le75282 Zarlink Semiconductor, le75282 Datasheet
le75282
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le75282 Summary of contents
Page 1
... Form C relays in one economical small package. The Le75282 Dual LCAS device is designed to provide power ringing access to a telephone loop in central office, digital loop carrier, private branch exchange, digitally added main line, and hybrid fiber coax/fiber-in-the-loop analog line card applications ...
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... Current Limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 Temperature Shutdown Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 External Secondary Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 Test Access Switch Protection Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 Typical Performance Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 Physical Dimensions .18 44-Pin TQFP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 Revision .19 Revision .19 Revision .19 Revision .19 Revision .19 2 Zarlink Semiconductor Inc. ...
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... LSSGR, FCC protection requirements. The Le75282 Dual LCAS device provides extremely low idle and active power dissipation and allows use with virtually any range of battery voltage. This makes the Le75282 Dual LCAS device especially appropriate for remote power applications such as DAML or FOC/FITL or other Bellcore TA 909 applications where power dissipation is particularly critical ...
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... Description CH1 CH2 Zarlink Semiconductor Inc. BTEST1 BRINGING1 TSD1 27 FGND1 26 VBH 25 VDD 24 CFG 23 DGND Pin Name Description High-battery voltage. Used as a VBH reference for protection circuit. ...
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... Max –40 –40 150 5 — 260 -0.3 — –85 -0 — 330 — 330 JESD22 Class 1C compliant 0 to 70°C Commercial –40 to +85 °C extended temperature 15 to 85% +4. +5.25 V – – Zarlink Semiconductor Inc. Unit 110 °C ° ° +0 ...
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... ON ∆ Magnitude R SW1 – max ) Iswitch Iswitch Iswitch Iswitch Iswitch Iswitch — 6 Zarlink Semiconductor Inc. Figure 2, on page 12) Min Typ Max — — 1 — — 1 — — 1 — 19 — — — 31 — 14 — — 0.02 1.0 SW2 ON — ...
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... Figure 3, on page 12) Test Condition Measure Iswitch Iswitch Iswitch ∆ IRING- SOURCE — — — Iswitch Iswitch Iswitch — 7 Zarlink Semiconductor Inc. Min Typ Max Unit µA — — 1 µA — — 1 µA — — 1 Ω — 26 110 — ...
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... – Vlogic- 5. – Vlogic- 5. – Vlogic- Zarlink Semiconductor Inc. 13) Measure Min Typ Max Unit Iswitch µA — — 1 Iswitch µA — — 1 Iswitch µA — — 1 ∆ V Ω ...
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... SWITCHING BEHAVIOR When switching from the Ringing state to the Idle/Talk state via simple logic level input control, the Le75282 device is able to provide timing control when the ringing access contacts are released relative to the state of the line break contacts. Make-before-break operation occurs when the line break switch contacts are closed (or made) before the ringing access switch contact is opened (or broken) ...
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... Le75282 device will automatically enter an All Off state and remain in that state until the battery voltage is restored. The Le75282 device is designed such that the device will enter the All Off state if the battery rises above –12 V (typ.) and will remain off until the battery drops below – ...
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... If the magnitude of power is great enough, the external secondary protector could trigger, thereby shunting all current to ground. EXTERNAL SECONDARY PROTECTION An overvoltage secondary protection device on the loop side of the Le75282 device is required. The purpose of this device is to limit fault voltages seen by the Le75282 device so as not to exceed the breakdown voltage or input-output isolation rating of the device ...
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... CURRENT LIMIT (OF BREAK SWITCHES) Switches 1 – 3, Break Switches and Ringing Return Switch LIM1 2 –V –V –1 1.5 V –I LIM1 Figure 3. Switch 4, Ringing Access Switch + –V OS – –I 12 Zarlink Semiconductor Inc LIM2 MAX +V ...
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... Figure 4. Switches 5, 6, Test Access Switches +I I LIMIT –1.5 V 1.5 V – 2 LIMIT CURRENT LIMITING –I 13 Zarlink Semiconductor Inc. CURRENT LIMITING 2 ...
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... Le75282 device. There are numerous ways to control the Le75282 LCAS device using the P1’-P3’/LDx and OFFx inputs. A one-to-one wiring of SLAC P1 to LCAS P1’, SLAC P2 to LCAS P2’, and SLAC P3 to LCAS P3’, is usually not the desired connection. When using the Le79Q224x/Le79228 SLAC as the controller, wiring of the control port varies dependent upon the desired operating states ...
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... I/O pins, the I/O pins can be used to control OFFx. At power-up the I/O pins default to high impedance inputs. The internal pull- down in the OFFx pin will clear the P1’-P3’ inputs and set the Le75282 device into its All Off state at power-up. After the I/O pins are configured as outputs, they can be set high to allow programming of the Le75282 device ...
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... Figure 6. Le75282 Device Application, Idle/Talk State Shown ATEST ARINGING 1 SW3 A Fuse ALINE 1 Ringing Return Secondary Protection B Ringing 1 34 Access BLINE 1 Fuse SW4 1 BRINGING 30 1 BTEST 33 1 VBH ATEST 2 40 ARINGING 2 SW3 Fuse 42 ALINE 2 Secondary Protection BLINE ...
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... RD1, RD2, and RD3 data input values are directed to a given channel when the respective LDx logic signal is set to 0. OFFx is a per-channel control OFFx resets the Le75282 device, the device will remain in the All Off state until OFFx is returned to 1 and the next LDx signal is applied. Table 10. Operating States: CFG = 1 ...
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... The top of package is smaller than the bottom of the package by 0.15mm. 12. This outline conforms to Jedec publication 95 registration MS-026 13. The 160 lead is a compliant depopulation of the 176 lead MS-026 variation BGA. 44-Pin TQFP 18 Zarlink Semiconductor Inc. ...
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... In Electrical Characteristics, changed all ON-resistance and current limit typical values to reflect actual values. • Added Package Assembly, on page 5 Revision • Removed Le75282BVC package option in • Added notes to table in Ordering Information, on page • Diode Bridge, Electrical Specifications table moved to page 8. • ...
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... I C Standard Specification as defined by Philips. Zarlink, ZL, the Zarlink Semiconductor logo are trademarks, and Legerity, the Legerity logo and combinations thereof are registered trademarks of Zarlink Semiconductor Inc. All other trademarks and registered trademarks are the property of their respective owners. © 2007 Zarlink Semiconductor Inc. All Rights Reserved. ...