GSI GS88237BB-250I

GS88237BB/D-333/300/250/200
119- & 165-Bump BGA
Commercial Temp
Industrial Temp
256K x 36
9Mb SCD/DCD Sync Burst SRAM
Features
333 MHz–200 MHz
2.5 V or 3.3 V VDD
2.5 V or 3.3 V I/O
SCD and DCD Pipelined Reads
The GS88237BB/D is a SCD (Single Cycle Deselect) and
DCD (Dual Cycle Deselect) pipelined synchronous SRAM.
DCD SRAMs pipeline disable commands to the same degree
as read commands. SCD SRAMs pipeline deselect commands
one stage less than read commands. SCD RAMs begin turning
off their outputs immediately after the deselect command has
been captured in the input registers. DCD RAMs hold the
deselect command for one full cycle and then begin turning off
their outputs just after the second rising edge of clock. The user
may configure this SRAM for either mode of operation using
the SCD mode input.
• Single/Dual Cycle Deselect selectable
• IEEE 1149.1 JTAG-compatible Boundary Scan
• ZQ mode pin for user-selectable high/low output drive
• 2.5 V or 3.3 V +10%/–10% core power supply
• 2.5 V or 3.3 V I/O supply
• LBO pin for Linear or Interleaved Burst mode
• Internal input resistors on mode pins allow floating mode pins
• Default to SCD x18/x36 Interleaved Pipeline mode
• Byte Write (BW) and/or Global Write (GW) operation
• Internal self-timed write cycle
• Automatic power-down for portable applications
• JEDEC-standard 119-bump and 165-bump BGA packages
• Pb-Free 119-bump and 165-bump BGA packages available
Byte Write and Global Write
Byte write operation is performed by using Byte Write enable
(BW) input combined with one or more individual byte write
signals (Bx). In addition, Global Write (GW) is available for
writing all bytes at one time, regardless of the Byte Write
control inputs.
Functional Description
Applications
The GS88237BB/D is a 9,437,184-bit high performance
synchronous SRAM with a 2-bit burst address counter.
Although of a type originally developed for Level 2 Cache
applications supporting high performance CPUs, the device
now finds application in synchronous SRAM applications,
ranging from DSP main store to networking chip set support.
FLXDrive™
The ZQ pin allows selection between high drive strength (ZQ
low) for multi-drop bus applications and normal drive strength
(ZQ floating or high) point-to-point applications. See the
Output Driver Characteristics chart for details.
Sleep Mode
Low power (Sleep mode) is attained through the assertion
(High) of the ZZ signal, or by stopping the clock (CK).
Memory data is retained during Sleep mode.
Controls
Addresses, data I/Os, chip enable (E1), address burst control
inputs (ADSP, ADSC, ADV), and write control inputs (Bx,
BW, GW) are synchronous and are controlled by a positiveedge-triggered clock input (CK). Output enable (G) and power
down control (ZZ) are asynchronous inputs. Burst cycles can
be initiated with either ADSP or ADSC inputs. In Burst mode,
subsequent burst addresses are generated internally and are
controlled by ADV. The burst address counter may be
configured to count in either linear or interleave order with the
Linear Burst Order (LBO) input. The Burst function need not
be used. New addresses can be loaded on every cycle with no
degradation of chip performance.
Core and Interface Voltages
The GS88237BB/D operates on a 2.5 V or 3.3 V power supply.
All input are 3.3 V and 2.5 V compatible. Separate output
power (VDDQ) pins are used to decouple output noise from the
internal circuits and are 3.3 V and 2.5 V compatible.
Parameter Synopsis
Pipeline
3-1-1-1
3.3 V
2.5 V
Rev: 1.04 3/2005
tKQ
tCycle
Curr (x36)
Curr (x36)
-333
2.0
3.0
-300
2.2
3.3
-250
2.3
4.0
-200 Unit
2.7
ns
5.0
ns
435
435
395
395
330
330
270
270
mA
mA
1/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
GS88237B Pad Out—119-Bump BGA—Top View (Package B)
Rev: 1.04 3/2005
1
2
3
4
5
6
7
A
VDDQ
A6
A7
ADSP
A8
A9
VDDQ
B
NC
NC
A4
ADSC
A15
A17
NC
C
NC
A5
A3
VDD
A14
A16
NC
D
DQC4
DQC9
VSS
ZQ
VSS
DQB9
DQB4
E
DQC3
DQC8
VSS
E1
VSS
DQB8
DQB3
F
VDDQ
DQC7
VSS
G
VSS
DQB7
VDDQ
G
DQC2
DQC6
BC
ADV
BB
DQB6
DQB2
H
DQC1
DQC5
VSS
GW
VSS
DQB5
DQB1
J
VDDQ
VDD
NC
VDD
NC
VDD
VDDQ
K
DQD1
DQD5
VSS
CK
VSS
DQA5
DQA1
L
DQD2
DQD6
BD
SCD
BA
DQA6
DQA2
M
VDDQ
DQD7
VSS
BW
VSS
DQA7
VDDQ
N
DQD3
DQD8
VSS
A1
VSS
DQA8
DQA3
P
DQD4
DQD9
VSS
A0
VSS
DQA9
DQA4
R
NC
A2
LBO
VDD
VDDQ/
DNU
A13
PE
T
NC
NC
A10
A11
A12
NC
ZZ
U
VDDQ
TMS
TDI
TCK
TDO
NC
VDDQ
2/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
165 Bump BGA—x36 Common I/O—Top View (Package D)
1
2
3
4
5
6
7
8
9
10
11
A
NC
A
E1
BC
BB
E3
BW
ADSC
ADV
A
NC
A
B
NC
A
E2
BD
BA
CK
GW
G
ADSP
A
NC
B
C
DQC
NC
VDDQ
VSS
VSS
VSS
VSS
VSS
VDDQ
NC
DQB
C
D
DQC
DQC
VDDQ
VDD
VSS
VSS
VSS
VDD
VDDQ
DQB
DQB
D
E
DQC
DQC
VDDQ
VDD
VSS
VSS
VSS
VDD
VDDQ
DQB
DQB
E
F
DQC
DQC
VDDQ
VDD
VSS
VSS
VSS
VDD
VDDQ
DQB
DQB
F
G
DQC
DQC
VDDQ
VDD
VSS
VSS
VSS
VDD
VDDQ
DQB
DQB
G
H
VDDQ/
NC
MCL
NC
VDD
VSS
VSS
VSS
VDD
NC
ZQ
ZZ
H
J
DQD
DQD
VDDQ
VDD
VSS
VSS
VSS
VDD
VDDQ
DQA
DQA
J
K
DQD
DQD
VDDQ
VDD
VSS
VSS
VSS
VDD
VDDQ
DQA
DQA
K
L
DQD
DQD
VDDQ
VDD
VSS
VSS
VSS
VDD
VDDQ
DQA
DQA
L
M
DQD
DQD
VDDQ
VDD
VSS
VSS
VSS
VDD
VDDQ
DQA
DQA
M
N
DQD
SCD
VDDQ
VSS
NC
NC
NC
VSS
VDDQ
NC
DQA
N
P
NC
NC
A
A
TDI
A1
TDO
A
A
A
A17
P
R
LBO
NC
A
A
TMS
A0
TCK
A
A
A
A
R
11 x 15 Bump BGA—13mm x 15 mm Body—1.0 mm Bump Pitch
Rev: 1.04 3/2005
3/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
GS882V37 BGA Pin Description
Symbol
Type
Description
A 0, A 1
I
Address field LSBs and Address Counter Preset Inputs
A
I
Address Inputs
DQA
DQB
DQC
DQD
I/O
Data Input and Output pins
BA , BB , BC , BD
I
Byte Write Enable for DQA, DQB, DQC, DQD I/Os; active low
NC
—
No Connect
NC
—
No Connect
CK
I
Clock Input Signal; active high
BW
I
Byte Write—Writes all enabled bytes; active low
GW
I
Global Write Enable—Writes all bytes; active low
E1
I
Chip Enable; active low
E3
I
Chip Enable; active low
E2
I
Chip Enable; active high
G
I
Output Enable; active low
ADV
I
Burst address counter advance enable; active l0w
ADSC, ADSP
I
Address Strobe (Processor, Cache Controller); active low
ZZ
I
Sleep mode control; active high
LBO
I
Linear Burst Order mode; active low
PE
I
9th Bit Enable; active low (only on 119-bump BGA)
ZQ
I
FLXDrive Output Impedance Control (Low = Low Impedance [High Drive], High = High Impedance [Low
Drive])
TMS
I
Scan Test Mode Select
TDI
I
Scan Test Data In
TDO
O
Scan Test Data Out
TCK
I
Scan Test Clock
MCL
—
Must Connect Low
SCD
—
Single Cycle Deselect/Dual Cyle Deselect Mode Control
VDD
I
Core power supply
VSS
I
I/O and Core Ground
VDDQ
I
Output driver power supply
Rev: 1.04 3/2005
4/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
GS88237B Block Diagram
Register
A0–An
D
Q
A0
A0
D0
A1
Q0
A1
D1
Q1
Counter
Load
A
LBO
ADV
Memory
Array
CK
ADSC
ADSP
Q
D
Register
GW
BW
BA
D
Q
Register
D
36
Q
BB
36
4
Register
D
Q
D
Q
D
Register
Q
Q
Register
D
Register
BC
BD
Register
D
Q
Register
E1
E2
E3
D
Q
Register
D
Q
G
ZZ
Power Down
DQx1–DQx9
Control
Note: Only x36 version shown for simplicity.
Rev: 1.04 3/2005
5/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
Mode Pin Functions
Mode Name
Pin Name
Burst Order Control
LBO
Power Down Control
ZZ
Single/Dual Cycle Deselect Control
SCD
FLXDrive Output Impedance Control
ZQ
9th Bit Enable
PE
State
Function
L
Linear Burst
H
Interleaved Burst
L or NC
Active
H
Standby, IDD = ISB
L
Dual Cycle Deselect
H or NC
Single Cycle Deselect
L
High Drive (Low Impedance)
H or NC
Low Drive (High Impedance)
L
Activate DQPx I/Os (x18/x36 mode)
H or NC
Deactivate DQPx I/Os (x16/x32 mode)
Note:
There are pull-up devices onthe ZQ, SCD pins and a pull-down device on the ZZ pin, so those input pins can be unconnected and the chip will
operate in the default states as specified in the above tables.
Burst Counter Sequences
Linear Burst Sequence
Interleaved Burst Sequence
A[1:0] A[1:0] A[1:0] A[1:0]
A[1:0] A[1:0] A[1:0] A[1:0]
1st address
00
01
10
11
1st address
00
01
10
11
2nd address
01
10
11
00
2nd address
01
00
11
10
3rd address
10
11
00
01
3rd address
10
11
00
01
4th address
11
00
01
10
4th address
11
10
01
00
Note:
The burst counter wraps to initial state on the 5th clock.
Note:
The burst counter wraps to initial state on the 5th clock.
BPR 1999.05.18
Rev: 1.04 3/2005
6/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
Byte Write Truth Table
Function
GW
BW
BA
BB
BC
BD
Notes
Read
H
H
X
X
X
X
1
Read
H
L
H
H
H
H
1
Write byte a
H
L
L
H
H
H
2, 3
Write byte b
H
L
H
L
H
H
2, 3
Write byte c
H
L
H
H
L
H
2, 3, 4
Write byte d
H
L
H
H
H
L
2, 3, 4
Write all bytes
H
L
L
L
L
L
2, 3, 4
Write all bytes
L
X
X
X
X
X
Notes:
1. All byte outputs are active in read cycles regardless of the state of Byte Write Enable inputs.
2. Byte Write Enable inputs BA, BB, BC, and/or BD may be used in any combination with BW to write single or multiple bytes.
3. All byte I/Os remain High-Z during all write operations regardless of the state of Byte Write Enable inputs.
4. Bytes “C” and “D” are only available on the x36 version.
Rev: 1.04 3/2005
7/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
Simplified State Diagram
X
Deselect
W
R
Simple Burst Synchronous Operation
Simple Synchronous Operation
W
X
R
R
First Write
CW
First Read
CR
CR
W
X
R
R
X
Burst Write
Burst Read
X
CR
CW
CR
Notes:
1. The diagram shows only supported (tested) synchronous state transitions. The diagram presumes G is tied low.
2. The upper portion of the diagram assumes active use of only the Enable (E1) and Write (BA, BB, BC, BD, BW, and GW) control inputs, and
that ADSP is tied high and ADSC is tied low.
3. The upper and lower portions of the diagram together assume active use of only the Enable, Write, and ADSC control inputs and
assumes ADSP is tied high and ADV is tied low.
Rev: 1.04 3/2005
8/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
Simplified State Diagram with G
X
Deselect
W
R
W
X
R
R
First Write
CR
CW
W
CW
W
X
First Read
X
CR
R
Burst Write
R
CR
CW
W
Burst Read
X
CW
CR
Notes:
1. The diagram shows supported (tested) synchronous state transitions plus supported transitions that depend upon the use of G.
2. Use of “Dummy Reads” (Read Cycles with G High) may be used to make the transition from read cycles to write cycles without passing
through a Deselect cycle. Dummy Read cycles increment the address counter just like normal read cycles.
3. Transitions shown in grey tone assume G has been pulsed high long enough to turn the RAM’s drivers off and for incoming data to meet
Data Input Set Up Time.
Rev: 1.04 3/2005
9/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
Absolute Maximum Ratings
(All voltages reference to VSS)
Symbol
Description
Value
Unit
VDD
Voltage on VDD Pins
–0.5 to 4.6
V
VDDQ
Voltage in VDDQ Pins
–0.5 to 4.6
V
VCK
Voltage on Clock Input Pin
–0.5 to 6
V
VI/O
Voltage on I/O Pins
–0.5 to VDDQ +0.5 (≤ 4.6 V max.)
V
VIN
Voltage on Other Input Pins
–0.5 to VDD +0.5 (≤ 4.6 V max.)
V
IIN
Input Current on Any Pin
+/–20
mA
IOUT
Output Current on Any I/O Pin
+/–20
mA
PD
Package Power Dissipation
1.5
W
TSTG
Storage Temperature
–55 to 125
o
TBIAS
Temperature Under Bias
–55 to 125
o
C
C
Note:
Permanent damage to the device may occur if the Absolute Maximum Ratings are exceeded. Operation should be restricted to Recommended
Operating Conditions. Exposure to conditions exceeding the Absolute Maximum Ratings, for an extended period of time, may affect reliability of
this component.
Power Supply Voltage Ranges
Parameter
Symbol
Min.
Typ.
Max.
Unit
3.3 V Supply Voltage
VDD3
3.0
3.3
3.6
V
2.5 V Supply Voltage
VDD2
2.3
2.5
2.7
V
3.3 V VDDQ I/O Supply Voltage
VDDQ3
3.0
3.3
3.6
V
2.5 V VDDQ I/O Supply Voltage
VDDQ2
2.3
2.5
2.7
V
Notes
Notes:
1. The part numbers of Industrial Temperature Range versions end the character “I”. Unless otherwise noted, all performance specifications quoted are evaluated for worst case in the temperature range marked on the device.
2. Input Under/overshoot voltage must be –2 V > Vi < VDDn+2 V not to exceed 4.6 V maximum, with a pulse width not to exceed 20% tKC.
Rev: 1.04 3/2005
10/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
VDDQ3 Range Logic Levels
Parameter
Symbol
Min.
Typ.
Max.
Unit
Notes
VDD Input High Voltage
VIH
2.0
—
VDD + 0.3
V
1
VDD Input Low Voltage
VIL
–0.3
—
0.8
V
1
VDDQ I/O Input High Voltage
VIHQ
2.0
—
VDDQ + 0.3
V
1,3
VDDQ I/O Input Low Voltage
VILQ
–0.3
—
0.8
V
1,3
Notes:
1. The part numbers of Industrial Temperature Range versions end the character “I”. Unless otherwise noted, all performance specifications quoted are evaluated for worst case in the temperature range marked on the device.
2. Input Under/overshoot voltage must be –2 V > Vi < VDDn+2 V not to exceed 4.6 V maximum, with a pulse width not to exceed 20% tKC.
3. VIHQ (max) is voltage on VDDQ pins plus 0.3 V.
VDDQ2 Range Logic Levels
Parameter
Symbol
Min.
Typ.
Max.
Unit
Notes
VDD Input High Voltage
VIH
0.6*VDD
—
VDD + 0.3
V
1
VDD Input Low Voltage
VIL
–0.3
—
0.3*VDD
V
1
VDDQ I/O Input High Voltage
VIHQ
0.6*VDD
—
VDDQ + 0.3
V
1,3
VDDQ I/O Input Low Voltage
VILQ
–0.3
—
0.3*VDD
V
1,3
Notes:
1. The part numbers of Industrial Temperature Range versions end the character “I”. Unless otherwise noted, all performance specifications quoted are evaluated for worst case in the temperature range marked on the device.
2. Input Under/overshoot voltage must be –2 V > Vi < VDDn+2 V not to exceed 4.6 V maximum, with a pulse width not to exceed 20% tKC.
3. VIHQ (max) is voltage on VDDQ pins plus 0.3 V.
Recommended Operating Temperatures
Parameter
Symbol
Min.
Typ.
Max.
Unit
Notes
Ambient Temperature (Commercial Range Versions)
TA
0
25
70
°C
2
Ambient Temperature (Industrial Range Versions)
TA
–40
25
85
°C
2
Notes:
1. The part numbers of Industrial Temperature Range versions end the character “I”. Unless otherwise noted, all performance specifications quoted are evaluated for worst case in the temperature range marked on the device.
2. Input Under/overshoot voltage must be –2 V > Vi < VDDn+2 V not to exceed 4.6 V maximum, with a pulse width not to exceed 20% tKC.
Rev: 1.04 3/2005
11/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
Undershoot Measurement and Timing
Overshoot Measurement and Timing
VIH
20% tKC
VDD + 2.0 V
VSS
50%
50%
VDD
VSS – 2.0 V
20% tKC
VIL
Capacitance
(TA = 25oC, f = 1 MHZ, VDD = 2.5 V)
Parameter
Symbol
Test conditions
Typ.
Max.
Unit
Input Capacitance
CIN
VIN = 0 V
4
5
pF
Input/Output Capacitance
CI/O
VOUT = 0 V
6
7
pF
Note:
These parameters are sample tested.
AC Test Conditions
Parameter
Conditions
Input high level
VDD – 0.2 V
Input low level
0.2 V
Input slew rate
1 V/ns
Input reference level
VDD/2
Output reference level
VDDQ/2
Output load
Fig. 1
Notes:
1. Include scope and jig capacitance.
2. Test conditions as specified with output loading as shown in Fig. 1
unless otherwise noted.
3. Device is deselected as defined by the Truth Table.
Output Load 1
DQ
50Ω
30pF*
VDDQ/2
* Distributed Test Jig Capacitance
Rev: 1.04 3/2005
12/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
DC Electrical Characteristics
Parameter
Symbol
Test Conditions
Min
Max
Input Leakage Current
(except mode pins)
IIL
VIN = 0 to VDD
–1 uA
1 uA
ZZ Input Current
IIN1
VDD ≥ VIN ≥ VIH
0 V ≤ VIN ≤ VIH
–1 uA
–1 uA
1 uA
100 uA
Output Leakage Current
IOL
Output Disable, VOUT = 0 to VDD
–1 uA
1 uA
Output High Voltage
VOH2
IOH = –8 mA, VDDQ = 2.375 V
1.7 V
—
Output High Voltage
VOH3
IOH = –8 mA, VDDQ = 3.135 V
2.4 V
—
Output Low Voltage
VOL
IOL = 8 mA
—
0.4 V
Operating Currents
-333
-300
-250
-200
Symbol
0
to
70°C
–40
to
85°C
0
to
70°C
–40
to
85°C
0
to
70°C
–40
to
85°C
0
to
70°C
–40
to
85°C
Pipeline
IDD
IDDQ
380
55
390
55
345
50
355
50
290
40
300
40
240
30
250
30
mA
(x36)
Pipeline
IDD
IDDQ
380
55
390
55
345
05
355
50
290
40
300
40
240
30
250
30
mA
ZZ ≥ VDD – 0.2 V
—
Pipeline
ISB
40
50
40
50
40
50
40
50
mA
Device Deselected;
All other inputs
≥ VIH or ≤ VIL
—
Pipeline
IDD
85
90
80
85
85
90
75
80
mA
Parameter
Test Conditions
Operating
Current
Device Selected;
All other inputs
≥VIH or ≤ VIL
Output open
(x36)
Device Selected;
All other inputs
≥VIH or ≤ VIL
Output open
Standby
Current
Deselect
Current
3.3 V
Operating
Current
2.5 V
Mode
Unit
Notes:
1. IDD and IDDQ apply to any combination of VDD3, VDD2, VDDQ3, and VDDQ2 operation.
2. All parameters listed are worst case scenario.
Rev: 1.04 3/2005
13/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
AC Electrical Characteristics
Pipeline
Parameter
Symbol
Clock Cycle Time
-333
-300
-250
-200
Unit
Min
Max
Min
Max
Min
Max
Min
Max
tKC
3.0
—
3.3
—
4.0
—
5.0
—
ns
Clock to Output Valid
tKQ
—
2.0
—
2.2
—
2.3
—
2.7
ns
Clock to Output Invalid
tKQX
1.0
—
1.0
—
1.0
—
1.0
—
ns
Clock to Output in Low-Z
tLZ1
1.0
—
1.0
—
1.0
—
1.0
—
ns
Setup time
tS
1.0
—
1.1
—
1.2
—
1.4
—
ns
Hold time
tH
0
—
0.1
—
0.2
—
0.4
—
ns
G to Output Valid
tOE
—
2.0
—
2.2
—
2.3
—
2.5
ns
G to output in High-Z
tOHZ1
—
2.0
—
2.2
—
2.3
—
2.5
ns
Clock HIGH Time
tKH
1.3
—
1.3
—
1.3
—
1.3
—
ns
Clock LOW Time
tKL
1.5
—
1.5
—
1.5
—
1.5
—
ns
Clock to Output in
High-Z
tHZ1
1.0
2.0
1.0
2.2
1.5
2.3
1.5
3.0
ns
G to output in Low-Z
tOLZ1
0
—
0
—
0
—
0
—
ns
ZZ setup time
tZZS2
5
—
5
—
5
—
5
—
ns
ZZ hold time
tZZH2
1
—
1
—
1
—
1
—
ns
ZZ recovery
tZZR
20
—
20
—
20
—
20
—
ns
Notes:
1. These parameters are sampled and are not 100% tested.
2. ZZ is an asynchronous signal. However, in order to be recognized on any given clock cycle, ZZ must meet the specified setup and hold
times as specified above.
Rev: 1.04 3/2005
14/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
Pipeline Mode Timing (+1)
Begin
Read A
Cont
Cont
Deselect Write B
Read C
Read C+1 Read C+2 Read C+3 Cont
Deselect
tKC
tKH tKL
CK
ADSP
tS
ADSC initiated read
tH
ADSC
tS
tH
ADV
tS
tH
A0–An
A
B
C
tS
GW
tS
tH
BW
tH
tS
Ba–Bd
tS
Deselected with E1
tH
E1
tS
E2 and E3 only sampled with ADSC
tH
E2
tS
tH
E3
G
tS
tOE
DQa–DQd
Rev: 1.04 3/2005
tOHZ
Q(A)
tH
D(B)
tKQ
tLZ
tKQX
tHZ
Q(C)
Q(C+1)
15/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
Q(C+2)
Q(C+3)
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
Sleep Mode
During normal operation, ZZ must be pulled low, either by the user or by it’s internal pull down resistor. When ZZ is pulled high,
the SRAM will enter a Power Sleep mode after 2 cycles. At this time, internal state of the SRAM is preserved. When ZZ returns to
low, the SRAM operates normally after ZZ recovery time.
Sleep mode is a low current, power-down mode in which the device is deselected and current is reduced to ISB2. The duration of
Sleep mode is dictated by the length of time the ZZ is in a high state. After entering Sleep mode, all inputs except ZZ become
disabled and all outputs go to High-Z The ZZ pin is an asynchronous, active high input that causes the device to enter Sleep mode.
When the ZZ pin is driven high, ISB2 is guaranteed after the time tZZI is met. Because ZZ is an asynchronous input, pending
operations or operations in progress may not be properly completed if ZZ is asserted. Therefore, Sleep mode must not be initiated
until valid pending operations are completed. Similarly, when exiting Sleep mode during tZZR, only a Deselect or Read commands
may be applied while the SRAM is recovering from Sleep mode.
Sleep Mode Timing Diagram
tKH
tKC
tKL
CK
Setup
Hold
ADSP
ADSC
tZZR
tZZS
tZZH
ZZ
Application Tips
Single and Dual Cycle Deselect
SCD devices (like this one) force the use of “dummy read cycles” (read cycles that are launched normally, but that are ended with
the output drivers inactive) in a fully synchronous environment. Dummy read cycles waste performance, but their use usually
assures there will be no bus contention in transitions from reads to writes or between banks of RAMs. DCD SRAMs do not waste
bandwidth on dummy cycles and are logically simpler to manage in a multiple bank application (wait states need not be inserted at
bank address boundary crossings), but greater care must be exercised to avoid excessive bus contention.
JTAG Port Operation
Overview
The JTAG Port on this RAM operates in a manner that is compliant with IEEE Standard 1149.1-1990, a serial boundary scan
interface standard (commonly referred to as JTAG). The JTAG Port input interface levels scale with VDD. The JTAG output
drivers are powered by VDDQ.
Disabling the JTAG Port
It is possible to use this device without utilizing the JTAG port. The port is reset at power-up and will remain inactive unless
clocked. TCK, TDI, and TMS are designed with internal pull-up circuits.To assure normal operation of the RAM with the JTAG
Port unused, TCK, TDI, and TMS may be left floating or tied to either VDD or VSS. TDO should be left unconnected.
Rev: 1.04 3/2005
16/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
JTAG Port Registers
JTAG Pin Descriptions
Pin
Pin Name
I/O
Description
TCK
Test Clock
In
Clocks all TAP events. All inputs are captured on the rising edge of TCK and all outputs propagate
from the falling edge of TCK.
TMS
Test Mode Select
In
The TMS input is sampled on the rising edge of TCK. This is the command input for the TAP
controller state machine. An undriven TMS input will produce the same result as a logic one input
level.
In
The TDI input is sampled on the rising edge of TCK. This is the input side of the serial registers
placed between TDI and TDO. The register placed between TDI and TDO is determined by the
state of the TAP Controller state machine and the instruction that is currently loaded in the TAP
Instruction Register (refer to the TAP Controller State Diagram). An undriven TDI pin will produce
the same result as a logic one input level.
TDI
Test Data In
TDO
Test Data Out
Output that is active depending on the state of the TAP state machine. Output changes in
Out response to the falling edge of TCK. This is the output side of the serial registers placed between
TDI and TDO.
Note:
This device does not have a TRST (TAP Reset) pin. TRST is optional in IEEE 1149.1. The Test-Logic-Reset state is entered while TMS is
held high for five rising edges of TCK. The TAP Controller is also reset automaticly at power-up.
Overview
The various JTAG registers, refered to as Test Access Port orTAP Registers, are selected (one at a time) via the sequences of 1s
and 0s applied to TMS as TCK is strobed. Each of the TAP Registers is a serial shift register that captures serial input data on the
rising edge of TCK and pushes serial data out on the next falling edge of TCK. When a register is selected, it is placed between the
TDI and TDO pins.
Instruction Register
The Instruction Register holds the instructions that are executed by the TAP controller when it is moved into the Run, Test/Idle, or
the various data register states. Instructions are 3 bits long. The Instruction Register can be loaded when it is placed between the
TDI and TDO pins. The Instruction Register is automatically preloaded with the IDCODE instruction at power-up or whenever the
controller is placed in Test-Logic-Reset state.
Bypass Register
The Bypass Register is a single bit register that can be placed between TDI and TDO. It allows serial test data to be passed through
the RAM’s JTAG Port to another device in the scan chain with as little delay as possible.
Boundary Scan Register
The Boundary Scan Register is a collection of flip flops that can be preset by the logic level found on the RAM’s input or I/O pins.
The flip flops are then daisy chained together so the levels found can be shifted serially out of the JTAG Port’s TDO pin. The
Boundary Scan Register also includes a number of place holder flip flops (always set to a logic 1). The relationship between the
device pins and the bits in the Boundary Scan Register is described in the Scan Order Table following. The Boundary Scan
Register, under the control of the TAP Controller, is loaded with the contents of the RAMs I/O ring when the controller is in
Capture-DR state and then is placed between the TDI and TDO pins when the controller is moved to Shift-DR state. SAMPLE-Z,
SAMPLE/PRELOAD and EXTEST instructions can be used to activate the Boundary Scan Register.
Rev: 1.04 3/2005
17/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
JTAG TAP Block Diagram
·
·
·
·
·
·
Boundary Scan Register
·
·
0
Bypass Register
0
108
·
1
·
·
2 1 0
Instruction Register
TDI
TDO
ID Code Register
31 30 29
·
· · ·
2 1 0
Control Signals
TMS
TCK
Test Access Port (TAP) Controller
Identification (ID) Register
The ID Register is a 32-bit register that is loaded with a device and vendor specific 32-bit code when the controller is put in
Capture-DR state with the IDCODE command loaded in the Instruction Register. The code is loaded from a 32-bit on-chip ROM.
It describes various attributes of the RAM as indicated below. The register is then placed between the TDI and TDO pins when the
controller is moved into Shift-DR state. Bit 0 in the register is the LSB and the first to reach TDO when shifting begins.
Rev: 1.04 3/2005
18/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
Die
Revision
Code
GSI Technology
JEDEC Vendor
ID Code
I/O
Configuration
Not Used
Presence Register
Tap Controller Instruction Set
ID Register Contents
Bit #
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
0
x36
X
1
X
X
X
0
0
0
X
1
0
0
1
0
0
0
0
1
0
0
0
0
0 0 1 1 0 1 1 0 0 1
Overview
There are two classes of instructions defined in the Standard 1149.1-1990; the standard (Public) instructions, and device specific
(Private) instructions. Some Public instructions are mandatory for 1149.1 compliance. Optional Public instructions must be
implemented in prescribed ways. The TAP on this device may be used to monitor all input and I/O pads, and can be used to load
address, data or control signals into the RAM or to preload the I/O buffers.
When the TAP controller is placed in Capture-IR state the two least significant bits of the instruction register are loaded with 01.
When the controller is moved to the Shift-IR state the Instruction Register is placed between TDI and TDO. In this state the desired
instruction is serially loaded through the TDI input (while the previous contents are shifted out at TDO). For all instructions, the
TAP executes newly loaded instructions only when the controller is moved to Update-IR state. The TAP instruction set for this
device is listed in the following table.
Rev: 1.04 3/2005
19/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
JTAG Tap Controller State Diagram
1
0
Test Logic Reset
0
Run Test Idle
1
Select DR
1
Select IR
0
0
1
1
Capture DR
Capture IR
0
0
Shift DR
1
1
Shift IR
0
1
1
Exit1 DR
0
Exit1 IR
0
0
Pause DR
1
Exit2 DR
1
Update DR
1
1
0
0
Pause IR
1
Exit2 IR
0
1
0
0
Update IR
1
0
Instruction Descriptions
BYPASS
When the BYPASS instruction is loaded in the Instruction Register the Bypass Register is placed between TDI and TDO. This
occurs when the TAP controller is moved to the Shift-DR state. This allows the board level scan path to be shortened to facilitate testing of other devices in the scan path.
SAMPLE/PRELOAD
SAMPLE/PRELOAD is a Standard 1149.1 mandatory public instruction. When the SAMPLE / PRELOAD instruction is
loaded in the Instruction Register, moving the TAP controller into the Capture-DR state loads the data in the RAMs input and
I/O buffers into the Boundary Scan Register. Boundary Scan Register locations are not associated with an input or I/O pin, and
are loaded with the default state identified in the Boundary Scan Chain table at the end of this section of the datasheet. Because
the RAM clock is independent from the TAP Clock (TCK) it is possible for the TAP to attempt to capture the I/O ring contents
while the input buffers are in transition (i.e. in a metastable state). Although allowing the TAP to sample metastable inputs will
not harm the device, repeatable results cannot be expected. RAM input signals must be stabilized for long enough to meet the
TAPs input data capture set-up plus hold time (tTS plus tTH). The RAMs clock inputs need not be paused for any other TAP
operation except capturing the I/O ring contents into the Boundary Scan Register. Moving the controller to Shift-DR state then
places the boundary scan register between the TDI and TDO pins.
EXTEST
EXTEST is an IEEE 1149.1 mandatory public instruction. It is to be executed whenever the instruction register is loaded with
all logic 0s. The EXTEST command does not block or override the RAM’s input pins; therefore, the RAM’s internal state is
still determined by its input pins.
Rev: 1.04 3/2005
20/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
Typically, the Boundary Scan Register is loaded with the desired pattern of data with the SAMPLE/PRELOAD command.
Then the EXTEST command is used to output the Boundary Scan Register’s contents, in parallel, on the RAM’s data output
drivers on the falling edge of TCK when the controller is in the Update-IR state.
Alternately, the Boundary Scan Register may be loaded in parallel using the EXTEST command. When the EXTEST instruction is selected, the sate of all the RAM’s input and I/O pins, as well as the default values at Scan Register locations not associated with a pin, are transferred in parallel into the Boundary Scan Register on the rising edge of TCK in the Capture-DR
state, the RAM’s output pins drive out the value of the Boundary Scan Register location with which each output pin is associated.
IDCODE
The IDCODE instruction causes the ID ROM to be loaded into the ID register when the controller is in Capture-DR mode and
places the ID register between the TDI and TDO pins in Shift-DR mode. The IDCODE instruction is the default instruction
loaded in at power up and any time the controller is placed in the Test-Logic-Reset state.
SAMPLE-Z
If the SAMPLE-Z instruction is loaded in the instruction register, all RAM outputs are forced to an inactive drive state (highZ) and the Boundary Scan Register is connected between TDI and TDO when the TAP controller is moved to the Shift-DR
state.
RFU
These instructions are Reserved for Future Use. In this device they replicate the BYPASS instruction.
Rev: 1.04 3/2005
21/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
JTAG Port AC Test Conditions
Parameter
Conditions
Input high level
VDD – 0.2 V
Input low level
0.2 V
Input slew rate
1 V/ns
Input reference level
VDDQ/2
Output reference level
VDDQ/2
JTAG Port AC Test Load
DQ
50Ω
30pF*
VDDQ/2
* Distributed Test Jig Capacitance
Notes:
1. Include scope and jig capacitance.
2. Test conditions as shown unless otherwise noted.
JTAG TAP Instruction Set Summary
Instruction
Code
Description
EXTEST
000
Places the Boundary Scan Register between TDI and TDO.
1
IDCODE
001
Preloads ID Register and places it between TDI and TDO.
1, 2
SAMPLE-Z
010
Captures I/O ring contents. Places the Boundary Scan Register between TDI and
TDO.
Forces all RAM output drivers to High-Z.
1
RFU
011
Do not use this instruction; Reserved for Future Use.
Replicates BYPASS instruction. Places Bypass Register between TDI and TDO.
1
SAMPLE/
PRELOAD
100
Captures I/O ring contents. Places the Boundary Scan Register between TDI and
TDO.
1
GSI
101
GSI private instruction.
1
RFU
110
Do not use this instruction; Reserved for Future Use.
Replicates BYPASS instruction. Places Bypass Register between TDI and TDO.
1
BYPASS
111
Places Bypass Register between TDI and TDO.
Notes:
1. Instruction codes expressed in binary, MSB on left, LSB on right.
2. Default instruction automatically loaded at power-up and in test-logic-reset state.
Rev: 1.04 3/2005
22/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
Notes
1
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
JTAG Port Recommended Operating Conditions and DC Characteristics
Parameter
Symbol
Min.
Max.
Unit Notes
3.3 V Test Port Input High Voltage
VIHJ3
2.0
VDD3 +0.3
V
1
3.3 V Test Port Input Low Voltage
VILJ3
–0.3
0.8
V
1
2.5 V Test Port Input High Voltage
VIHJ2
0.6 * VDD2
VDD2 +0.3
V
1
2.5 V Test Port Input Low Voltage
VILJ2
–0.3
0.3 * VDD2
V
1
TMS, TCK and TDI Input Leakage Current
IINHJ
–300
1
uA
2
TMS, TCK and TDI Input Leakage Current
IINLJ
–1
100
uA
3
TDO Output Leakage Current
IOLJ
–1
1
uA
4
Test Port Output High Voltage
VOHJ
1.7
—
V
5, 6
Test Port Output Low Voltage
VOLJ
—
0.4
V
5, 7
Test Port Output CMOS High
VOHJC
VDDQ – 100 mV
—
V
5, 8
Test Port Output CMOS Low
VOLJC
—
100 mV
V
5, 9
Notes:
1. Input Under/overshoot voltage must be –2 V > Vi < VDDn +2 V not to exceed 4.6 V maximum, with a pulse width not to exceed 20% tTKC.
2. VILJ ≤ VIN ≤ VDDn
3. 0 V ≤ VIN ≤ VILJn
4. Output Disable, VOUT = 0 to VDDn
5. The TDO output driver is served by the VDDQ supply.
6. IOHJ = –4 mA
7. IOLJ = + 4 mA
8. IOHJC = –100 uA
9. IOHJC = +100 uA
JTAG Port Timing Diagram
tTKC
tTKH
tTKL
TCK
tTH
tTS
TDI
tTH
tTS
TMS
tTKQ
TDO
tTH
tTS
Parallel SRAM input
Rev: 1.04 3/2005
23/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
JTAG Port AC Electrical Characteristics
Parameter
Symbol
Min
Max
Unit
TCK Cycle Time
tTKC
50
—
ns
TCK Low to TDO Valid
tTKQ
—
20
ns
TCK High Pulse Width
tTKH
20
—
ns
TCK Low Pulse Width
tTKL
20
—
ns
TDI & TMS Set Up Time
tTS
10
—
ns
TDI & TMS Hold Time
tTH
10
—
ns
Boundary Scan (BSDL Files)
For information regarding the Boundary Scan Chain, or to obtain BSDL files for this part, please contact our Applications
Engineering Department at: [email protected].
Rev: 1.04 3/2005
24/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
Package Dimensions—119-Bump FPBGA (Package B, Variation 2)
TOP VIEW
A1
1
2
3
4
5
6
BOTTOM VIEW
A1
Ø0.10S C
Ø0.30S C AS B S
Ø0.60~0.90 (119x)
7
7 6 5 4 3 2 1
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
T
U
20.32
22±0.10
1.27
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
T
U
B
0.15 C
7.62
C
Rev: 1.04 3/2005
SEATING PLANE
A
0.20(4x)
14±0.10
0.50~0.70
1.86.±0.13
0.56±0.05
0.70±0.05
0.15 C
1.27
25/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
Package Dimensions—165-Bump FPBGA (Package D; Variation 1)
A1 CORNER
TOP VIEW
BOTTOM VIEW
Ø0.10 M C
Ø0.25 M C A B
Ø0.40~0.50 (165x)
1 2 3 4 5 6 7 8 9 10 11
A1 CORNER
11 10 9 8 7 6 5 4 3 2 1
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
1.0
14.0
15±0.07
1.0
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
A
1.0
1.0
0.15 C
B
C
Rev: 1.04 3/2005
SEATING PLANE
13±0.07
0.20(4x)
0.25~0.40
1.20 MAX.
(0.26)
0.45±0.05
0.25 C
10.0
26/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
Ordering Information for GSI Synchronous Burst RAMs
Org
Part Number1
Type
Package
Speed2
(MHz)
TA3
256K x 36
GS88237BB-333
S/DCD Pipeline
119 BGA (var. 2)
333
C
256K x 36
GS88237BB-300
S/DCD Pipeline
119 BGA (var. 2)
300
C
256K x 36
GS88237BB-250
S/DCD Pipeline
119 BGA (var. 2)
250
C
256K x 36
GS88237BB-200
S/DCD Pipeline
119 BGA (var. 2)
200
C
256K x 36
GS88237BB-333I
S/DCD Pipeline
119 BGA (var. 2)
333
I
256K x 36
GS88237BB-300I
S/DCD Pipeline
119 BGA (var. 2)
300
I
256K x 36
GS88237BB-250I
S/DCD Pipeline
119 BGA (var. 2)
250
I
256K x 36
GS88237BB-200I
S/DCD Pipeline
119 BGA (var. 2)
200
I
256K x 36
GS88237BD-333
S/DCD Pipeline
165 BGA (var. 1)
333
C
256K x 36
GS88237BD-300
S/DCD Pipeline
165 BGA (var. 1)
300
C
256K x 36
GS88237BD-250
S/DCD Pipeline
165 BGA (var. 1)
250
C
256K x 36
GS88237BD-200
S/DCD Pipeline
165 BGA (var. 1)
200
C
256K x 36
GS88237BD-333I
S/DCD Pipeline
165 BGA (var. 1)
333
I
256K x 36
GS88237BD-300I
S/DCD Pipeline
165 BGA (var. 1)
300
I
256K x 36
GS88237BD-250I
S/DCD Pipeline
165 BGA (var. 1)
250
I
256K x 36
GS88237BD-200I
S/DCD Pipeline
165 BGA (var. 1)
200
I
256K x 36
GS88237BGB-333
S/DCD Pipeline
Pb-Free 119 BGA (var. 2)
333
C
256K x 36
GS88237BGB-300
S/DCD Pipeline
Pb-Free 119 BGA (var. 2)
300
C
256K x 36
GS88237BGB-250
S/DCD Pipeline
Pb-Free 119 BGA (var. 2)
250
C
256K x 36
GS88237BGB-200
S/DCD Pipeline
Pb-Free 119 BGA (var. 2)
200
C
256K x 36
GS88237BGB-333I
S/DCD Pipeline
Pb-Free 119 BGA (var. 2)
333
I
256K x 36
GS88237BGB-300I
S/DCD Pipeline
Pb-Free 119 BGA (var. 2)
300
I
256K x 36
GS88237BGB-250I
S/DCD Pipeline
Pb-Free 119 BGA (var. 2)
250
I
256K x 36
GS88237BGB-200I
S/DCD Pipeline
Pb-Free 119 BGA (var. 2)
200
I
256K x 36
GS88237BGD-333
S/DCD Pipeline
Pb-Free 165 BGA (var. 1)
333
C
256K x 36
GS88237BGD-300
S/DCD Pipeline
Pb-Free 165 BGA (var. 1)
300
C
Status
Notes:
1. Customers requiring delivery in Tape and Reel should add the character “T” to the end of the part number. Example: GS88237BB-200IB.
2. TA = C = Commercial Temperature Range. TA = I = Industrial Temperature Range.
3. GSI offers other versions this type of device in many different configurations and with a variety of different features, only some of which are
covered in this data sheet. See the GSI Technology web site (www.gsitechnology.com) for a complete listing of current offerings.
Rev: 1.04 3/2005
27/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
Ordering Information for GSI Synchronous Burst RAMs
Org
Part Number1
Type
Package
Speed2
(MHz)
TA3
256K x 36
GS88237BGD-250
S/DCD Pipeline
Pb-Free 165 BGA (var. 1)
250
C
256K x 36
GS88237BGD-200
S/DCD Pipeline
Pb-Free 165 BGA (var. 1)
200
C
256K x 36
GS88237BGD-333I
S/DCD Pipeline
Pb-Free 165 BGA (var. 1)
333
I
256K x 36
GS88237BGD-300I
S/DCD Pipeline
Pb-Free 165 BGA (var. 1)
300
I
256K x 36
GS88237BGD-250I
S/DCD Pipeline
Pb-Free 165 BGA (var. 1)
250
I
256K x 36
GS88237BGD-200I
S/DCD Pipeline
Pb-Free 165 BGA (var. 1)
200
I
Status
Notes:
1. Customers requiring delivery in Tape and Reel should add the character “T” to the end of the part number. Example: GS88237BB-200IB.
2. TA = C = Commercial Temperature Range. TA = I = Industrial Temperature Range.
3. GSI offers other versions this type of device in many different configurations and with a variety of different features, only some of which are
covered in this data sheet. See the GSI Technology web site (www.gsitechnology.com) for a complete listing of current offerings.
Rev: 1.04 3/2005
28/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology
GS88237BB/D-333/300/250/200
9Mb Sync SRAM Datasheet Revision History
DS/DateRev. Code: Old;
New
Types of Changes
Format or Content
Page;Revisions;Reason
• Creation of new datasheet
88237B_r1
Content
• Corrected ordering information (incorrect speed bins
corrected)
88237B_r1_01;
88237B_r1_02
Content
• Updated entire format
• Added 165 BGA to entire document
• Removed Preliminary banner
• Removed 275 & 225 MHz speed bins
88237B_r1_02;
88237B_r1_03
Content
• Updated mechanical drawings and added variation numbers
to ordering information
88237B_r1_03;
88237B_r1_04
Content
• Added Pb-Free information
• Corrected block diagram (added E2 & E3 references)
• Added /PE information to pin description table
88237B_r1; 88237B_r1_01
Rev: 1.04 3/2005
29/29
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
© 2002, GSI Technology