Variable Output Pulse Driver

SKU:

$ 1,121.25

Applications:

  • Long Line Driver/ Level Translator
  • Laser Diode Driver
  • TTL/CMOS/NECL Device Testing
  • Amplifier Large Signal Response Testing
  • TDR Source for Cable Testing
  • A Mini-Modular Instrument™ (MMI)

Features:

  • tr= 800 ps Typical @ 5 V Output into 50 Ω
  • +5 V/-3 V Output HL/LL into 50 Ω
  • +10 V/-6 V Output HL/LL into 1 MΩ
  • Normal or Inverted Output
  • f/2 Mode for Square Wave Output
  • fmax to 300 MHz @ 3.5 V Output
  • TTL and single-ended NECL Compatible Inputs (logically ORed)
  • Self-contained 1.3 x 2.9 x 8.1-in. Module includes an AC/DC adapter

Description

The PRL-470B is a high speed 50 Ω Line Driver/Level Translator with independently variable output Hi and Lo levels. It has TTL- and NECL-compatible inputs. The TTL input has a 50 Ω to ground termination, and the single-ended NECL input has a 50 Ω/-2 V termination. The TTL and NECL inputs are logically ORed; therefore a Hi level applied to either input can be used as a gate signal. 

The output Hi and Lo levels are independently variable from 0 V to +5 V and 0 V to -3 V into 50 Ω, respectively, or 0 V to +10 V and 0 V to -6 V into 1 MΩ. The maximum output peak to peak swing is 8 V into 50 Ω, or 16 V into 1 MΩ. The back-terminated 50 Ω output can drive long 50 Ω lines with or without load termination. A Normal/Invert switch provides output logic polarity selection, and an f/2 switch provides square wave output. The 50 Ω TTL input requires less than 1 V for triggering.

The 800 ps rise time output makes the PRL-470B a cost-effective TDR source for testing cables. Typical maximum clock rate is 300 MHz @ 3.5 V output and 250 MHz @ 5 V output, well suited for testing logic circuits of different families, amplifiers and many semiconductor devices.

The trigger output generates > 1 V into 50 Ω or > 2 V into high impedance, and is back-matched with 50 Ω for driving un-terminated loads. The self-contained 1.3 x 2.9 x 8.1-in module is supplied with a ±8.5 V/+17 V AC/DC adapter.

Multiple PRL-470B modules together with other PRL logic function modules, such as Clock Sources, Fanout buffers, Frequency Dividers, Programmable Delay Lines, Logic Level Translators, etc., can be rack-mounted for systems test applications. Consult factory for more information.

Fig. 1, PRL-470B Block Diagram

SPECIFICATIONS (0° C ≤ TA ≤ 35° C)*

Symbol Parameter Min Typ Max Unit Comments
RIN Input Resistance 49.5 50 50.5 Ω  
VTT1 TTL Input Termination Voltage   GND    
VTT2 NECL Input Termination Voltage   -2   V  
VIL1 TTL Input Low Level -0.5 0.0 0.5 V  
VIL2 NECL Input Low Level -2.4 -1.8 -1.5 V Terminated into 50 Ω/-2 V
VIH1 TTL input High Level 0.80 0.85 5.0 V  
VIH2 NECL Input High Level -1.0 -0.8 -0.5 V Terminated into 50 Ω/-2 V
VOLNL Output Low Level, No Load -6   0 V RL=1 MΩ
VOLFL Output Low Level, Full Load -3   0 V RL=50 Ω
VOHNL Output High Level, No Load 0   10 V RL=1 MΩ
VOHNL Output High Level, Full Load 0   5 V RL=50 Ω
VPPNL Output Voltage Swing, No Load 1.6   16 V RL=1 MΩ
VPPFL Output Voltage Swing, Full Load 0.8   8 V RL=50 Ω
IDC1 DC Input Currents, +8.5 V   +380 +390 mA
IDC2 DC Input Currents, -8.5 V   -450 -465 mA
IDC3 DC Input Currents, +17 V   +140 +180 mA
VDC1 DC Input Voltages, +8.5 V 7.5 8.5 12 V  
VDC2 DC Input Voltages, -8.5 V -12 -8.5 -7.5 V  
VDC3 DC Input Voltages, +17 V +15 +17 +20 V  
VAC AC/DC Adapter Input Voltage 103 115 127 V  
tPLH/tPHL VO Propagation Delay to Output ↑/↓   5.5 7.5 ns VOL=0 V, VOH=5 V
tPLH/tPHL VOT Propagation Delay to Trigger Output ↑/↓   2.5 3.5 ns  
tr1 Output Rise Time (10%-90%)   0.8 0.9 ns VOL=0 V, VOH=5 V
tf1 Output Fall Time (10%-90%)   1.4 1.65 ns VOL=0 V, VOH=5 V
tr2 Output Rise Time (10%-90%)   0.75 0.80 ns VOL=0 V, VOH=3.5 V
tf2 Output Fall Time (10%-90%)   1.2 1.3 ns VOL=0 V, VOH=3.5 V
tr3 Output Rise Time (10%-90%)   0.75 0.8 ns VOL=-2.5 V, VOH=2.5 V
tf3 Output Fall Time (10%-90%)   1.2 1.2 ns VOL=-2.5 V, VOH=2.5 V
tr4 Output Rise Time (10%-90%)   0.9 1.1 ns VOL=-3 V, VOH=5 V
tf4 Output Fall Time (10%-90%)   1.6 2.0 ns VOL=-3 V, VOH=5 V
TSKEW Skew between Vo↑ and Vo↓   100 300** ps VOL=0 V, VOH=5 V, F=50 MHz, PW=5 ns
Fmax1 Maximum Clock Frequency 225 250   MHz VOL=0 V, VOH=5 V
Fmax2 Maximum Clock Frequency 250 300   MHz VOL=0 V, VOH=3.5 V
Fmax3 Maximum Clock Frequency 250 300   MHz VOL=-2.5 V, VOH=2.5 V
Fmax4 Maximum Input Clock Frequency 500 600   MHz Square wave mode
PWMin Minimum Output Pulse Width   2.0 2.5 ns VPP= 5 V
∆PW Output PW change, VO↑ to VO   100 400** ps VO=0 to 5 V, PW=5 ns
VO Trig Trigger Output 1 1.2   V RL=50 Ω , f ≤ 250 MHz
  Size 1.3 x 2.9 x 8.1 in.  
  Weight, excluding AC adapter 13 Oz  
  Shipping weight, including AC adapter 4 lb.  
** Skew and ∆PW may vary with different output level, frequency and pulse width settings.