV IEC61000-4-2 air discharge High speed 25 Mbps data rate (ADM2565E/ADM2567E) Low speed 500 kbps data rate for EMI control (ADM2561E/ADM2563E) Flexible power supplies Input VCC supply of 3 V to 5.5 V Logic VIO supply of 1.7 V to 5.5 V VSEL pin to select VISO supply of 5 V (VCC > 4.5 V) or 3.3 V PROFIBUS compliant for 5 V VISO Wide operating temperature range: −40°C to +105°C High common-mode transient immunity: 250 kV/µs Short-circuit, open-circuit, and floating input receiver fail-safe Supports 196 bus nodes (72 kΩ receiver input impedance) Full hot swap support (glitch free power-up/power-down) Safety and regulatory approvals (pending) CSA Component Acceptance Notice 5A, DIN V VDE V 0884-11, UL 1577, CQC11-471543-2012, IEC 61010-1 Complies with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E) 28-lead, fine pitch SOIC_W package (10.15 mm 10.05 mm) with >8.0 mm creepage and clearance
Distributor SKU Stock MOQ 1 10 50 100 1,000 10,000
DigiKey ADM2565EBRNZ 138 1 $14.24 $9.89 $8.13 $7.47 $7.34 $7.34
Analog Devices Inc ADM2565EBRNZ 0 $13.07 $12.01 $11.51 $10.14 $8.81 $8.81
Arrow North American Components ADM2565EBRNZ 0 46 $7.12 $7.12 $7.04 $7.04
element14 APAC ADM2565EBRNZ 46 1 * $15.96 * $11.09 * $9.12 * $9.12 * $8.06 * $8.06
Farnell ADM2565EBRNZ 46 1 * $15.81 * $12.71 * $10.84 * $10.84 * $7.97 * $7.97
Mouser Electronics ADM2565EBRNZ 352 1 $15.06 $11.45 $9.76 $8.80 $7.63 $7.63
Newark ADM2565EBRNZ 46 1 $14.24 $9.89 $9.01 $8.13 $7.73 $7.73
Win Source ADM2565EBRNZ 1 1

ADM2861EBRNZ-RL7

Analog Devices Inc.
5.7 kV RMS 500kbps Half Duplex Signal and Power Isolated RS-485 Transceiver with 15 kV IEC ESD Features: 5.7 kV rms isolated RS-485/RS-422 transceiver Low radiated emissions, integrated, isolated dc-to-dc converter Passes EN 55032 Class B with margin on a 2-layer PCB Cable invert smart feature Correct reversed cable connection on A, B, Y, and Z bus pins while maintaining full receiver fail-safe feature ESD protection on RS-485 A, B, Y, and Z pins 12 kV IEC61000-4-2 contact discharge 15 kV IEC61000-4-2 air discharge High speed 25 Mbps data rate (ADM2865E/ADM2867E) Low speed 500 kbps data rate for EMI control (ADM2861E/ADM2863E) Flexible power supplies Input VCC supply of 3 V to 5.5 V Logic VIO supply of 1.7 V to 5.5 V VSEL pin to select VISO supply of 5 V (VCC > 4.5 V) or 3.3 V PROFIBUS compliant for 5 V VISO Wide operating temperature range: −40°C to +105°C High common-mode transient immunity: 250 kV/μs Short-circuit, open-circuit, and floating input receiver fail-safe Supports 192 bus nodes (72 k receiver input impedance) Full hot swap support (glitch free power-up/power-down) Safety and regulatory approvals (pending) CSA Component Acceptance Notice 5A, DIN V VDE V 0884-11, UL 1577, CQC11-471543-2012, IEC 61010-1 Complies with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E) 28-lead, fine pitch SOIC_W package (10.15 mm 10.05 mm) with >8.0 mm creepage and clearance
Distributor SKU Stock MOQ 1 10 50 100 1,000 10,000
DigiKey ADM2861EBRNZ-RL7 1347 1 $14.86 $10.35 $9.17 $7.84 $7.76 $7.76
Analog Devices Inc ADM2861EBRNZ-RL7 0 $13.82 $12.70 $12.18 $10.73 $10.73 $10.73
Arrow North American Components ADM2861EBRNZ-RL7 0 400 $10.50 $9.98
element14 APAC ADM2861EBRNZ-RL7 15 10 * $11.60 * $10.28 * $8.79 * $8.44 * $8.44
Farnell ADM2861EBRNZ-RL7 604 1 * $16.29 * $11.36 * $10.06 * $8.60 * $8.51 * $8.51
Mouser Electronics ADM2861EBRNZ-RL7 4251 1 $13.31 $10.35 $9.17 $8.07 $8.07 $8.07
Newark ADM2861EBRNZ-RL7 21 1 $14.86 $10.35 $8.51 $7.95 $7.95 $7.95
Win Source ADM2861EBRNZ-RL7 1 1

ADM2863EBRNZ

Analog Devices Inc.
5.7 kV RMS 500kbps Full Duplex Signal and Power Isolated RS-485 Transceiver with 15 kV IEC ESD Features: 5.7 kV rms isolated RS-485/RS-422 transceiver Low radiated emissions, integrated, isolated dc-to-dc converter Passes EN 55032 Class B with margin on a 2-layer PCB Cable invert smart feature Correct reversed cable connection on A, B, Y, and Z bus pins while maintaining full receiver fail-safe feature ESD protection on RS-485 A, B, Y, and Z pins 12 kV IEC61000-4-2 contact discharge 15 kV IEC61000-4-2 air discharge High speed 25 Mbps data rate (ADM2865E/ADM2867E) Low speed 500 kbps data rate for EMI control (ADM2861E/ADM2863E) Flexible power supplies Input VCC supply of 3 V to 5.5 V Logic VIO supply of 1.7 V to 5.5 V VSEL pin to select VISO supply of 5 V (VCC > 4.5 V) or 3.3 V PROFIBUS compliant for 5 V VISO Wide operating temperature range: −40°C to +105°C High common-mode transient immunity: 250 kV/μs Short-circuit, open-circuit, and floating input receiver fail-safe Supports 192 bus nodes (72 k receiver input impedance) Full hot swap support (glitch free power-up/power-down) Safety and regulatory approvals (pending) CSA Component Acceptance Notice 5A, DIN V VDE V 0884-11, UL 1577, CQC11-471543-2012, IEC 61010-1 Complies with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E) 28-lead, fine pitch SOIC_W package (10.15 mm 10.05 mm) with >8.0 mm creepage and clearance
Distributor SKU Stock MOQ 1 10 50 100 1,000 10,000
DigiKey 505-ADM2863EBRNZ-RL7CT-ND 188 1 $15.52 $12.28 $11.04 $10.94 $800.00 $1,012.00
Analog Devices Inc ADM2863EBRNZ 0 $15.92 $14.63 $14.02 $12.35 $10.99 $10.99
Arrow North American Components ADM2863EBRNZ 0 46 $11.81 $11.75 $11.56 $11.30
element14 APAC ADM2863EBRNZ 49 1 * $18.54 * $13.00 * $10.76 * $10.76 * $9.83 * $9.83
Farnell ADM2863EBRNZ 54 1 * $18.23 * $12.79 * $12.71 * $12.71 * $10.84 * $10.84
Mouser Electronics 584-ADM2863EBRNZ 594 1 $17.24 $13.93 $13.35 $11.76 $10.47 $9.30
Newark ADM2863EBRNZ 49 1 $16.54 $11.60 $11.53 $11.13 $10.72 $10.72

ADM2865EBRNZ-RL7

Analog Devices Inc.
5.7 kV RMS Signal and Power Isolated RS-485 Transceiver with 15 kV IEC ESD Features: 5.7 kV rms isolated RS-485/RS-422 transceiver Low radiated emissions, integrated, isolated dc-to-dc converter Passes EN 55032 Class B with margin on a 2-layer PCB Cable invert smart feature Correct reversed cable connection on A, B, Y, and Z bus pins while maintaining full receiver fail-safe feature ESD protection on RS-485 A, B, Y, and Z pins 12 kV IEC61000-4-2 contact discharge 15 kV IEC61000-4-2 air discharge High speed 25 Mbps data rate (ADM2865E/ADM2867E) Low speed 500 kbps data rate for EMI control (ADM2861E/ADM2863E) Flexible power supplies Input VCC supply of 3 V to 5.5 V Logic VIO supply of 1.7 V to 5.5 V VSEL pin to select VISO supply of 5 V (VCC > 4.5 V) or 3.3 V PROFIBUS compliant for 5 V VISO Wide operating temperature range: −40°C to +105°C High common-mode transient immunity: 250 kV/μs Short-circuit, open-circuit, and floating input receiver fail-safe Supports 192 bus nodes (72 k receiver input impedance) Full hot swap support (glitch free power-up/power-down) Safety and regulatory approvals (pending) CSA Component Acceptance Notice 5A, DIN V VDE V 0884-11, UL 1577, CQC11-471543-2012, IEC 61010-1 Complies with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E) 28-lead, fine pitch SOIC_W package (10.15 mm 10.05 mm) with >8.0 mm creepage and clearance
Distributor SKU Stock MOQ 1 10 50 100 1,000 10,000
DigiKey ADM2865EBRNZ-RL7 351 1 $14.90 $11.78 $11.00 $10.47 $800.00 $800.00
Analog Devices Inc ADM2865EBRNZ-RL7 0 $15.23 $13.99 $13.41 $11.82 $11.82 $11.82
Arrow North American Components ADM2865EBRNZ-RL7 0 400 $11.56 $11.00
element14 APAC ADM2865EBRNZ-RL7 127 1 * $17.12 * $11.98 * $10.64 * $9.15 * $8.98 * $8.98
Farnell ADM2865EBRNZ-RL7 126 1 * $17.62 * $12.33 * $10.96 * $9.42 * $9.23 * $9.23
Mouser Electronics ADM2865EBRNZ-RL7 659 1 $15.57 $12.21 $10.99 $9.62 $9.14 $8.85
Newark ADM2865EBRNZ-RL7 127 1 $15.99 $11.19 $9.24 $8.76 $8.76 $8.76
Verical Marketplace ADM2865EBRNZ-RL7 800 400 $8.46 $8.46

ADM2867EBRNZ-RL7

Analog Devices Inc.
5.7 kV RMS Signal and Power Isolated RS-485 Transceiver with 15 kV IEC ESD Features: 5.7 kV rms isolated RS-485/RS-422 transceiver Low radiated emissions, integrated, isolated dc-to-dc converter Passes EN 55032 Class B with margin on a 2-layer PCB Cable invert smart feature Correct reversed cable connection on A, B, Y, and Z bus pins while maintaining full receiver fail-safe feature ESD protection on RS-485 A, B, Y, and Z pins 12 kV IEC61000-4-2 contact discharge 15 kV IEC61000-4-2 air discharge High speed 25 Mbps data rate (ADM2865E/ADM2867E) Low speed 500 kbps data rate for EMI control (ADM2861E/ADM2863E) Flexible power supplies Input VCC supply of 3 V to 5.5 V Logic VIO supply of 1.7 V to 5.5 V VSEL pin to select VISO supply of 5 V (VCC > 4.5 V) or 3.3 V PROFIBUS compliant for 5 V VISO Wide operating temperature range: −40°C to +105°C High common-mode transient immunity: 250 kV/μs Short-circuit, open-circuit, and floating input receiver fail-safe Supports 192 bus nodes (72 k receiver input impedance) Full hot swap support (glitch free power-up/power-down) Safety and regulatory approvals (pending) CSA Component Acceptance Notice 5A, DIN V VDE V 0884-11, UL 1577, CQC11-471543-2012, IEC 61010-1 Complies with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E) 28-lead, fine pitch SOIC_W package (10.15 mm 10.05 mm) with >8.0 mm creepage and clearance
Distributor SKU Stock MOQ 1 10 50 100 1,000 10,000
DigiKey ADM2867EBRNZ-RL7 8 1 $16.58 $13.16 $12.30 $11.77 $10.48 $10.25
Analog Devices Inc ADM2867EBRNZ-RL7 0 $17.12 $15.73 $15.08 $13.29 $13.29 $13.29
Arrow North American Components ADM2867EBRNZ-RL7 0 400 $13.00 $12.36
element14 APAC ADM2867EBRNZ-RL7 179 1 * $19.59 * $13.79 * $12.28 * $10.78 * $10.57 * $10.57
Farnell ADM2867EBRNZ-RL7 221 1 * $19.41 * $13.66 * $12.17 * $10.69 * $10.68 * $10.68
Mouser Electronics ADM2867EBRNZ-RL7 292 1 $18.45 $13.39 $12.08 $10.61 $9.95 $9.95
Newark ADM2867EBRNZ-RL7 180 1 $17.48 $12.30 $10.34 $9.85 $9.85 $9.85

ADM3051CRZ-REEL7

Analog Devices Inc.
High Speed Industrial CAN Transceiver with Bus Protection for 24 V Systems Features: Physical layer CAN transceiver 5 V operation on VCC Complies with ISO 11898 standard High speed data rates up to 1 Mbps Short-circuit protection on CANH and CANL against shorts to power/ground in 24 V systems Unpowered nodes do not disturb the bus Connect 110 or more nodes on the bus Slope control for reduced EMI Thermal shutdown protection Low current standby mode Industrial operating temperature range (−40°C to +125°C) Available in 8-lead SOIC package
Distributor SKU Stock MOQ 1 10 50 100 1,000 10,000
DigiKey ADM3051CRZ-REEL7 2846 1 $4.42 $2.86 $2.45 $1.99 $1.51 $1.51
Analog Devices Inc ADM3051CRZ-REEL7 0 $3.37 $3.03 $2.86 $2.48 $1.80 $1.80
Arrow North American Components ADM3051CRZ-REEL7 197 1 $0.92 $0.89 $0.85 $0.82 $1.44 $1.44
element14 APAC ADM3051CRZ-REEL7 161 100 * $0.00 * $0.00 * $0.00 * $2.24 * $1.83 * $1.80
Farnell ADM3051CRZ-REEL7 161 100 * $0.00 * $0.00 * $0.00 * $2.03 * $1.67 * $1.67
Mouser Electronics ADM3051CRZ-REEL7 9852 1 $2.53 $2.23 $2.23 $1.92 $1.61 $1.56
Newark ADM3051CRZ-REEL7 161 1 $4.03 $2.72 $2.23 $2.00 $2.00 $2.00
Verical Marketplace ADM3051CRZ-REEL7 197 4 $0.89 $0.85 $0.82 $1.48 $1.48
Win Source ADM3051CRZ-REEL7 68300 9

ADM3061EARZ-R7

Analog Devices Inc.
3.0 V to 5.5 V, 12 kV IEC ESD Protected, Half Duplex 500 kbps RS-485 Transceiver Features: TIA/EIA RS-485 compliant over full supply range 3.0 V to 5.5 V operating voltage range on VCC 1.62 V to 5.5 V VIO logic supply option available ESD protection on the bus pins IEC 61000-4-2 ±12 kV contact discharge IEC 61000-4-2 ≥ ±12 kV air discharge HBM: ≥ ±30 kV Full hot swap support (glitch free power-up/power-down) High speed 50 Mbps data rate (ADM3065E/ADM3066E/ADM3067E/ADM3068E) Low speed 500 kbps data rate for long cables (ADM3061E/ADM3062E/ADM3063E) Full receiver short-circuit, open circuit, and bus idle fail-safe Extended temperature range up to 125°C PROFIBUS compliant at VCC ≥ 4.5 V Half duplex and full duplex models available Allows connection of up to 128 transceivers onto the bus Space-saving package options 10-lead, 3 mm × 3 mm LFCSP 8-lead and 10-lead, 3 mm × 3 mm MSOP 8-lead and 14-lead, narrow body SOIC
Distributor SKU Stock MOQ 1 10 50 100 1,000 10,000
DigiKey ADM3061EARZ-R7 446 1 $3.44 $2.59 $2.37 $2.14 $1.90 $5,000.00
Analog Devices Inc ADM3061EARZ-R7 0 $3.79 $3.41 $3.22 $2.79 $2.03 $2.03
Arrow North American Components ADM3061EARZ-R7 3000 1000 $0.00 $0.00
element14 APAC ADM3061EARZ-R7 1223 100 * $0.00 * $0.00 * $0.00 * $2.47 * $2.03 * $1.99
Farnell ADM3061EARZ-R7 1223 100 * $0.00 * $0.00 * $0.00 * $2.45 * $1.86 * $1.86
Mouser Electronics ADM3061EARZ-R7 1395 1 $3.89 $3.31 $3.31 $2.87 $2.07 $1.81
Newark ADM3061EARZ-R7 1223 1 $4.81 $3.13 $2.45 $2.20 $2.20 $2.20
Verical Marketplace ADM3061EARZ-R7 3000 1000 $1.68 $1.68
Win Source ADM3061EARZ-R7 39500 17

ADM3062EARMZ

Analog Devices Inc.
3.0 V to 5.5 V with VIO, 12 kV IEC ESD Protected, Half Duplex 500 kbps RS-485 Transceiver Features: TIA/EIA RS-485 compliant over full supply range 3.0 V to 5.5 V operating voltage range on VCC 1.62 V to 5.5 V VIO logic supply option available ESD protection on the bus pins IEC 61000-4-2 ±12 kV contact discharge IEC 61000-4-2 ≥ ±12 kV air discharge HBM: ≥ ±30 kV Full hot swap support (glitch free power-up/power-down) High speed 50 Mbps data rate (ADM3065E/ADM3066E/ADM3067E/ADM3068E) Low speed 500 kbps data rate for long cables (ADM3061E/ADM3062E/ADM3063E) Full receiver short-circuit, open circuit, and bus idle fail-safe Extended temperature range up to 125°C PROFIBUS compliant at VCC ≥ 4.5 V Half duplex and full duplex models available Allows connection of up to 128 transceivers onto the bus Space-saving package options 10-lead, 3 mm × 3 mm LFCSP 8-lead and 10-lead, 3 mm × 3 mm MSOP 8-lead and 14-lead, narrow body SOIC
Distributor SKU Stock MOQ 1 10 50 100 1,000 10,000
DigiKey ADM3062EARMZ 820 1 $4.87 $3.17 $50.00 $2.22 $1.71 $1.71
Analog Devices Inc ADM3062EARMZ 0 $3.85 $3.46 $3.27 $2.83 $2.06 $2.06
Arrow Europe ADM3062EARMZ 750 350 $1.71 $1.71
Arrow North American Components ADM3062EARMZ 0 350 $1.64 $1.64
element14 APAC ADM3062EARMZ 54 1 * $5.47 * $3.55 * $2.75 * $2.50 * $2.21 * $2.21
Farnell ADM3062EARMZ 58 1 * $5.40 * $3.52 * $2.72 * $2.45 * $2.18 * $2.18
Mouser Electronics ADM3062EARMZ 3072 1 $3.65 $3.10 $3.10 $2.68 $1.77 $1.77
Newark ADM3062EARMZ 58 1 $4.87 $3.17 $2.44 $2.21 $2.21 $2.21
Verical Marketplace ADM3062EARMZ 8050 350 $1.69 $1.69

ADM3062EBCPZ

Analog Devices Inc.
3.0 V to 5.5 V with VIO, 12 kV IEC ESD Protected, Half Duplex 500 kbps RS-485 Transceiver Features: TIA/EIA RS-485 compliant over full supply range 3.0 V to 5.5 V operating voltage range on VCC 1.62 V to 5.5 V VIO logic supply option available ESD protection on the bus pins IEC 61000-4-2 ±12 kV contact discharge IEC 61000-4-2 ≥ ±12 kV air discharge HBM: ≥ ±30 kV Full hot swap support (glitch free power-up/power-down) High speed 50 Mbps data rate (ADM3065E/ADM3066E/ADM3067E/ADM3068E) Low speed 500 kbps data rate for long cables (ADM3061E/ADM3062E/ADM3063E) Full receiver short-circuit, open circuit, and bus idle fail-safe Extended temperature range up to 125°C PROFIBUS compliant at VCC ≥ 4.5 V Half duplex and full duplex models available Allows connection of up to 128 transceivers onto the bus Space-saving package options 10-lead, 3 mm × 3 mm LFCSP 8-lead and 10-lead, 3 mm × 3 mm MSOP 8-lead and 14-lead, narrow body SOIC
Distributor SKU Stock MOQ 1 10 50 100 1,000 10,000
DigiKey ADM3062EBCPZ 0 1500 $3.62 $2.73 $2.51 $2.26 $2.04 $4,500.00
Analog Devices Inc ADM3062EBCPZ 0 $4.02 $3.61 $3.41 $3.41 $3.41 $3.41
Arrow North American Components ADM3062EBCPZ 0 349 $1.72 $1.72
element14 APAC ADM3062EBCPZ 613 1 $7.28 $4.75 $4.09 $3.34 $3.10 $3.10
Farnell ADM3062EBCPZ 613 1 $3.10 $2.25 $2.04 $1.77 $1.59 $1.59
Mouser Electronics ADM3062EBCPZ 1154 1 $2.96 $2.39 $2.39 $2.38 $1.92 $1.85
Newark ADM3062EBCPZ 613 1 $3.73 $2.71 $2.16 $1.86 $1.86 $1.86
Verical Marketplace ADM3062EBCPZ 3141 349 $1.77 $1.77