Buffers good for comms

Texas Instruments has introduced eight new high gain output oscillator buffers.



Measuring just 2 x 2 x 0.55 mm, the new oscillator products enable designers to save space while also minimizing jitter and power consumption. The devices provide differential signal output in low-voltage differential signaling (LVDS) or low-voltage pseudo emitter-coupled logic (LVPECL) and clock signal amplification for telecommunications switching equipment.



The SN65LVDS16/17/18/19 and SN65LVP16/17/18/19 are high-frequency oscillator gain stage buffers supporting LVDS and LVPECL on the high gain outputs in 3.3-V or 2.5-V systems.



The devices afford oscillator designers their choice of rise times: 2 Gbps (LVDS/LVP16 and LVDS/LVP17) and 1 Gbps (LVDS/LVP18 and LVDS/LVP 19). In addition, the family provides the option of both single-ended input on the LVDS/LVP16 and LVDS/LVP18 and fully differential inputs on the LVDS/LVP17 and LVDS/LVP19.



The LVDS/LVP16 and LVDS/LVP18 provide three gain control options from 300 mV to 860 mV, allowing the designer to optimize the buffer based on system needs.


The new devices offer 3.3-V and 2.5-V operation, enabling designers to migrate seamlessly to 2.5-V supply as system needs dictate. TI says that each device offers power savings when compared to the nearest competition, with power reductions ranging from 15 percent to 66 percent. For example, the LVP18/19 each uses only 50 mW, about one-third the power consumption of comparable devices.


The new devices join other TI oscillator products such as the CDCM1802/04. These mixed-output low-voltage PECL and low-voltage transistor-to-transistor (LVTTL) devices provide timing module and voltage-controlled crystal oscillator designers integrated low-voltage PECL and LVTTL outputs in a 3 x 3 mm and 4 x 4 mm package, respectively.



This is especially useful for designers who need a LVTTL feedback in their PLL module design. The buffers also include multiple divider options, which are chosen through external select pins.



The SN65LVDS16/17/18/19 and SN65LVP16/17/18/19 are available in volume from TI and its authorized distributors, packaged in an eight-pin, 2 x 2 x 0.55 mm Lead (Pb)-Free small-outline no-lead package.



Suggested resale pricing in 1,000-piece quantities is $2.55 each for the LVDS16/17/18/19 and $1.95 for the LVP16/17/18/19.