SN65EPT21 Datasheet, PDF (3/10 Pages) Texas Instruments – 3.3-V Differential PECL/LVDS to TTL Translator

SN65EPT21
www.ti.com
SLLS970 – NOVEMBER 2009
PECL DC CHARACTERISTICS
At V_CC = 3.3 V, GND = 0.0 V (unless otherwise noted)^{(1) (2)}
PARAMETER
TEST CONDITIONS
T_A = –40°C
MIN TYP MAX
T_A = 25°C
MIN TYP MAX
T_A = 85°C
UNIT
MIN TYP MAX
V_IH High-level input voltage,
single-ended
2075
2420 2075
2420 2075
2420 mV
V_IL
Low-leveI input voltage,
single-ended
1355
1675 1355
1675 1355
1675 mV
V_BB
V_IHCM
R
Output reference voltage
High-level input voltage,
common-mode range,
differential
See ⁽³⁾
1910 2009 2160 1910 2034 2160 1910 2026 2160 mV
1.2
3.3 1.2
3.3 1.2
3.3 V
I_IH
High-level input current
I_IL
Low-level input current
-150
150
-150
150
-150
150 μA
μA
(1) The device will meet the specifications after thermal balance has been established when mounted in a socket or printed circuit board
with maintained transverse airflow greater than 500 lfpm. Electrical parameters are assured only over the declared operating
temperature range. Functional operation of the device exceeding these conditions is not implied. Device specification limit values are
applied individually under normal operating conditions and not valid simultaneously.
(2) Input parameters vary 1:1 with V_CC.
(3) V_IHCMR(min) varies 1:1 with GND, V_IHCMR(max) varies 1:1 with V_CC. V_IHCMR range is referenced to the most positive side of the differential
input signal
TTL DC CHARACTERISTICS
At V_CC = 3.3 V, GND = 0.0, T_A = –40°C to 85°C (unless otherwise noted)⁽¹⁾
PARAMETER
TEST CONDITIONS
I_CCH Power supply current
I_CCL Power supply current
V_OH High-level output voltage
V_OL Low-level output voltage
I_OS Output short circuit current
Output is HIGH
Output is LOW
I_OH = –3.0 mA
IOL = 24 mA
MIN
5
8
2.4
–180
TYP
9
7.5
3.05
0.32
–100
MAX
20
26
0.5
–80
UNIT
mA
mA
V
V
mA
(1) The device will meet the specifications after thermal balance has been established when mounted in a socket or printed circuit board
with maintained transverse airflow greater than 500 lfpm. Electrical parameters are assured only over the declared operating
temperature range. Functional operation of the device exceeding these conditions is not implied. Device specification limit values are
applied individually under normal operating conditions and not valid simultaneously.
AC CHARACTERISTICS
At V_CC = 3.0 V to 3.6 V, GND = 0.0 V (unless otherwise noted)^{(1) (2)}
PARAMETER
TEST CONDITIONS
T_A = –40°C
MIN TYP MAX
f_MAX
Maximum switching
300
frequency
(Figure 1–Figure 3)
t_PLH
t_PHL
t_JITTER
t_SKEW
t_SKPP
V_PP
t_r/t_f
Propagation delay
Propagation delay
Random clock jitter (RMS)
Duty Cycle Skew⁽³⁾
Part-to-Part Skew⁽³⁾
Input swing
Output rise/fall times
At 1.5 V
At 1.5 V
See ⁽⁴⁾
Q, Q (0.8V - 2.0V))
1000
1000
150
250
1394 1800
1140 1900
2.25
5
94 250
500
1200
500 900
T_A = 25°C
MIN TYP MAX
300
T_A = 85°C
MIN TYP MAX
300
UNIT
MHz
1000 1444 1800 1000 1481 1800 ps
1000 1280 1900 1000 1421 1900 ps
3.2
5
3.4
5 ps
78 250
62 250 ps
500
500 ps
150
1200 150
1200 mV
250 500 900 250 500 900 ps
(1) The device will meet the specifications after thermal equilibrium has been established when mounted in a test socket or printed circuit
board with maintained transverse airflow greater than 500 lfpm. Electrical parameters are assured only over the declared operating
temperature range. Functional operation of the device exceeding these conditions is not implied. Device specification limit values are
applied individually under normal operating conditions and not valid simultaneously.
(2) R_L = 500 Ω to GND and C_L = 20 pF to GND. See Figure 4. Measured with 750mV, 50% duty cycle clock source
(3) Skews are measured between outputs under identical transitions
(4) V_PP(min) is minimum input swing for which ac parameters are assured.
Copyright © 2009, Texas Instruments Incorporated
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