HSDL-3603-007 Просмотр технического описания (PDF) - HP => Agilent Technologies
Номер в каталоге
Компоненты Описание
Список матч
HSDL-3603-007 Datasheet PDF : 24 Pages
| |||
I/O Pins Configuration Table
Pin Symbol Description
1 LED A LED Anode
I/O Type
Input
2 LED C LED Cathode Output
3 TXD
Transmit Data Input,
Active High
4 RXD
Receive Data Output,
Active Low
5 SD/Mode Shutdown/ Input,
Mode Select Active High
6 VCC
Supply
Voltage
Supply
Voltage
7 NC
No Connect No Connect
8 GND Ground
Ground
– Shield EMI Shield EMI Shield
Function
This pin can be connected directly to VCC (i.e., without series resistor)
at less than 3 V. Please refer to Table 1 for VCC versus Series Resistor, R1.
Leave this pin unconnected.
This pin is used to transmit serial data when SD/Mode pin is low. If this
pin is held high longer than ~100 µs, the LED would be turned off when
used in conjunction with the SD/Mode pin. TXD is low at initialization.
This pin is capable of driving a standard CMOS or TTL load. No external
pull-up or pull-down resistor is required. It is in tri-state mode when the
transceiver is in shutdown mode and during digital serial programming
operations. RXD is high at initialization.
The transceiver is in shutdown mode if this pin is high for more than
400 µs. On the falling edge of this signal, the state of the TXD pin sampled
and used to set receiver low bandwidth (TXD=low) or high bandwidth
(TXD=high) mode. See Figure 2 for bandwidth selection timings. SD is low
at initialization.
Regulated, 2.7 to 5.25 Volts.
Connect to system ground.
Connect to system ground via a low inductance trace. For best
performance, do not connect directly to the transceiver pin GND.
Recommended Application Circuit Components
Component
Recommended Value
Notes
R1
0 Ω ± 5%, 0.5 Watt, for 2.7 V
1.8 Ω ± 5%, 0.5 Watt, for 3.0 V
4.7 Ω ± 5%, 0.5 Watt, for 3.3 V
6.8 Ω ± 5%, 0.5 Watt, for 3.5 V
CX1
0.47 µF ± 20%, X7R Ceramic
1
CX2
6.8 µF ± 20%, Tantalum
2
Notes:
1. CX1 must be placed within 0.7 cm of the HSDL-3603 to obtain optimum noise immunity.
2. In environments with noisy power supplies, supply rejection performance can be enhanced
by including CX2, as shown in Figure 1: ”HSDL-3603 Functional Block Diagram“ on Page 2.
3
Share Link: 