Rev: 1.02 3/2002 1/14 © 2001, Giga Semiconductor, Inc.
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
GS74108ATP/J/X
512K x 8
4Mb Asynchronous SRAM
6, 7, 8, 10, 12 ns
3.3 V VDD
Center VDD and VSS
SOJ, TSOP, FP-BGA
Commercial Temp
Industrial Temp
Features
• Fast access time: 6, 7, 8, 10, 12 ns
• CMOS low power operation: 155/135/120/95/85 mA at
minimum cycle time
• Single 3.3 V power supply
• All inputs and outputs are TTL-compatible
• Fully static operation
• Industrial Temperature Option: –40° to 85°C
• Package line up
J: 400 mil, 36-pin SOJ package
TP: 400 mil, 44-pin TSOP Type II package
X: 6 mm x 10 mm Fine Pitch Ball Grid Array
package
Description
The GS74108A is a high speed CMOS Static RAM organized
as 524,288 words by 8 bits. Static design eliminates the need
for external clocks or timing strobes. The GS74108A operates
on a single 3.3 V power supply and all inputs and outputs are
TTL-compatible. The GS74108A is available in 400 mil SOJ,
400 mil TSOP Type-II, and 6 mm x 10 mm FP-BGA packages.
Pin Descriptions
SOJ 512K x 8-Pin Configuration
FP-BGA 256K x 16 Bump Configuration (Package X)
6 x 10 mm Bump Pitch
Symbol Description
A0–A18 Address input
DQ1–DQ8Data input/output
CE Chip enable input
WE Write enable input
OE Output enable input
VDD +3.3 V power supply
VSS Ground
NC No connect
123456
ALB
OE A0A1A2NC
BDQ
16 UB A3A4CE DQ1
CDQ
14 DQ15 A5A6DQ2DQ3
DV
SS DQ13 A17 A7DQ4VDD
EV
DD DQ12 NC A16 DQ5VSS
FDQ
11 DQ10 A8A9DQ7DQ6
GDQ
9NC A10 A11 WE DQ8
HNCA
12 A13 A14 A15 NC
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
A4
A3
A2
A1
A0
CE
DQ1
DQ2
VDD
VSS
DQ3
DQ4
WE
A17
A16
A15
NC
A5
A6
A7
A8
OE
DQ8
DQ7
VSS
VDD
DQ6
DQ5
A9
A10
A11
A12
36-pin
400 mil SOJ
17
18
A14
A13
20
19 NC
A18
Rev: 1.02 3/2002 2/14 © 2001, Giga Semiconductor, Inc.
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
GS74108ATP/J/X
TSOP-II 512K x 8-Pin Configuration
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
A4
A3
A2
A1
A0
CE
DQ1
DQ2
VDD
VSS
DQ3
DQ4
WE
NC
A5
A6
A7
A8
OE
DQ8
DQ7
VSS
VDD
DQ6
DQ5
A10
A11
A12
A18
44-pin
400 mil TSOP II
19
20
26
25 NC
21
22
NC
NC
24
23
NC
NC
1
2
NC
NC
44
43
NC
NC
A9
A13
A17
A16
A15
A14
Memory Array
Row
Decoder
Column
Decoder
Address
Input
Buffer
Control I/O Buffer
A0
CE
WE
OE
DQ1
A18
Block Diagram
DQ8
Rev: 1.02 3/2002 3/14 © 2001, Giga Semiconductor, Inc.
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
GS74108ATP/J/X
Note: X: “H” or “L”
Note:
Permanent device damage may occur if Absolute Maximum Ratings are exceeded. Functional operation shall be restricted to Rec-
ommended Operating Conditions. Exposure to higher than recommended voltages for extended periods of time could affect device
reliability.
Truth Table
CE OE WE DQ1 to DQ8VDD Current
H X X Not Selected ISB1, ISB2
L L H Read
IDD
LX L Write
LH H High Z
Absolute Maximum Ratings
Parameter Symbol Rating Unit
Supply Voltage VDD –0.5 to +4.6 V
Input Voltage VIN –0.5 to VDD +0.5
(≤ 4.6 V max.) V
Output Voltage VOUT –0.5 to VDD +0.5
(≤ 4.6 V max.) V
Allowable power dissipation PD 0.7 W
Storage temperature TSTG –55 to 150 oC
Rev: 1.02 3/2002 4/14 © 2001, Giga Semiconductor, Inc.
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
GS74108ATP/J/X
Note:
1. Input overshoot voltage should be less than VDD +2 V and not exceed 20 ns.
2. Input undershoot voltage should be greater than –2 V and not exceed 20 ns.
Notes:
1. Tested at TA = 25°C, f = 1 MHz
2. These parameters are sampled and are not 100% tested.
Recommended Operating Conditions
Parameter Symbol Min Typ Max Unit
Supply Voltage for -7/-8/-10/-12 VDD 3.0 3.3 3.6 V
Supply Voltage for -6 VDD 3.135 3.3 3.6 V
Input High Voltage VIH 2.0 — VDD +0.3 V
Input Low Voltage VIL –0.3 — 0.8 V
Ambient Temperature,
Commercial Range TAc 0—70
oC
Ambient Temperature,
Industrial Range TAI–40 — 85 oC
Capacitance
Parameter Symbol Test Condition Max Unit
Input Capacitance CIN VIN = 0 V 5 pF
Output Capacitance COUT VOUT = 0 V 7 pF
DC I/O Pin Characteristics
Parameter Symbol Test Conditions Min Max
Input Leakage
Current IIL VIN = 0 to VDD – 1 uA 1 uA
Output Leakage
Current ILO Output High Z
VOUT = 0 to VDD –1 uA 1 uA
Output High Voltage VOH IOH = –4 mA 2.4 —
Output Low Voltage VOL ILO = +4 mA — 0.4 V
Rev: 1.02 3/2002 5/14 © 2001, Giga Semiconductor, Inc.
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
GS74108ATP/J/X
AC Test Conditions
Power Supply Currents
Parameter Symbol Test Conditions
0 to 70°C –40 to 85°C
6 ns 7 ns 8 ns 10 ns 12 ns 6 ns 7 ns 8 ns 10 ns 12 ns
Operating
Supply
Current
IDD
CE ≤ VIL
All other inputs
≥ VIH or ≤ VIL
Min. cycle time
IOUT = 0 mA
155 mA 135 mA 120 mA 95 mA 85 mA 165 mA 145 mA 130 mA 105 mA 95 mA
Standby
Current ISB1
CE ≥ VIH
All other inputs
≥ VIH or ≤VIL
Min. cycle time
40 mA 35 mA 30 mA 25 mA 22 mA 50 mA 45 mA 40 mA 35 mA 32 mA
Standby
Current ISB2
CE ≥ VDD - 0.2V
All other inputs
≥ VDD - 0.2V or ≤
0.2V
10 mA 20 mA
DQ
VT = 1.4 V
50Ω30pF1
DQ
3.3 V
Output Load 1
Output Load 2
589Ω
434Ω
5pF1
Note:
1. Include scope and jig capacitance.
2. Test conditions as specified with output loading as shown in Fig. 1
unless otherwise noted.
3. Output load 2 for tLZ, tHZ, tOLZ and tOHZ
Parameter Conditions
Input high level VIH = 2.4 V
Input low level VIL = 0.4 V
Input rise time tr = 1 V/ns
Input fall time tf = 1 V/ns
Input reference level 1.4 V
Output reference level 1.4 V
Output load Fig. 1& 2
Rev: 1.02 3/2002 6/14 © 2001, Giga Semiconductor, Inc.
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
GS74108ATP/J/X
AC Characteristics
* These parameters are sampled and are not 100% tested.
Read Cycle 1: CE = OE = VIL, WE = VIH
Read Cycle
Parameter Symbol
-6 -7 -8 -10 -12
Unit
Min Max Min Max Min Max Min Max Min Max
Read cycle time tRC 6—7—8 —10—12— ns
Address access time tAA — 6 — 7 — 8 — 10 — 12 ns
Chip enable access time (CE)t
AC — 6 — 7 — 8 — 10 — 12 ns
Output enable to output valid (OE)t
OE —3—3—3.5— 4 — 5 ns
Output hold from address change tOH 3—3—3 — 3 — 3 — ns
Chip enable to output in low Z (CE)tLZ*3—3—3 — 3 — 3 — ns
Output enable to output in low Z (OE)tOLZ*0—0—0 — 0 — 0 — ns
Chip disable to output in High Z (CE)tHZ*—3—3.5—4—5—6 ns
Output disable to output in High Z (OE)tOHZ*—3—3—3.5— 4 — 5 ns
tAA
tOH
tRC
Address
Data Out Previous Data Data valid
Rev: 1.02 3/2002 7/14 © 2001, Giga Semiconductor, Inc.
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
GS74108ATP/J/X
Read Cycle 2: WE = VIH
* These parameters are sampled and are not 100% tested.
Write Cycle
Parameter Symbol
-6 -7 -8 -10 -12
Unit
Min Max Min Max Min Max Min Max Min Max
Write cycle time tWC 6 — 7 — 8 — 10 — 12 — ns
Address valid to end of write tAW 5 — 5 — 5.5 — 7 — 8 — ns
Chip enable to end of write tCW 5 — 5 — 5.5 — 7 — 8 — ns
Data set up time tDW 3 — 3.5 — 4 — 5 — 6 — ns
Data hold time tDH 0 — 0 — 0 — 0 — 0 — ns
Write pulse width tWP 5 — 5 — 5.5 — 7 — 8 — ns
Address set up time tAS 0 — 0 — 0 — 0 — 0 — ns
Write recovery time (WE) tWR 0—0—0—0—0— ns
Write recovery time (CE) tWR1 0 —0—0 — 0 — 0 — ns
Output Low Z from end of write tWLZ*3—3—3—3—3—ns
Write to output in High Z tWHZ*—3—3—3.5—4—5 ns
tAA
tRC
Address
tAC
tLZ
tOE
tOLZ
CE
OE
Data Out
tHZ
tOHZ
DATA VALID
High impedance
Rev: 1.02 3/2002 8/14 © 2001, Giga Semiconductor, Inc.
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
GS74108ATP/J/X
Write Cycle 1: WE control
Write Cycle 2: CE control
tWC
Address
CE
WE
Data In
OE
Data Out
tAW
tCW
tAS tWP
tWR
tDW tDH
tWLZtWHZ
DATA VALID
HIGH IMPEDANCE
tWC
Address
CE
WE
Data In
OE
Data Out
tAW
tWP
tAS tCW
tWR1
tDW tDH
DATA VALID
HIGH IMPEDANCE
Rev: 1.02 3/2002 9/14 © 2001, Giga Semiconductor, Inc.
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
GS74108ATP/J/X
36-Pin SOJ, 400 mil
1e
B1
D
A1 A2
y
E
HE
Q
c
L
GE
Detail A
A
B
A
Notes:
1. Dimension D& E do not include interlead flash.
2. Dimension B1 does not include dambar protrusion/intrusion.
3. Controlling dimension: inches
Symbol
Dimension in inch Dimension in mm
min nom max min nom max
A — — 0.146 — — 3.70
A1 0.026 — — 0.66 — —
A2 0.105 0.110 0.115 2.67 2.80 2.92
B 0.013 0.017 0.021 0.33 0.43 0.53
B1 0.024 0.028 0.032 0.61 0.71 0.81
c 0.006 0.008 0.012 0.15 0.20 0.30
D 0.920 0.924 0.929 23.37 23.47 23.60
E 0.395 0.400 0.405 10.04 10.16 10.28
e — 0.05 — — 1.27 —
HE0.430 0.435 0.440 10.93 11.05 11.17
GE0.354 0.366 0.378 9.00 9.30 9.60
L 0.082 — — 2.08 — —
y — — 0.004 — — 0.10
Q0o—10o0o—10o
Rev: 1.02 3/2002 10/14 © 2001, Giga Semiconductor, Inc.
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
GS74108ATP/J/X
44-Pin, 400 mil TSOP-II
D
122
2344
eB
Q
A
A1 A2
y
c
Detail A
E
HE
L
L1
A
Notes:
1. Dimension D& E do not include interlead flash.
2. Dimension B does not include dambar protrusion/intrusion.
3. Controlling dimension: mm
Symbol
Dimension in inch Dimension in mm
min nom max min nom max
A — — 0.047 — — 1.20
A1 0.002 — — 0.05 — —
A2 0.037 0.039 0.041 0.95 1.00 1.05
B 0.01 0.014 0.018 0.25 0.35 0.45
c — 0.006 — — 0.15 —
D 0.721 0.725 0.729 18.31 18.41 18.51
E 0.396 0.400 0.404 10.06 10.16 10.26
e — 0.031 — — 0.80 —
HE0.455 0.463 0.471 11.56 11.76 11.96
L 0.016 0.020 0.024 0.40 0.50 0.60
L1 — 0.031 — — 0.80 —
y — — 0.004 — — 0.10
Q0o—5o0o—5o
Rev: 1.02 3/2002 11/14 © 2001, Giga Semiconductor, Inc.
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
GS74108ATP/J/X
6 mm x 10 mm FP-BGA
Pin A1
Index
A1
E
Top View
Side View
D
A
aaa
Pin A1
Index
E1
Bottom View
D1
c
e
e
Solder Ball
fb
Symbol Unit: mm
A 1.10±0.10
A1 0.20~0.30
fbf0.30~0.40
c 0.36(TYP)
D 10.0±0.05
D1 5.25
E 6.0±0.05
E1 3.75
e 0.75(TYP)
aaa 0.10
A B C D E F G H
1
2
3
4
5
6
Rev: 1.02 3/2002 12/14 © 2001, Giga Semiconductor, Inc.
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
GS74108ATP/J/X
Ordering Information
Part Number*Package Access Time Temp. Range Status
GS74108ATP-6 400 mil TSOP-II 6 ns Commercial
GS74108ATP-7 400 mil TSOP-II 7 ns Commercial
GS74108ATP-8 400 mil TSOP-II 8 ns Commercial
GS74108ATP-10 400 mil TSOP-II 10 ns Commercial
GS74108ATP-12 400 mil TSOP-II 12 ns Commercial
GS74108ATP-6I 400 mil TSOP-II 6 ns Industrial
GS74108ATP-7I 400 mil TSOP-II 7 ns Industrial
GS74108ATP-8I 400 mil TSOP-II 8 ns Industrial
GS74108ATP-10I 400 mil TSOP-II 10 ns Industrial
GS74108ATP-12I 400 mil TSOP-II 12 ns Industrial
GS74108AJ-6 400 mil SOJ 6 ns Commercial
GS74108AJ-7 400 mil SOJ 7 ns Commercial
GS74108AJ-8 400 mil SOJ 8 ns Commercial
GS74108AJ-10 400 mil SOJ 10 ns Commercial
GS74108AJ-12 400 mil SOJ 12 ns Commercial
GS74108AJ-6I 400 mil SOJ 6 ns Industrial
GS74108AJ-7I 400 mil SOJ 7 ns Industrial
GS74108AJ-8I 400 mil SOJ 8 ns Industrial
GS74108AJ-10I 400 mil SOJ 10 ns Industrial
GS74108AJ-12I 400 mil SOJ 12 ns Industrial
GS74108AX-6 6 mm x 10 mm FP-BGA 6 ns Commercial
GS74108AX-7 6 mm x 10 mm FP-BGA 7 ns Commercial
Rev: 1.02 3/2002 13/14 © 2001, Giga Semiconductor, Inc.
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
GS74108ATP/J/X
* Customers requiring delivery in Tape and Reel should add the character “T” to the end of the part number. For example:
GS74108ATP-8T
GS74108AX-8 6 mm x 10 mm FP-BGA 8 ns Commercial
GS74108AX-10 6 mm x 10 mm FP-BGA 10 ns Commercial
GS74108AX-12 6 mm x 10 mm FP-BGA 12 ns Commercial
GS74108AX-6I 6 mm x 10 mm FP-BGA 6 ns Industrial
GS74108AX-7I 6 mm x 10 mm FP-BGA 7 ns Industrial
GS74108AX-8I 6 mm x 10 mm FP-BGA 8 ns Industrial
GS74108AX-10I 6 mm x 10 mm FP-BGA 10 ns Industrial
GS74108AX-12I 6 mm x 10 mm FP-BGA 12 ns Industrial
Ordering Information
Part Number*Package Access Time Temp. Range Status
Rev: 1.02 3/2002 14/14 © 2001, Giga Semiconductor, Inc.
Specifications cited are subject to change without notice. For latest documentation see http://www.gsitechnology.com.
GS74108ATP/J/X
4 M Asynchronous Datasheet Revision History
Rev. Code: Old;
New
Types of Changes
Format or Content Page #/Revisions/Reason
74108A_r1 Format/Content • Creation of new datasheet
74108A_r1; 74108A_r1_01 Content • Added 6 ns speed bin
• Updated all power numbers
74108A_r1_01; 74108A_r1_02 Content
• Updated Recommended Operating Conditions table on page 4
• Added 7 ns bin to entire document
• Added X package
