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SCAN921821 Datasheet(PDF) 4 Page - Texas Instruments

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Part # SCAN921821
Description  SCAN921821 Dual 18-Bit Serializer with Pre-emphasis, IEEE 1149.1 (JTAG), and At-Speed
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

SCAN921821 Datasheet(HTML) 4 Page - Texas Instruments

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SCAN921821
SNLS173C – SEPTEMBER 2004 – REVISED APRIL 2013
www.ti.com
DC Electrical Characteristics (continued)
Over recommended operating supply and temperature ranges unless otherwise specified.
(1)(2)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Pre-Emphasis Level = 1
1.10
1.24
1.35
Pre-Emphasis Level = 2
1.35
1.47
1.55
Pre-Emphasis Level = 3
1.55
1.70
1.80
Pre-Emphasis Output
QPOV
Voltage Ratio
Pre-Emphasis Level = 4
1.80
1.91
1.95
| VODPRE / VOD |
Pre-Emphasis Level = 5
1.95
2.08
2.20
Pre-Emphasis Level = 6
2.10
2.21
2.35
Pre-Emphasis Level = 7
2.15
2.30
2.50
Output Short Circuit
IOS
DO = 0V, Din = H, PWDN and EN = 2.4V
-10
-25
-75
mA
Current
PWDN or EN = 0.8V, DO = 0V (3)
-10
± 1
+10
µA
TRI-STATE Output
IOZ
Current
PWDN or EN = 0.8V, DO = VDD (3)
-55
± 6
+55
µA
Power Supply Current (DVDD, PVDD and AVDD Pins)
f = 66 MHz, PRBS-15
160
225
mA
Pattern
Total Supply Current
CL = 15pF,
IDD
f = 66 MHz, Worst Case
(includes load current)
RL = 100 Ω
Pattern (Checker-Board
180
mA
Pattern)
f = 66 MHz, PRBS-15
240
mA
Pattern
Total Supply Current
CL = 15pF,
IDDP
with Pre-Emphasis
f = 66 MHz, Worst Case
RL = 100 Ω
(includes load current)
Pattern (Checker-Board
280
325
mA
Pattern)
Supply Current
IDDX
PWDN = 0.8V, EN = 0.8V
1.0
3.0
mA
Powerdown
(3)
IOZ is measured at each pin. The DOUT pin not under test is floated to isolate the TRI-STATE current flow.
Timing Requirements for TCLK
Over recommended operating supply and temperature ranges unless otherwise specified.
(1) (2)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
tTCP
Transmit Clock Period
15.2
T
66.7
ns
Transmit Clock High
tTCIH
0.4T
0.5T
0.6T
ns
Time
Transmit Clock Low
tTCIL
0.4T
0.5T
0.6T
ns
Time
TCLK Input Transition
tCLKT
3
6
ns
Time
tJIT
TCLK Input Jitter
See (3)
80
ps (RMS)
(1)
Typical values are given for VCC = 3.3V and TA = +25°C.
(2)
Current into device pins is defined as positive. Current out of device pins is defined as negative. Voltages are referenced to ground
except VOD,
ΔVOD, VTH and VTL which are differential voltages.
(3)
Specified by design using statistical analysis.
4
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