SCAN921821 Datasheet, PDF (4/16 Pages) National Semiconductor (TI) – Dual 18-Bit Serializer with Pre-emphasis, IEEE 1149.1(JTAG), and At-Speed BIST

SCAN921821
SNLS173C – SEPTEMBER 2004 – REVISED APRIL 2013
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DC Electrical Characteristics (continued)
Over recommended operating supply and temperature ranges unless otherwise specified.⁽¹⁾⁽²⁾
Symbol
Parameter
Conditions
Min
Typ
Pre-Emphasis Level = 1
1.10
1.24
Pre-Emphasis Level = 2
1.35
1.47
Q_POV
Pre-Emphasis Output
Voltage Ratio
| V_ODPRE / V_OD |
Pre-Emphasis Level = 3
Pre-Emphasis Level = 4
Pre-Emphasis Level = 5
1.55
1.70
1.80
1.91
1.95
2.08
Pre-Emphasis Level = 6
2.10
2.21
Pre-Emphasis Level = 7
2.15
2.30
I_OS
Output Short Circuit
Current
I_OZ
TRI-STATE Output
Current
DO = 0V, Din = H, PWDN and EN = 2.4V
PWDN or EN = 0.8V, DO = 0V ⁽³⁾
PWDN or EN = 0.8V, DO = VDD ⁽³⁾
-10
-25
-10
±1
-55
±6
Power Supply Current (DVDD, PVDD and AVDD Pins)
f = 66 MHz, PRBS-15
Pattern
160
I_DD
Total Supply Current
(includes load current)
C_L = 15pF,
R_L = 100 Ω
f = 66 MHz, Worst Case
Pattern (Checker-Board
180
Pattern)
Total Supply Current
I_DDP
with Pre-Emphasis
(includes load current)
C_L = 15pF,
R_L = 100 Ω
f = 66 MHz, PRBS-15
Pattern
f = 66 MHz, Worst Case
Pattern (Checker-Board
240
280
Pattern)
I_DDX
Supply Current
Powerdown
PWDN = 0.8V, EN = 0.8V
1.0
(3) I_OZ is measured at each pin. The DOUT pin not under test is floated to isolate the TRI-STATE current flow.
Max
Units
1.35
1.55
1.80
1.95
2.20
2.35
2.50
-75
mA
+10
µA
+55
µA
225
mA
mA
mA
325
mA
3.0
mA
Timing Requirements for TCLK
Over recommended operating supply and temperature ranges unless otherwise specified.⁽¹⁾⁽²⁾
Symbol
Parameter
Conditions
Min
Typ
t_TCP
t_TCIH
Transmit Clock Period
Transmit Clock High
Time
15.2
0.4T
T
0.5T
t_TCIL
Transmit Clock Low
Time
0.4T
0.5T
t_CLKT
TCLK Input Transition
Time
3
t_JIT
TCLK Input Jitter
See ⁽³⁾
Max
66.7
0.6T
0.6T
6
80
Units
ns
ns
ns
ns
ps (RMS)
(1) Typical values are given for V_CC = 3.3V and T_A = +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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