Rainbow Electronics MAX9258 - Manual (Page 5)

MAX9257/MAX9258
_______________________________________________________________________________________ 5
Fully Programmable Serializer/Deserializer
with UART/I
2
C Control Channel
MAX9257 AC ELECTRICAL CHARACTERISTICS
(V CC_ = +3.0V to +3.6V, R L = 50Ω ±1%, T A = -40°C to +105°C, unless otherwise noted. Typical values are at V CC_ = +3.3V,
T A = +25°C.) (Notes 5, 9)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
PCLK_IN TIMING REQUIREMENTS
Clock Period t T 14.28 200.00 ns
Clock Frequency f CLK 1/t T 5 70 MHz
Clock Duty Cycle DC t HIGH /t T or t LOW /t T 35 50 65 %
Clock Transition Time t R , t F (Figure 7) 4 ns
SWITCHING CHARACTERISTICS
LVDS Output Rise Time t R 20% to 80% (Figure 4) 315 370 ps
LVDS Output Fall Time t F 20% to 80% (Figure 4) 315 370 ps
t
R1A ,
t
F1A
642 970 1390
t R2 , t F2 810 1140 1420
Control Transceiver Transition
Time
t R1B , t F1B
20% to 80% (Figure 16)
290 386 490
ps
Input Setup Time t S (Figure 5) 0 ns
Input Hold Time t H (Figure 5) 3 ns
t PSD1 Spread off (Figure 6)
(4.55 x t T) +
11
Parallel-to-Serial Delay
t PSD2 ±4% spread
( 36.55 x t T) +
11
ns
PLL Lock Time t LOCK Combined FPLL and SPLL; PCLK_IN stable
32,768 x
t T
ns
Random Jitter t RJ
420MHz LVDS output, spread off,
FPLL = bypassed
12
ps
(RMS)
Deterministic Jitter t DJ
2 18 - 1 PRBS, SRATE = 840Mbps, 18 bits,
no spread
142 ps (p-p)
SCL/TX, SDA/RX
R PULLUP = 10k Ω 400
Rise Time t RS
0.3 x V CC to 0.7 x
V CC , C L = 30pF R PULLUP = 1.6k Ω 60
ns
Fall Time t
FS
0.7 x V
CC
to 0.3 x V
CC,
C
L
= 30pF 40 ns
95kbps to 400kbps 100
400kbps to 1000kbps 50
1000kbps to 4250kbps 10
Pulse Width of Spike Suppressed
in SDA
t SPK
DC to 10Mbps (bypass mode) 10
ns
400kbps 100
Data Setup Time t SETUP
4.25Mbps, C L = 10pF 60
ns
400kbps 100
Data Hold Time t HOLD
4.25Mbps, C
L
= 10pF 0
ns
I 2 C TIMING (Note 8)
Maximum SCL Clock Frequency f SCL 4.25 MHz
Minimum SCL Clock Frequency f SCL 95 kHz
Start Condition Hold Time t HD:STA (Figure 30) 0.6 µs