DS3251/DS3252/DS3253/DS3254
Table 17-F. Transmitter Output Characteristics—DS3 and STS-1 Modes
(VDD = 3.3V M5%, TA = -40°C to +85°C.)
PARAMETER
MIN
TYP
MAX
UNITS
DS3 Output Pulse Amplitude, TLBO = 0 (Note 1)
700
520
700
520
0.9
800
700
800
700
900
800
1100
850
1.1
+5.7
-20
0.05
mVpk
mVpk
mVpk
mVpk
DS3 Output Pulse Amplitude, TLBO = 1 (Note 1)
STS-1 Output Pulse Amplitude, TLBO = 0 (Note 1)
STS-1 Output Pulse Amplitude, TLBO = 1 (Note 1)
Ratio of Positive and Negative Pulse-Peak Amplitudes
DS3 Power Level at 22.368MHz (Note 2)
DS3 Power Level at 44.736MHz vs. Power Level at 22.368MHz (Note 2)
Intrinsic Jitter Generation (Note 3)
Transmit Driver Monitor Minimum Threshold (VTXMIN), TLBO = 0
Transmit Driver Monitor Minimum Threshold (VTXMIN), TLBO = 1
Transmit Driver Monitor Maximum Threshold (VTXMAX), TLBO = 0
Transmit Driver Monitor Maximum Threshold (VTXMAX), TLBO = 1
-1.8
dBm
dB
UIP-P
mVpk
mVpk
mVpk
mVpk
0.02
550
500
1050
800
Note 1:
Note 2:
Note 3:
Measured on the line side (i.e., the BNC connector side) of the 2:1 transmit transformer (Figure 2-1).
Unframed all ones output signal, 3 kHz bandwidth, cable length 225 feet to 450 feet.
Measured with jitter-free clock applied to TCLK and a bandpass jitter filter with 10Hz and 800kHz cutoff frequencies. Not tested
during production test.
Table 17-G. Transmitter Output Characteristics—E3 Mode
(VDD = 3.3V M5%, TA = -40°C to +85°C.)
PARAMETER
Output Pulse Amplitude (Note 1)
MIN
900
TYP
1000 1100
14.55
MAX
UNITS
mVpk
ns
Pulse Width
Ratio of Positive and Negative Pulse Amplitudes (at Centers of Pulses)
Ratio of Positive and Negative Pulse Widths (at Nominal Half Amplitude)
Intrinsic Jitter Generation (Note 2)
Transmit Driver Monitor Minimum Threshold (VTXMIN
Transmit Driver Monitor Maximum Threshold (VTXMAX
0.95
0.95
1.05
1.05
0.02
750
1250
0.05
UIP-P
mVpk
mVpk
)
)
Note 1:
Note 2:
Measured on the line side (i.e., the BNC connector side) of the 2:1 transmit transformer (Figure 2-1).
Measured with jitter-free clock applied to TCLK and a bandpass jitter filter with 10Hz and 800kHz cutoff frequencies. Not tested
during production test.
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DALLAS [ DALLAS SEMICONDUCTOR ]
