hi-3587 Holt Integrated Circuits, Inc., hi-3587 Datasheet - Page 7

• Manufacturer Part Number: hi-3587
• Description: Transmitter With Spi Interface
• Manufacturer: Holt Integrated Circuits, Inc.

TIMING DIAGRAMS (Cont.)
The HI-3587PCI and HI-3587PCT use a 44-pin plastic
chip-scale package. This package has a metal heat sink
pad on its bottom surface. This heat sink is electrically
connected to the die. To enhance thermal dissipation, the
HEAT SINK - CHIP-SCALE PACKAGE ONLY
(AOUT - BOUT)
TXAOUT
TXBOUT
TFLAG (CR14=0)
AOUT
V
BOUT
DIFF
SPI INSTRUCTION 0Eh, (or 12h)
CS
SI
DATA
ARINC BIT
BIT 30
t
TFLG
one level
NULL
t
SDAT
10%
DATA
t
rx
90%
BIT 31
+10V
+5V
-5V
HOLT INTEGRATED CIRCUITS
t
DATA RATE - EXAMPLE PATTERN
NULL
ARINC BIT
DATT
DATA
BIT 1
zero level
t
fx
TRANSMITTING DATA
DATA
10%
HI-3587
BIT 32
90%
t
fx
7
NULL
heat sink can be soldered to matching circuit board pad.
The heat sink may be connected to V+ or left floating.
Do not connect heat sink pad to VDD, GND or V-.
+5V
ARINC BIT
-5V
-10V
DATA
BIT 2
t
rx
null level
WORD GAP
+10V
-5V
+5V
ARINC BIT
BIT 32
DATA
NEXT WORD
BIT 1