SN65EL11: 5-V PECL/ECL 1:2 Fanout Buffer
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更新于2024-08-04
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"TI-SN65EL11是一款由德州仪器（TI）推出的1:2 PECL/ECL扇出缓冲器，适用于高速数据和时钟传输，具有低延迟和小输出延迟差特性。该器件设计用于在输入开路条件下仍能保持确定性的输出电平，并且与MC10EL11、MC100EL11等老款器件兼容，支持5-V PECL和负电压NECL工作模式。"
SN65EL11是一款高性能的集成电路，主要功能是将差分PECL（Positive Emitter-Coupled Logic）或ECL（Emitter-Coupled Logic）信号进行1:2的扇出，以驱动更多的负载。该器件的主要特点包括：
1. **1:2扇出功能**：SN65EL11可以将一个输入信号放大并同时提供两个输出，这在需要向多个设备分配高速信号的系统中非常有用。
2. **宽工作电压范围**：对于PECL模式，供电电压VCC应在4.2V至5.7V之间，VEE保持在0V；而对于NECL模式，VCC为0V，VEE的范围在-4.2V到-5.7V之间。
3. **极低的输出延迟差**：该器件的输出延迟差仅为5ps，确保了高精度的时序性能，适合处理超过2.5GHz频率的高速信号。
4. **265-ps典型传播延迟**：这意味着SN65EL11在信号传递过程中具有快速响应，这对于高速数据传输至关重要。
5. **开放输入条件下的确定性输出**：即使输入处于开路状态，内置的温度补偿和输入下拉电阻也能保证设备输出稳定，避免逻辑混乱。
6. **封装选项**：SN65EL11采用8引脚SOIC和TSSOP封装，方便在各种设计中集成。
7. **信号级转换**：该器件可以用于不同信号标准之间的转换，如在PECL和ECL系统间进行通信。
8. **内置功能**：包括输入下拉电阻，用于在输入未连接时维持逻辑状态，以及温度补偿，确保在不同环境温度下性能的稳定性。
9. **兼容性**：SN65EL11与MC10EL11和MC100EL11等早期产品兼容，方便升级和替换。
在实际应用中，例如在数据和时钟传输跨越背板或需要信号级转换的场景，SN65EL11能够发挥其优势。在设计电路时，应考虑其电压范围、延迟特性和扇出能力，以确保系统的可靠性和高速性能。此外，订购该器件时，应注意选择合适的封装类型和供应商信息。
PECL DC CHARACTERISTICS
(1)
(V
CC
= 5 V; V
EE
= 0 V)
(2)
NECL DC CHARACTERISTICS
(1)
(V
CC
= 0 V; V
EE
= 5 V)
(2)
SN65EL11
www.ti.com
............................................................................................................................................................................................ SLLS920 – DECEMBER 2008
– 40 ° C 25 ° C 85 ° C
PARAMETER UNIT
MIN TYP MAX MIN TYP MAX MIN TYP MAX
I
CC
Power-supply current 18 26 21 26 23 26 mA
V
OH
Output HIGH voltage
(3)
3915 4120 3915 4000 4120 3915 4120 mV
V
OL
Output LOW voltage
(3)
3170 3380 3170 3288 3380 3170 3380 mV
V
IH
Input HIGH voltage (single-ended) 3835 4120 3835 4120 3835 4120 mV
V
IL
Input LOW voltage (single-ended) 3190 3525 3190 3525 3190 3525 mV
Input HIGH voltage, common-mode
V
IHCMR
2.5 4.6 2.5 4.6 2.5 4.6 V
range (differential)
(4)
I
IH
Input HIGH current 150 150 150 µ A
I
IL
Input LOW current 0.5 0.5 0.5 µ A
(1) The device meets these 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 (2.54 m/s). 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 and output parameters vary 1:1 with V
CC
. V
EE
can vary +0.25 V / – 0.5 V.
(3) Outputs are terminated through a 50- Ω resistor to V
CC
– 2 V.
(4) V
IHCMR
min varies 1:1 with V
EE
; V
IHCMR
max varies 1:1 with V
CC
. The V
IHCMR
range is referenced to the more-positive side of the
differential input signal. Normal operation is obtained if the HIGH level falls within the specified range and the peak-to-peak voltage lies
between V
PP
min and 1 V.
PARAMETER – 40 ° C 25 ° C 85 ° C
UNIT
MIN TYP MAX MIN TYP MAX MIN TYP MAX
I
EE
Power-supply current 19 26 21 26 23 26 mA
V
OH
Output HIGH voltage
(3)
– 1085 – 880 – 1025 – 995 – 880 – 1025 – 880 mV
V
OL
Output LOW voltage
(3)
– 1830 – 1620 – 1810 – 1712 – 1620 – 1810 – 1620 mV
V
IH
Input HIGH voltage (single-ended) – 1165 – 880 – 1165 – 880 – 1165 – 880 mV
V
IL
Input LOW voltage (single-ended) – 1810 – 1475 – 1810 – 1475 – 1810 – 1475 mV
Input HIGH voltage, common-mode
V
IHCMR
– 2.5 – 0.4 – 2.5 – 0.4 – 2.5 – 0.4 V
range (differential)
(4)
I
IH
Input HIGH current 150 150 150 µ A
I
IL
Input LOW current 0.5 0.5 0.5 µ A
(1) The device meets these 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 (2.54 m/s). 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 and output parameters vary 1:1 with V
CC
. V
EE
can vary +0.25 V / – 0.5 V.
(3) Outputs are terminated through a 50- Ω resistor to V
CC
– 2 V.
(4) V
IHCMR
min varies 1:1 with V
EE
; V
IHCMR
max varies 1:1 with V
CC
. The V
IHCMR
range is referenced to the more-positive side of the
differential input signal. Normal operation is obtained if the HIGH level falls within the specified range and the peak-to-peak voltage lies
between V
PP
min and 1 V.
Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Link(s): SN65EL11
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