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PDF RHFLVDS228A Data sheet ( Hoja de datos )
| Número de pieza | RHFLVDS228A | |
| Descripción | dual 4x4 crosspoint switch LVDS | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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RHFLVDS228A
Rad-hard, dual 4x4 crosspoint switch LVDS
Datasheet - production data
• Large input common mode: -4 V to +5 V
• Guaranteed up to 300 krad TID
• SEL immune up to 135 MeV.cm²/mg
• SET/SEU immune up to 22 MeV.cm²/mg
Ceramic Flat-64
The upper metallic lid is
electrically connected to ground.
Features
• LVDS input/output
• Multiple configuration: Mux, repeater and
splitter
• ANSI TIA/EIA-644 compliant
• 400 Mbps LVDS (200 MHz)
• 200 MHz clock channel
• Cold spare on all pins
• Fail-safe function
• 3.3 V operating power supply
• 4.8 V absolute rating
• Hermetic package
• Power consumption: 220 mW at 3.3 V
Description
The RHFLVDS228A is an 8-channel, 4x4
crosspoint switch base, on low voltage differential
signaling (LVDS) for low-power and high-speed
communications. The two 4x4 multiplexers allow
connection from any of the four inputs to any of
the four outputs.
Packaged and qualified for use in aerospace
environments in a low-power, fast-transmission
standard, the RHFLVDS228A operates at 3.3 V
power supply (3.6 V max. operating and 4.8 V
AMR) and a common mode of -4 V to +5 V. The
LVDS outputs operate over a controlled
impedance of 100-ohm transmission media that
may be printed circuit board traces, back planes,
or cables.
The circuit features an internal fail-safe function to
ensure a known state in case of an input short
circuit or a floating input.
All pins have cold spare buffers to ensure they are
in high impedance when VCC is tied to GND. The
RHFLVDS228A can operate over a wide
temperature range of -55 °C to +125 °C and it is
housed in an hermetic Ceramic Flat-64 package.
Table 1. Device summary
Reference
SMD pin Quality level Package Lead finish Mass
RHFLVDS228AK1
RHFLVDS228AK01V(2)
-
TBD
Engineering
model
QML-V flight
Ceramic
Flat-64
Gold
-
1. EPPL = ESA preferred part list
2. Not yet in full production
EPPL(1) Temp. range
-
Target
-55 °C to
125 °C
October 2013
This is information on a product in full production.
DocID025373 Rev 1
1/16
www.st.com
1 page  
RHFLVDS228A
Maximum ratings and operating conditions
3 Maximum ratings and operating conditions
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these conditions is not implied.
Table 4. Absolute maximum ratings
Symbol
Parameter
Value
Unit
VCC
Vi
VCM
Tstg
Tj
Rthjc
ESD
Supply voltage(1)
TTL inputs (operating or cold-spare)
LVDS common mode (operating or cold-spare)
Storage temperature range
Maximum junction temperature
Thermal resistance junction to case(2)
HBM: Human body model
– All pins excepted LVDS inputs and outputs
– LVDS inputs and outputs vs. GND
4.8
-0.3 to 4.8
-5 to +6
-65 to +150
+150
20
2
8
V
°C
°C/W
kV
CDM: Charge device model
500 V
1. All voltages, except the differential I/O bus voltage, are with respect to the network ground terminal.
2. Short-circuits can cause excessive heating. Destructive dissipation can result from short-circuits on the
amplifiers.
Symbol
VCC
VCM
TA
Table 5. Operating conditions
Parameter
Min.
Typ.
Supply voltage
3 3.3
Static common mode
-4
Ambient temperature range
-55
Max.
3.6
+5
+125
Unit
V
°C
DocID025373 Rev 1
5/16
16
5 Page 
RHFLVDS228A
IN0
IN1
SL
OUT
Figure 4. MUX switch timings
Test circuit
Ts TH
IN0
TSw
IN1
Ts TH
IN1
TSw
IN0
Figure 5. Enable and disable waveforms
LVDS
output
OUT+
VOD
OUT-
CL=10pF
50ohm
50ohm
CL=10pF
1.2V
VOS
EN 50%
50%
TPZH
VOUT+ or VOUT-
50%
TPZL
VOUT+ or VOUT-
50%
TPHZ
50%
TPLZ
50%
1. All input pulses are supplied by a generator with the following characteristics on EN:
tr or tf ≤1 ns, F = 500 kHz, pulse width = 500 ns.
DocID025373 Rev 1
11/16
16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet RHFLVDS228A.PDF ] | |
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