19-0861; Rev 1; 3/10
Fast Dual Driver for ATE with
Waveform Shaping
General Description
The MAX9957 dual driver IC for automatic test equip-
ment (ATE) memory applications offers three-level drive
capability, high-speed switching, low timing dispersion,
and features voltage-controlled waveform shaping to
enhance edge-placement accuracy and minimize dis-
tortion. It also provides tight matching of gain and off-
set. The MAX9957 buffers reference voltage inputs for
each channel with nominal -1V to +3.5V voltage ranges.
High-speed differential control inputs, compatible with
CML levels, are provided for each channel. Static
power dissipation is only 1500mW per channel with
nominal -5V and +7V supplies. The MAX9957 power
dissipation at 2Gbps toggling is only 1550mW/channel.
The MAX9957D power dissipation at 2.4Gbps is only
1850mW/channel.
The MAX9957 is available in a 10mm x 10mm x 1mm,
64-pin TQFP package with an exposed pad, inverted
die pad for ease of heat removal.
o
Terminator/3-Level Driver
o
2Gbps Toggling at 2V
P-P
(MAX9957)
o
2.4Gbps Toggling at 2V
P-P
(MAX9957D)
o
Voltage-Controlled Waveform Shaping
o
Interfaces Easily With Most Logic Families
o
Low Timing Dispersion
Features
MAX9957
Ordering Information
PART
MAX9957CCB-D
MAX9957CCB+D
MAX9957DCCB+D
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
64 TQFP-EPR*
64 TQFP-EPR*
64 TQFP-EPR*
Applications
Automatic Test Equipment
DDR2 Memory Testers
GDDR3
GDDR4
-Denotes
a package containing lead(Pb).
D = Dry pack.
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EPR
= Exposed pad reversed (exposed pad on top of device).
Typical Operating Circuit
TOP VIEW
GND
GND
GND
OVL
V
CC
V
CC
V
EE
V
L
Pin Configuration
DOVS1
DOVL1
DHV1
DTV1
DLV1
GND
V
CC
V
EE
48
V
EE
47
GND
46
NDATA1
45
DATA1
44
DTERM1
43
NRCV1
42
RCV1
41
RTERM1
40
RTERM2
39
RCV2
38
NRCV2
37
DTERM2
36
DATA2
35
NDATA2
34
GND
33
V
EE
MAX9957
DHV_
DTV_
DLV_
DOVS_
DOVL_
ONE OF TWO CHANNELS SHOWN
INPUT
MUX
WAVE
SHAPING
BUFFER
DUT_
DDR3
MEMORY
I/O
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
V
EE
V
CC
GND
V
CC
V
EE
MAX9955
1
2
3
4
5
6
7
8
9
DUT1
DUT_
DTV_
V
EE
V
CC
V
CC
MAX9957
CHV_
CH_
V
EE
10
DUT2
11
V
EE
12
V
CC
13
NCH_
DROOP
COMPENSATION
CL_
GND
14
V
CC
15
V
EE
16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
NCL_
CLV_
COS_
COL_
ONE OF TWO CHANNELS SHOWN
GND
GND
V
EE
GND
TEMP
DOVL2
DOVS2
DTV2
DHV2
DLV2
GND
RST
V
CC
V
CC
TQFP-EPR
10mm
×
10mm
×
1mm
________________________________________________________________
Maxim Integrated Products
V
CC
V
EE
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Fast Dual Driver for ATE with
Waveform Shaping
MAX9957
ABSOLUTE MAXIMUM RATINGS
V
CC
to GND ..............................................................-0.3V to +8V
V
EE
to GND...............................................................-6V to +0.3V
V
CC
- V
EE
................................................................-0.3V to +14V
V
L
to GND..............................................................-0.3V to +4.1V
DUT_ to GND............................................................-2V to +4.5V
DATA_, NDATA_, RCV_, NRCV_ to GND ................-0.3V to 4.1V
DATA_ to NDATA_, RCV_ to NRCV_ ..................................±1.5V
V
DTERM_
- V
DATA_
....................................................+2V to -0.3V
V
DTERM_
- V
NDATA_
..................................................+2V to -0.3V
V
RTERM_
- V
RCV_
......................................................+2V to -0.3V
V
RTERM_
- V
NRCV_
....................................................+2V to -0.3V
DTERM_, RTERM_ to GND....................................-0.3V to +4.1V
RST to GND...................................................-0.3V to (V
L
+ 0.3V)
DHV_, DLV_, DTV_ to GND (MAX9957) ...................-2V to +4.5V
DHV_, DLV_, DTV_ to GND (MAX9957D)..............-1.7V to +4.5V
DOVS_, DOVL_ to GND.........................................-0.3V to +4.1V
OVL to GND ..................................................-0.3V to (V
L
+ 0.3V)
All Other Pins to GND ......................(V
EE
- 0.3V) to (V
CC
+ 0.3V)
TEMP Current...................................................-0.5mA to +20mA
DUT_ Current ....................................................-80mA to +80mA
DUT_ Short Circuit to -1V to +3.5V.............................Continuous
Package Power Dissipation (T
A
= +70°C)
64-Pin TQFP-EP-IDP (derate 125mW/°C above +70°C) ...10W
Storage Temperature Range ............................ -65°C to +150°C
Junction Temperature ......................................................+125°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
CC
= +7V, V
EE
= -5V, V
L
= +3.3V, V
RTERM_
= V
DTERM_
= +3.3V, V
DHV_
= +2V, V
DLV_
= 0V, V
DTV_
= +1V, V
DOVS_
= V
DOVL_
= 0V,
T
J
= +70°C ±10°C, unless otherwise noted. All temperature coefficients are measured at T
J
= +50°C to +90°C.)
PARAMETER
DC CHARACTERISTICS (Note 1)
Voltage Range
Voltage Swing
DHV:
V
DHV_
= 0 and 2.5V, V
DLV_
= -1V, V
DTV_
= 1.5V
Gain
(Note 2)
DTV:
V
DTV_
= 0 and 2.5V, V
DLV_
= -1V, V
DHV_
= 3.5V
DLV:
V
DHV_
= 3.5V, V
DLV_
= 0 and 2.5V, V
DTV_
= 1.5V
DHV:
V
DHV_
= 0 and 2.5V, V
DLV_
= -1V, V
DTV_
= 1.5V
Gain Temperature Coefficient
DTV:
V
DTV_
= 0 and 2.5V, V
DLV_
= -1V, V
DHV_
= 3.5V
DLV:
V
DHV_
= 3.5V, V
DLV_
= 0 and 2.5V, V
DTV_
= 1.5V
DHV:
V
DHV_
= 2V, V
DLV_
= -1V, V
DTV_
= 1.5V
Offset
DTV:
V
DHV_
= 3.5V, V
DLV_
= -1V, V
DTV_
= 1V
DLV:
V
DHV_
= 3.5V, V
DLV_
= 0V, V
DTV_
= 1.5V
-1.0
0.1
0.997
0.997
0.997
1.000
1.000
1.000
-70
-60
-70
±20
±20
±20
mV
ppm/°C
+3.5
4.0
1.003
1.003
1.003
V/V
V
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2
_______________________________________________________________________________________
Fast Dual Driver for ATE with
Waveform Shaping
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +7V, V
EE
= -5V, V
L
= +3.3V, V
RTERM_
= V
DTERM_
= +3.3V, V
DHV_
= +2V, V
DLV_
= 0V, V
DTV_
= +1V, V
DOVS_
= V
DOVL_
= 0V,
T
J
= +70°C ±10°C, unless otherwise noted. All temperature coefficients are measured at T
J
= +50°C to +90°C.)
PARAMETER
SYMBOL
CONDITIONS
DHV:
V
DHV_
= 2V, V
DLV_
= -1V, V
DTV_
= 1.5V
Offset Temperature Coefficient
DTV:
V
DHV_
= 3.5V, V
DLV_
= -1V, V
DTV_
= 1V
DLV:
V
DHV_
= 3.5V, V
DLV_
= 0V, V
DTV_
= 1.5V
DHV:
V
DLV_
= -1V, V
DHV_
/ V
DUT_
= 3.50V / 1.25V,
and 1.25V / 3.50V
DC Output Current
DLV:
V
DHV_
= 3.5V, V
DLV_
/ V
DUT_
= +1.25V / -1V
and -1V / +1.25V
DC Output Resistance
DC Output Resistance Variation
I
DUT_
= ±20mA, V
DUT_
= V
DHV_
= 1.25V (Note 3)
I
DUT_
= ±1mA, ±8mA; V
DUT_
= V
DHV_
= 1.25V
MAX9957
I
DUT_
= ±1mA, ±8mA, ±15mA,
±40mA; V
DUT_
= V
DHV_
= 1.25V MAX9957D
DHV:
V
DHV_
= -1V to +3.5V, V
DLV_
= -1V,
V
DTV_
= 1.5V
Linearity Error
(Note 2)
DTV:
V
DHV_
= 3.5V, V
DLV_
= -1V, V
DTV_
= -1V to
+3.5V
DLV:
V
DHV_
= 3.5V, V
DLV_
= -1V to +3.5V,
V
DTV_
= 1.5V
Power-Supply Rejection Ratio
DC Crosstalk
(Note 4)
(Note 5)
V
DHV_
= 2V, V
DLV_
= 0V
(Note 12)
MAX9957
MAX9957D
0.75
0.55
1.00
0.80
+0.85
V
DHV_
= 2V, V
DLV_
= 0V (Note 12)
Same edges (LH and HL)
2V
P-P
, 40MHz, 0.5ns to 24.5ns pulse width,
relative to 12.5ns pulse width
1V
P-P
, V
DLV_
= -0.5V to +2V, relative to
V
DLV_
= 0.75V
±50
±15
±10
±100
±40
48
50
0.3
1.1
1.5
52
1.0
2.0
3.0
±15
Ω
Ω
±40
mA
MIN
TYP
-100
-40
+60
µV/°C
MAX
UNITS
MAX9957
±15
mV
±15
±18
±5
1.25
1.05
mV/V
mV
AC CHARACTERISTICS (Z
L
= 50Ω) (Notes 6, 7)
Prop Delay, Data to Output
Prop-Delay Temperature
Coefficient
Prop Delay Match, TLH to THL
Prop Delay Skew, Channel-to-
Channel
Prop Delay Change Versus Pulse
Width
Prop Delay Change Versus
Common-Mode Voltage
ns
ps/°C
ps
ps
ps
ps
_______________________________________________________________________________________
3
Fast Dual Driver for ATE with
Waveform Shaping
MAX9957
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +7V, V
EE
= -5V, V
L
= +3.3V, V
RTERM_
= V
DTERM_
= +3.3V, V
DHV_
= +2V, V
DLV_
= 0V, V
DTV_
= +1V, V
DOVS_
= V
DOVL_
= 0V,
T
J
= +70°C ±10°C, unless otherwise noted. All temperature coefficients are measured at T
J
= +50°C to +90°C.)
PARAMETER
Prop Delay, Data to Term and
Term to Data
Rise/Fall Time, 1V
Rise/Fall Time, 2V
Minimum Pulse Width, 1V
Minimum Pulse Width, 2V
SYMBOL
(Note 12)
V
DHV_
= 1V, V
DTV_
= 0.5V,
V
DLV_
= 0V, 20% to 80%
V
DHV_
= 2V, V
DTV_
= 1V,
V
DLV_
= 0V, 20% to 80%
V
DHV_
= 1V, V
DLV_
= 0V, time to
reach 95% amplitude (Note 12)
V
DHV_
= 2V, V
DLV_
= 0V, time to
reach 95% amplitude (Note 12)
0.5V to 2V swing (Notes 8 and 9)
CONDITIONS
MAX9957
MAX9957D
MAX9957
MAX9957D
MAX9957
MAX9957D
MAX9957
MAX9957D
MAX9957
MAX9957D
MIN
0.73
0.63
80
70
100
100
TYP
0.98
0.88
130
120
150
140
350
270
400
300
(4% to
25%) +
25
0
1
5
3.3
MAX
1.23
1.13
180
160
200
190
450
370
500
400
UNITS
ns
ps
ps
ps
ps
Overshoot
Input Voltage Range,
DOVS_/DOVL_
Undershoot
Output Return Loss By TDR
mV
0V = no peaking, 3.3V = 25% peaking
0.5V to 2V swing (Note 9)
Drive amplitude = 1V, V
DLV_
= 0V, V
DHV_
=
1V, rise time = 150ps (10% to 90%) (Note 10)
V
%
%
DIFFERENTIAL CONTROL INPUTS (DATA_, NDATA_, RCV_, and NRCV_)
Input High Voltage
Input Low Voltage
Differential Input Voltage
Voltage Between a Differential
Input and its Termination
Input Termination Voltage
Input Termination Resistor
SINGLE-ENDED INPUTS (DLV_, DHV_, DTV_, DOVS_, and DOVL_)
Input Bias Current
SINGLE-ENDED INPUT (RST)
Input High Voltage
Input Low Voltage
Input Bias Current
SINGLE-ENDED OUTPUT (OVL) (Note 7)
Digital Supply Voltage
Digital Supply Current
Output High Voltage
V
L
I
L
No load
Load current = -1mA
3.00
0.5
V
L
- 0.4
1.0
3.60
2.0
V
L
V
mA
V
1.65
-0.10
3.50
+0.85
±50
V
V
µA
±25
µA
1.0
0.8
±0.2
0
1.7
48
50
3.6
3.4
±1.0
1.9
3.6
52
V
V
V
V
V
Ω
4
_______________________________________________________________________________________
Fast Dual Driver for ATE with
Waveform Shaping
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +7V, V
EE
= -5V, V
L
= +3.3V, V
RTERM_
= V
DTERM_
= +3.3V, V
DHV_
= +2V, V
DLV_
= 0V, V
DTV_
= +1V, V
DOVS_
= V
DOVL_
= 0V,
T
J
= +70°C ±10°C, unless otherwise noted. All temperature coefficients are measured at T
J
= +50°C to +90°C.)
PARAMETER
Output Low Voltage
Rise/Fall Time
Overcurrent Detect Threshold
TEMPERATURE MONITOR
Nominal Voltage
Temperature Coefficient
Output Resistance
POWER SUPPLIES
Positive Voltage Range
Positive Supply Current
Negative Voltage Range
Negative Supply Current
Static Power Dissipation
Operating Power Dissipation
V
CC
I
CC
V
EE
I
EE
f
OUT
= 0Gbps
f
OUT
= 2Gbps, 2V
P-P
MAX9957
MAX9957D
MAX9957
MAX9957D
MAX9957
MAX9957D
MAX9957
MAX9957D
6.75
204
245
-5.50
260
295
2.4
3.05
7.00
222
265
-5.00
283
330
3.0
3.5
3.1
3.7
7.50
240
285
-4.75
306
360
3.6
4.15
V
mA
V
mA
W
W
17
T
J
= +70°C, R
L
> 10MΩ
3.43
+10
23
29
V
mV/°C
kΩ
SYMBOL
CONDITIONS
Load current = 1mA
10% to 90% (Note 11)
(Note 12)
±50
MIN
0
3.6
±80
TYP
MAX
0.4
UNITS
V
ns
mA
MAX9957
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
Note 9:
R
L
≥
10MΩ, unless otherwise noted. All specifications apply to DHV, DLV, and DTV.
Relative to a straight line through 0 and 2.5V.
Other values of DC output resistance are available on request, contact factory; 45Ω to 51Ω.
Change in offset voltage with power supplies independently set to their minimum and maximum values.
DC crosstalk is to be measured under six different conditions shown below with the worst case reported:
1) DTV to DHV: V
DHV_
= 3.5V, V
DLV_
= 3.4V, V
DTV_
= -1V to +3.5V (Driver Output: DHV)
2) DTV to DLV: V
DHV_
= -0.9V, V
DLV_
= -1V, V
DTV_
= -1V to +3.5V (Driver Output: DLV)
3) DHV to DLV: V
DTV_
= -1V, V
DLV_
= -1V, V
DHV_
= -0.9V to +3.5V (Driver Output: DLV)
4) DHV to DTV: V
DTV_
= -1V, V
DLV_
= -1V, V
DHV_
= -0.9V to +3.5V (Driver Output: DTV)
5) DLV to DHV: V
DHV_
= 3.5V, V
DTV_
= 3.5V, V
DLV_
= -1V to +3.4V (Driver Output: DHV)
6) DLV to DTV: V
DHV_
= 3.5V, V
DTV_
= 3.5V, V
DLV_
= -1V to +3.4V (Driver Output: DTV)
Load is a terminated 3ns, 50Ω transmission line with 50Ω external termination resistor to GND, unless otherwise specified.
Propagation delays are measured from the crossing point of the differential input signals to the 50% point of the expected
output swing. Rise time of the differential inputs DATA_ and RCV_ is 300ps (10% to 90%).
Guaranteed by design.
Driver overshoot setting and output waveform. The voltage range of DOVS_, DOVL_ is 0 to +3.3V, 0 is for no overshoot,
and +3.3V is for 25% overshoot, respectively. The fall time of overshoot for DOVS_ (90% to 10%) is 77ps, the fall time of
overshoot for DOVL_ (90% to 10%) is 1.5ns.
The definitions of overshoot and undershoot are detailed in this figure:
OVERSHOOT
UNDERSHOOT
UNDERSHOOT
OVERSHOOT
_______________________________________________________________________________________
5
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