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PDF E647ATF Data sheet ( Hoja de datos )
| Número de pieza | E647ATF | |
| Descripción | Pin Electronics Driver/ Window Comparator/ and Switch Matrix | |
| Fabricantes | Semtech Corporation | |
| Logotipo |  |
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EDGE HIGH-PERFORMANCE PRODUCTS
Description
Edge647
Pin Electronics Driver, Window
Comparator, and Switch Matrix
Applications
The Edge647 is an integrated trinary driver, window • Low Cost Automatic Test Equipment
comparator, and switch matrix pin electronics solution
manufactured in a wide voltage CMOS process. It is
designed for automatic test equipment and
instrumentation where cost, functional density, and power
are all at a premium.
The tristatable driver is capable of generating 3 levels -
one for a logic high, one for a logic low, and one for either
a termination voltage or a special programming voltage.
The on-board window comparator effectively determines
whether the DUT is in a high, low, or intermediate state. Functional Block Diagram
The switches are included to allow such functions as PMU,
pull up, and pull down connections.
VH VTT VL
The Edge647 is intended to offer an extremely low leakage,
low cost, low power, small footprint, per pin solution for
100 MHz and below pin electronics applications. It is a
higher performance, pin and functionally compatible
version of the Edge646.
DATA
DATA*
DVR EN
DVR EN*
VTT EN
VTT EN*
SW0
DOUT
Features
• Pin Compatible with the Edge646
• 100 MHz Operation
• 12V I/O Range
• Programmable Output Levels
• Flex In digital Inputs (Technology Independent)
• Three Level Driver
• Extremely Low Leakage Currents (~0 nA)
• Small Footprint (32 Pin, 7 mm X 7 mm,
TQFP Package)
SW0 EN*
SW1
SW1 EN*
SW2
SW2 EN*
VBB
COMPA
HIGH LEVEL
LOW LEVEL
COMPB
LOAD
CVA
VINP
CVB
Revision 2 / October 27, 2000
1
www.semtech.com
1 page  
Edge647
EDGE HIGH-PERFORMANCE PRODUCTS
Circuit Description (continued)
Receiver Functionality
Load
The Edge647 supports an on-board window comparator.
CVB and CVA are high impedance analog inputs which
establish the threshold voltages. COMPA and COMPB are
the digital outputs which reflect the real time status of
VINP. Table 2 summarizes the relationship between the
threshold levels, VINP, and the output signals.
VINP
COMPA
COMPB
The Edge647 provides a total of 3 analog switches.
Individual switches vary in both their on resistance and
their on/off time (see Table 4).
Like the driver digital inputs, the switch matrix control inputs
SW0-3 EN* are technology independent as VBB
determines their threshold level. The switch control is
documented in Table 3.
VINP < CVA
VINP > CVA
VINP < CVB
VINP > CVB
1
0
X
X
X
X
0
1
Table 2. Comparator Truth Table
Comparator Outputs
The comparator outputs are 50 Ω output impedance non-
tristatable drivers designed to cleanly drive 50 Ω
transmission lines without requiring any external series
termination resistors. Input pins LOW LEVEL and HIGH
LEVEL establish the logic 0 and 1 levels respectively. In
normal operation, LOW LEVEL would be connected to
ground and HIGH LEVEL would be connected to a system
VDD supply, producing CMOS digital swings at the output.
Control Inputs
SW0 EN* = 1
SW0 EN* = 0
SW1 EN* = 1
SW1 EN* = 0
SW EN* = 1
SW2 EN* = 0
Status
SW0 disconnected
SW0 connected
SW1 disconnected
SW1 connected
SW2 disconnected
SW2 connected
Table 3. Switch Matrix Truth Table
Switch
SW0
SW1
SW2
Rout
50 Ω
50 Ω
50 Ω
On/Off Time
100 ns
100 ns
100 ns
However, the comparator outputs are technology
independent in that they can drive PECL, 3V CMOS, ECL,
LV CMOS, GTL, and custom levels by varying LOW LEVEL
and HIGH LEVEL. For example, should a 3V swing be
desired, HIGH LEVEL could be connected to a 3.0V power
supply.
Table 4. Switch Matrix Characteristics
Do NOT leave any digital input pins floating.
Notice that HIGH LEVEL and LOW LEVEL provide both the
voltage level and the current for the comparator outputs.
HIGH LEVEL and LOW LEVEL may be varied between +5V
and -2V.
2000 Semtech Corp.
5 www.semtech.com
5 Page 
EDGE HIGH-PERFORMANCE PRODUCTS
DC Characteristics (continued)
Digital Inputs
DATA / DATA*, DVR EN* / DVR EN, VTT EN / VTT EN*
SW0 EN*, SW1 EN*, SW2 EN*, SW3 EN*
Parameter
Input High Voltage
Input Low Voltage
Input Current
Input Capacitance
Digital Input Voltage Range
Digital Input Threshold
Symbol
Input - Input*
Input* - Input
IIN
DATA
DRV EN
VTT EN
INPUT, INPUT*
VBB
Min
.8
.8
-2.0*
-1.4
Typ
0
Edge647
Max
5
5
1.0
8
8
8
+5.0
4.4
Units
V
V
µA
pF
pF
pF
V
V
*-2V or (VEE + 2.0V), whichever is more positive.
Note 1: This parameter is guaranteed by design and characterization. Production testing is performed
against a ± 250 nA limit.
Note 2: Measured at 0V.
Note 3: Measured at HIGH LEVEL = +3.3V, LOW LEVEL = 0V.
Note 4: Production tested at +5V and 0V against ± 10 nA limits. Also tested at VCC and VEE against ± 250
nA limits.
2000 Semtech Corp.
11 www.semtech.com
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet E647ATF.PDF ] | |
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