PCA9521D,118 NXP Semiconductors, PCA9521D,118 Datasheet - Page 8

• Manufacturer Part Number: PCA9521D,118
• Description: Interface - Signal Buffers, Repeaters
• Manufacturer: NXP Semiconductors
• Series: PCA9521r

Specifications of PCA9521D,118

• Rohs: yes
• Operating Supply Voltage: 2.7 V to 5.5 V
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOP-8
• Input Capacitance: 10 pF
• Maximum Clock Frequency: 1 MHz
• Maximum Operating Frequency: 1000 kHz
• Operating Current: 6 mA
• Power Dissipation: 300 mW
• Product Type: Buffers
• Propagation Delay Time: 45 ns
• Tx/rx Type: I2C, PMBus, SMBus

NXP Semiconductors
10. Application information
PCA9521
Product data sheet
10.1 Design considerations
Figure 10
speed. The PCA9521 has excellent application to extending loads and providing
interfaces to connectors on high-speed microprocessor cards, well in excess of the
Fast-mode 400 kHz I
the buffer with the slowest RC time constant.
Figure 11
different bus voltages without the need for external components. Higher bus voltages and
currents outside the range of the Standard-mode I
providing a longer range capability and higher noise immunity.
The enable pin (EN) can be used to interface buses of different operating frequencies.
When certain bus sections are enabled, the system frequency may be limited by a bus
section having a slave device specified only to 100 kHz. When that bus section is
disabled, the slow slave is isolated and the remaining bus can be run at 400 kHz. The
timing performance and current sinking capability will allow the PCA9521 to run well in
excess of the 400 kHz maximum limit of the Fast-mode I
Fig 10. 1.8 V to 3.3 V level shifting at 1 MHz
(1) Input 33 pF
(2) Output 120 pF
shows a typical application for the PCA9521. The IC can level shift between
shows the PCA9521 level shifting signals from 1.8 V to 3.3 V at 1 MHz clock
All information provided in this document is subject to legal disclaimers.
voltage
(V)
2
−0.5
C-bus specification. Rise times are determined simply by the side of
4.5
3.5
2.5
1.5
0.5
Rev. 2 — 19 March 2013
horizontal scale = 200 ns/div
(1)
(2)
2
C-bus specification can be catered for,
Fast dual bidirectional bus buffer
2
time (ns)
C-bus.
002aaf287
PCA9521
© NXP B.V. 2013. All rights reserved.
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