V385A
8-B
IT
LVDS T
RANSMITTER FOR
V
IDEO
General Description
The V385A transmitter converts 28 bits of 3.3 V
CMOS/TTL into 4 Low Voltage Differential Signaling
(LVDS) data streams while the transmit clock input is
transmitted in parallel with the data streams over a fifth
LVDS link.
Compared to the V385, the V385A provides an
extended clock frequency range of 12-90 MHz, rather
than 20-85 MHz. Other performance improvements
have been incorporated as well.
The V385A can be programmed for rising edge or
falling edge clocks through pin R_FB.
Features
•
Extended clock frequency range of 12 to 90 MHz
•
Convert 28 bits of 3.3 V CMOS/TTL into 4 LVDS
streams
•
Up to 2.52 Gbps throughput or 315 Megabytes/sec
bandwidth
Pin Assignment
VCC
TxIN5
TxIN6
TxIN7
GND
TxIN8
TxIN9
TxIN10
VCC
TxIN11
TxIN12
TxIN13
GND
TxIN14
TxIN15
TxIN16
R_FB
TxIN17
TxIN18
TxIN19
GND
TxIN20
TxIN21
TxIN22
TxIN23
VCC
TxIN24
TxIN25
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
TxIN4
TxIN3
TxIN2
GND
TxIN1
TxIN0
TxIN27
LVDS_GND
TxOUT0-
TxOUT0+
TxOUT1-
TxOUT1+
LVDS_VCC
LVDS_GND
TxOUT2-
TxOUT2+
TxCLKOUT-
TxCLKOUT+
TxOUT3-
TxOUT3+
LVDS_GND
PLL_GND
PLL_VCC
PLL_GND
PWRDWN
TxCLKIN
TxIN26
GND
•
•
•
•
•
•
•
•
•
•
•
Spread spectrum compatible
Supports SD, HD and VGA graphics applications
LVDS voltage swing of 350 mV for low EMI
On-chip PLL requires no external components
Single 3.3 V low-power CMOS design
Operating temperature of -10 to +70°C
Programmable rising or falling edge strobe
Power-down control function
Compatible with TIA/EIA-644 LVDS standards
Packaged in a 56-pin TSSOP (Pb free available)
Pin and function compatible with the National
DS90C385, TI SN65LVDS93 and THine
THC63LVDM83, but with extended clock frequency
and operating temperature range
Block Diagram
Red, Green, Blue
HSYNC
VSYNC
DATA ENABLE
CONTROL
TxOUT2-
R_FB
PWRDWN
CLOCK
PLL
TxCLKOUT-
TxOUT3+
TxOUT3-
TxCLKOUT+
TTL to
LVDS
TxOUT1-
TxOUT2+
24
TxOUT0+
TxOUT0-
TxOUT1+
56-pin TSSOP
V385A Datasheet
1
6/6/07
Revision 1.2
I DT • 2 0 6 4 S i l v e r C r e ek Va l l e y R o a d, S a n J os e , CA 9 5 1 3 8 • t e l ( 8 0 0 ) 3 4 5 - 7 0 1 5 • w w w. i dt . c o m
V385A
8-B
IT
LVDS T
RANSMITTER FOR
V
IDEO
Pin Descriptions
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
Pin Type
Power
CMOS/TTL
CMOS/TTL
CMOS/TTL
Ground
CMOS/TTL
CMOS/TTL
CMOS/TTL
Power
CMOS/TTL
CMOS/TTL
CMOS/TTL
Ground
CMOS/TTL
CMOS/TTL
CMOS/TTL
CMOS/TTL
CMOS/TTL
CMOS/TTL
CMOS/TTL
Ground
CMOS/TTL
CMOS/TTL
CMOS/TTL
CMOS/TTL
Power
CMOS/TTL
CMOS/TTL
Ground
CMOS/TTL
CMOS/TTL
CMOS/TTL
Ground
Power
Ground
Ground
Pin Name
VCC
TxIN5
TxIn6
TxIn7
GND
TxIN8
TxIN9
TxIN10
VCC
TxIN11
TxIN12
TxIN13
GND
TxIN14
TxIN15
TxIN16
R_FB
TxIN17
TxIN18
TxIN19
GND
TxIN20
TxIN21
TxIN22
TxIN23
VCC
TxIN24
TxIN25
GND
TxIN26
TxCLKIN
PWRDWN
PLL_GND
PLL_VCC
PLL_GND
LVDS_GND
Pin Description/Name
3.3V Power
Parallel digital video input pins (TxIN0..27).
Parallel digital video input pins (TxIN0..27).
Parallel digital video input pins (TxIN0..27).
Ground
Parallel digital video input pins (TxIN0..27).
Parallel digital video input pins (TxIN0..27).
Parallel digital video input pins (TxIN0..27).
3.3V Power
Parallel digital video input pins (TxIN0..27).
Parallel digital video input pins (TxIN0..27).
Parallel digital video input pins (TxIN0..27).
Ground
Parallel digital video input pins (TxIN0..27).
Parallel digital video input pins (TxIN0..27).
Parallel digital video input pins (TxIN0..27).
Programmable strobe select input pin (R_FB). High = rising edge; Low =
falling edge.
Parallel digital video input pins (TxIN0..27).
Parallel digital video input pins (TxIN0..27).
Parallel digital video input pins (TxIN0..27).
Ground
Parallel digital video input pins (TxIN0..27).
Parallel digital video input pins (TxIN0..27).
Parallel digital video input pins (TxIN0..27).
Parallel digital video input pins (TxIN0..27).
3.3V Power
Parallel digital video input pins (TxIN0..27).
Parallel digital video input pins (TxIN0..27).
Ground
Parallel digital video input pins (TxIN0..27).
Clock input (TxCLKIN)
Active low. Powerdown tri-states outputs.
Ground
3.3V Power
Ground
Ground
V385A Datasheet
2
6/6/07
Revision 1.2
I DT • 2 0 6 4 S i l v e r C r e ek Va l l e y R o a d, S a n J os e , CA 9 5 1 3 8 • t e l ( 8 0 0 ) 3 4 5 - 7 0 1 5 • w w w. i dt . c o m
V385A
8-B
IT
LVDS T
RANSMITTER FOR
V
IDEO
Pin
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
Pin Type
LVDS
LVDS
LVDS
LVDS
LVDS
LVDS
Ground
Power
LVDS
LVDS
LVDS
LVDS
Ground
CMOS/TTL
CMOS/TTL
CMOS/TTL
Ground
CMOS/TTL
CMOS/TTL
CMOS/TTL
Pin Name
TxOUT3+
TxOUT3-
TxCLKOUT+
TxCLKOUT-
TxOUT2+
TxOUT2-
LVDS_GND
LVDS_VCC
TxOUT1+
TxOUT1-
TxOUT0+
TxOUT0-
LVDS_GND
TxIN27
TxIn0
TxIn1
GND
TxIn2
TxIn3
TxIn4
Pin Description/Name
LVDS output (+)
LVDS output (-)
LVDS output (+)
LVDS output (-)
LVDS output (+)
LVDS output (-)
Ground
3.3V Power
LVDS output (+)
LVDS output (-)
LVDS output (+)
LVDS output (-)
Ground
Parallel digital video input pins (TxIN0..27).
Parallel digital video input pins (TxIN0..27).
Parallel digital video input pins (TxIN0..27).
Ground
Parallel digital video input pins (TxIN0..27).
Parallel digital video input pins (TxIN0..27).
Parallel digital video input pins (TxIN0..27).
External Components
The V385A requires no external components.
V385A Datasheet
3
6/6/07
Revision 1.2
I DT • 2 0 6 4 S i l v e r C r e ek Va l l e y R o a d, S a n J os e , CA 9 5 1 3 8 • t e l ( 8 0 0 ) 3 4 5 - 7 0 1 5 • w w w. i dt . c o m
V385A
8-B
IT
LVDS T
RANSMITTER FOR
V
IDEO
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the V385A. These ratings, which are
standard values for ICS commercially rated parts, are stress ratings only. Functional operation of the device at
these or any other conditions above those indicated in the operational sections of the specifications is not implied.
Exposure to absolute maximum rating conditions for extended periods can affect product reliability. Electrical
parameters are guaranteed only over the recommended operating temperature range.
Item
Supply Voltage, VDD
All Inputs and Outputs
Electrostatic Discharge (EIAJ, 0Ω, 200 pF)
Ambient Operating Temperature
Storage Temperature
Junction Temperature
Maximum Soldering Temperature
-0.3 V to +4 V
-0.3 V to VCC+0.3 V
> 500 V
Rating
-10 to +70°C
-65 to +150°C
150°C
260°C
Recommended Operation Conditions
Parameter
Ambient Operating Temperature
Power Supply Voltage (measured in respect to GND)
Min.
-10
3.0
Typ.
3.3
Max.
+70
3.6
Units
°C
V
Electrical Characteristics
VDD=3.3 V ±10%,
Ambient temperature -10 to +70°C
Parameter
CMOS/TTL DC Specifications
Input High Voltage
Input Low Voltage
Input Current
Power-down Current
LVDS DC Specifications
Differential Output Voltage
Change in V
OD
Between
Complimentary Output States
Common Mode Voltage
Change in V
CM
Between
Complimentary Output States
Output Short Circuit Current
Output Tri-State Current
V
OD
R
L
= 100 ohms
250
345
450
35
1.125
1.250
1.375
35
V
OD
=0V
Power Down#=0V
3.5
±1
5
±10
mV
mV
V
mV
mA
µA
V
IH
V
IL
I
IN
I
PD
GND<VIN<VCC
No switching for input pins
2.00
GND
VCC
0.80
±10
10
V
V
µA
µA
Symbol
Conditions
Min.
Typ.
Max.
Units
Freq.
∆
V
OD
V
CM
∆
V
CM
I
OS
I
OZ
V385A Datasheet
4
6/6/07
Revision 1.2
I DT • 2 0 6 4 S i l v e r C r e ek Va l l e y R o a d, S a n J os e , CA 9 5 1 3 8 • t e l ( 8 0 0 ) 3 4 5 - 7 0 1 5 • w w w. i dt . c o m
V385A
8-B
IT
LVDS T
RANSMITTER FOR
V
IDEO
Parameter
TxCLK IN Transition Time
TxCLK IN Period
TxCLK IN High Time
TxCLK IN Low Time
TxIN Transition Time
LVDS Low-to-High Time
LVDS High-to-Low Time
Transmitter Output Pulse
Position
Symbol
TCIT
TCIP
TCIH
TCIL
TXIT
LLHT
LHLT
TPPos0
TPPos1
TPPos2
TPPos3
TPPos4
TPPos5
TPPos6
Bit0
Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Conditions
Min.
Typ.
Max.
5
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
ns
ns
Freq.
Recommended Transmitter Input Characteristics
11.11
0.35T
0.35T
1.5
0.75
0.75
-0.2
T/7-0.2
2T/7-0.2
3T/7-0.2
4T/7-0.2
5T/7-0.2
6T/7-0.2
2.5
0.5
10
30
0
T/7
2T/7
3T/7
4T/7
5T/7
6T/7
T
0.5T
0.5T
83.333
0.65T
0.65T
6
1.4
1.4
0.2
T/7+0.2
2T/7+0.2
3T/7+0.2
4T/7+0.2
5T/7+0.2
6T/7+0.2
10
Transmitter Switching Characteristics
85 MHz
85 MHz
85 MHz
85 MHz
85 MHz
85 MHz
85 MHz
Transmitter Phase Loop Set
TxIN Setup to TxCLK IN
TxIN Hold to TxCLK IN
TxCLK IN to TxCLK OUT
Delay
TPLLS
TSTC
THTC
TCCD
ns
Thermal Characteristics
Parameter
Thermal Resistance Junction to Ambient
Symbol
θ
JA
θ
JA
θ
JA
Conditions
Still air
1 m/s air flow
3 m/s air flow
Min.
Typ.
84
76
67
50
Max.
Units
°C/W
°C/W
°C/W
°C/W
Thermal Resistance Junction to Case
θ
JC
V385A Datasheet
5
6/6/07
Revision 1.2
I DT • 2 0 6 4 S i l v e r C r e ek Va l l e y R o a d, S a n J os e , CA 9 5 1 3 8 • t e l ( 8 0 0 ) 3 4 5 - 7 0 1 5 • w w w. i dt . c o m
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