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E692AHJ 데이터시트 PDF




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부품번호 E692AHJ 기능
기능 200 MHz Monolithic Dual Pin Electronics Driver
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E692AHJ 데이터시트, 핀배열, 회로
EDGE HIGH-PERFORMANCE PRODUCTS
Description
Edge692
200 MHz Monolithic
Dual Pin Electronics Driver
Applications
The Edge692 is a dual pin electronics driver
manufactured in a high-performance, complementary • Memory Test Equipment
bipolar process. In Automatic Test Equipment (ATE) • Instrumentation
applications, the Edge692 offers two pin drivers suitable
for drive-only channels in memory testers, as well as for
bidirectional channels in memory, VLSI, and mixed- signal
test systems.
The Edge692 is designed to produce excellent waveforms
(low overshoot), especially at low swings (<500 mV), and
have extremely low leakage currents in HiZ mode. In
addition, the Edge692 is pin and functionally compatible
with both the Edge693 and the Bt692.
Each driver is capable of forcing 9V signals over a 12V
range, in addition to going into a high impedance state.
The driver slew rate is adjustable between 2 V/ns and 1
V/ns.
Functional Block Diagram
Each driver is completely isolated from the other. There
are separate data, enable, slew rate adjust, high and
low levels, as well as power supply inputs for each driver.
SLEWADJA
Combining two independent drivers into a 28 pin PLCC
package offers a highly integrated solution where speed
and density are at a premium.
Features
• 2 V/ns Driver Slew Rates
• Adjustable Driver Slew Rates
• Three Statable
• Low HiZ Leakage
• Low Voltage Driver Swings
• Low Overshoot Waveforms
• 12 V Output Range
• 9 V Output Swings
• 28-Pin PLCC with an Internal
Heat Spreader
• Edge693 Compatible
• Bt692 Compatible
DRVENA
DRVENA*
DHIA
DHIA*
DVHA
DVLA
BIAS
DRVENB
DRVENB*
DHIB
DHIB*
DVHB
DVLB
DRIVER A
EN
DRIVER B
EN
SLEWADJB
DOUTA
DOUTB
Revision 1 / March 31, 1998
1
www.semtech.com




E692AHJ pdf, 반도체, 판매, 대치품
EDGE HIGH-PERFORMANCE PRODUCTS
Circuit Description
Introduction
Driver Levels
The driver circuit will force the DOUT output to one of
three states:
1. DVH (driver high voltage level)
2. DVL (driver low voltage level)
3. High Impedance (Hi Z).
Both driver digital control inputs (DHI/DHI*, DRVEN/
DRVEN*) are wide-voltage differential inputs capable of
receiving ECL, TTL, and CMOS signals. Single-ended
operation is achievable by generating the proper
threshold levels for the inverting inputs.
Drive Enable
The drive enable (DRVEN/DRVEN*) inputs control
whether the driver is forcing a voltage or is placed in a
high-impedance state. If DRVEN is more positive than
DRVEN*, the output will force either DVL or DVH,
depending on the driver data inputs. When DRVEN is
more negative than DRVEN*, the output is set to high-
impedance, independent of the driver data inputs.
Driver Data
The driver data inputs (DHI/DHI*) determine whether
the driver output is high or low. If DHI is more positive
than DHI*, the output will force DVH when the driver is
enabled. If DHI is more negative than DHI*, the output
will force DVL when the driver is enabled.
Table 1 summarizes the functionality of the driver enable
and driver data pins.
DVH and DVL are high input impedance voltage controlled
inputs that establish the driver logical high and low levels
respectively.
DVLCAP / DVHCAP
These two analog nodes are brought out to better
stabilize the high and low driver levels. Much like placing
decoupling capacitors on the DVL and DVH input pins,
the DVLCAP and DVHCAP pins require a fixed .01 µF
chip capacitor (with good high frequency characteristics)
to ground. A tight layout with minimum etch is
recommended.
Driver Bias
The BIAS pin is an analog current input that establishes
a reference current for the driver and influences the
overall speed and power consumption of the chip. The
BIAS input current may be varied from 1.0 mA to 2.0
mA. Ideally, a current source would supply this current.
However, a resistor to a voltage source, typically VCC, is
acceptable.
The BIAS input structure is shown in Figure 1.
VCC
BIAS
REXT
DRVEN, DRVEN*
DHI, DHI*
DOUT
50
DRVEN > DRVEN*
DHI > DHI*
DVH
DRVEN > DRVEN*
DHI < DHI*
DVL
DRVEN < DRVEN*
X HiZ
VEE
Table 1. DRVEN and DHI Pin Functionality
Figure 1. BIAS Input Structure
2000 Semtech Corp.
4 www.semtech.com

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E692AHJ 전자부품, 판매, 대치품
EDGE HIGH-PERFORMANCE PRODUCTS
Application Information (continued)
Family of Curves for Rise and Fall Times for 3V Swings.
Rise Times for 3V Swings
3.5
3
2.5
2
1.5
1
1
1.4 1.8
Slewadj (mA)
2.2
Ibias = 1.0 mA
Ibias = 1.25 mA
Ibias = 1.5 mA
Ibias = 1.75 mA
Ibias = 2.0 mA
Fall Times for 3V Swings
3.5
3
2.5
2
1.5
1
1
1.4 1.8
Slewadj (mA)
2.2
2000 Semtech Corp.
7
Ibias = 1.0 mA
Ibias = 1.25 mA
Ibias = 1.5 mA
Ibias = 1.75 mA
Ibias = 2.0 mA
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부품번호상세설명 및 기능제조사
E692AHJ

200 MHz Monolithic Dual Pin Electronics Driver

Semtech Corporation
Semtech Corporation

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