Product Information

PCA9508D,118

PCA9508D,118 electronic component of NXP

Datasheet
Interface - Signal Buffers, Repeaters HOTSWAP LVTTL

Manufacturer: NXP
This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges



Price (USD)

1: USD 2.5194 ea
Line Total: USD 2.5194

94 - Global Stock
Ships to you between
Thu. 11 Apr to Tue. 16 Apr
MOQ: 1  Multiples: 1
Pack Size: 1
Availability Price Quantity
94 - Global Stock


Ships to you between
Thu. 11 Apr to Tue. 16 Apr

MOQ : 1
Multiples : 1
1 : USD 2.5194
10 : USD 2.2079
30 : USD 2.0103
100 : USD 1.162
500 : USD 1.0718
1000 : USD 1.031

18990 - Global Stock


Ships to you between Wed. 10 Apr to Fri. 12 Apr

MOQ : 1
Multiples : 1
1 : USD 2.1275
10 : USD 1.8975
100 : USD 1.6905
250 : USD 1.587
500 : USD 1.495
1000 : USD 1.334
2500 : USD 1.334
5000 : USD 1.2995
10000 : USD 1.288

     
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RoHS - XON
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Power Dissipation
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Pd - Power Dissipation
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PCA9508 2 Hot swappable level translating I C-bus repeater Rev. 01 28 April 2008 Product data sheet 1. General description The PCA9508 is a CMOS integrated circuit that supports hot-swap with zero offset and provides level shifting between low voltage (down to 0.9 V) and higher voltage (2.7 V to 2 5.5 V) for I C-bus or SMBus applications. While retaining all the operating modes and 2 features of the I C-bus system during the level shifts, it also permits extension of the 2 I C-bus by providing bidirectional buffering for both the data (SDA) and the clock (SCL) lines, thus enabling two buses of 400 pF. Using the PCA9508 enables the system designer to isolate two halves of a bus for both voltage and capacitance, and perform hot-swap and voltage level translation. Furthermore, the dual supply pins can be powered up in any sequence when any of the supply pins are unpowered, the 5 V tolerant I/O are high-impedance. The hot swap feature allows an I/O card to be inserted into a live backplane without corrupting the data and clock buses. Control circuitry prevents the backplane from being connected to the card until a stop command or bus idle occurs on the backplane without bus contention on the card. Zero offset output voltage allows multiple PCA9508s to be put in series and still maintains an excellent noise margin. PCA9508 has B side and A side bus drivers. The 2.7 V to 5.5 V bus B side drivers behave much like the drivers on the PCA9515A device, while the adjustable voltage bus A side drivers drive more current and incur no static offset voltage. This results in a LOW on the B side translating into a nearly 0 V LOW on the A side. The static offset design of the B side PCA9508 I/O drivers prevents them from being connected to another device that has a rise time accelerator including the PCA9510/A, PCA9511/A, PCA9512/A, PCA9513/A, or PCA9514/A or a static offset voltage including the PCA9507 (B side), PCA9508 (B side), PCA9509 (A side), PCA9515/A, PCA9516A, PCA9517/A (B side), PCA9518, PCA9519 (A side), or P82B96/PCA9600 (Sx/Sy side). The A side of two or more PCA9508s can be connected together, however, to allow a star topology with the A side on the common bus, and the A side can be connected directly to any other buffer with static or dynamic offset voltage. Multiple PCA9508s can be connected in series, A side to B side, with no build-up in offset voltage with only time-of-ight delays to consider. The PCA9508 drivers are not enabled unless the bus is idle, V is above 0.8 V and CC(A) V is above 2.5 V. The EN pin can also be used to turn the drivers on and off under CC(B) system control. Caution should be observed to only change the state of the enable pin when the bus is idle. The output pull-down on the B side internal buffer LOW is set for approximately 0.5 V, while the input threshold of the internal buffer is set about 70 mV lower (0.43 V). When the B side I/O is driven LOW internally, the LOW is not recognized as a LOW by the input.PCA9508 NXP Semiconductors 2 Hot swappable level translating I C-bus repeater This prevents a lock-up condition from occurring. The output pull-down on the A side drives a hard LOW and the input level is set at 0.5V to accommodate the need for a CC(A) lower LOW level in systems where the low voltage side supply voltage is as low as 0.9 V. 2 Table 1 shows the comparison between PCA9508 and I C-bus repeaters. 2 Table 1. PCA9508 and I C-bus repeaters comparison 1 Feature PCA9507 PCA9508 PCA9509 PCA9517A PCA9519 V range (V) 2.7 to 5.5 0.9 to 5.5 1.1 to V - 1 0.9 to 5.5 1.1 to V - 1 CC(A) CC(B) CC(B) V range (V) 2.7 to 5.5 2.7 to 5.5 3.0 to 5.5 2.7 to 5.5 3.0 to 5.5 CC(B) rise time yes - - - - accelerator idle/stop detect - yes - - - for hot-swap normal I/O A side A side B side A side B side static level offset B side B side A side B side A side 1 PCA9517A is the high ESD (6.5 kV HBM and 550 V MM) drop-in replacement for PCA9517. 2. Features n 2 channel, bidirectional buffer isolates capacitance and allows 400 pF on either side of the device n Supports offset-free hot-swap with IDLE/STOP detect circuitry n Voltage level translation from 0.9 V to 5.5 V and from 2.7 V to 5.5 V n Footprint and functional replacement for PCA9515, PCA9515A, PCA9517 and PCA9517A 2 n I C-bus and SMBus compatible n Active HIGH repeater enable input n Static level offset on B side n Open-drain input/outputs n Lock-up free operation n Supports arbitration and clock stretching across the repeater 2 n Accommodates Standard-mode and Fast-mode I C-bus devices and multiple masters 2 n Powered-off high-impedance I C-bus pins n A side operating supply voltage range of 0.9 V to 5.5 V n B side operating supply voltage range of 2.7 V to 5.5 V 2 n 5 V tolerant I C-bus and enable pins n 0 Hz to 400 kHz clock frequency (the maximum system operating frequency may be less than 400 kHz because of the delays added by the repeater). n ESD protection exceeds 6000 V HBM per JESD22-A114, 450 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101 n Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA n Packages offered: SO8 and TSSOP8 PCA9508 1 NXP B.V. 2008. All rights reserved. Product data sheet Rev. 01 28 April 2008 2 of 21

Tariff Desc

8542.39.23 No ..Linear/analogue and peripheral integrated circuits, timers, voltage regulators, A/D and D/A converters, telecommunication and modem integrated circuits, other than board level products Free

Electronic integrated circuits- Processors and controllers, whether or not combined with memories, converters, logic circuits, amplifiers, clock and timing circuits, or other circuits
FR9
Freescale
FREESCALE SEMI
Freescale Semicon
FREESCALE SEMICONDUC
Freescale Semiconductor
Freescale Semiconductor - NXP
NXP
NXP Freescale
NXP (FREESCALE)
NXP / Freescale
NXP SEMI
NXP Semicon
NXP SEMICONDUCTOR
NXP Semiconductors
NXP USA Inc.
PH3
PHI

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