FTS512K8/FTS512K8L
HIGH SPEED 512K x 8
STATIC CMOS RAM
FEATURES
High Speed (Equal Access and Cycle Times)
— 15/20/25 ns (Commercial)
— 20/25/35 ns (Industrial)
— 20/25/35/45/55/70 ns (Military)
Low Power
Single 5V±10% Power Supply
Easy Memory Expansion Using
CE
and
OE
Inputs
Common Data I/O
Three-State Outputs
Fully TTL Compatible Inputs and Outputs
Advanced CMOS Technology
Automatic Power Down
Packages
—36-Pin SOJ (400 mil)
—36-Pin FLATPACK
—36-Pin LCC (452 mil x 920 mil)
DESCRIPTION
The FTS512K8 is a 4 Megabit high-speed CMOS
static RAM organised as 512Kx8. The CMOS memory
requires no clocks or refreshing, and has equal access
and cycle times. Inputs are fully TTL-compatible. The
RAM operates from a single 5V±10% tolerance power
supply.
Access times as fast as 15 nanoseconds permit greatly
enhanced system operating speeds. CMOS is utilised
to reduce power consumption to a low level. The FTS512K8
is a member of a family of Force Ram's products offer-
ing fast access times.
The FTS512K8 device provides asynchronous operation
with matching access and cycle times. Memory loca-
tions are specified on address pins A
0
to A
18
. Reading is
accomplished by device selection (CE) and output en-
abling (OE) while write enable (WE) remains HIGH. By
presenting the address under these conditions, the data
in the addressed memory location is presented on the
data input/output pins. The input/output pins stay in the
HIGH Z state when either
CE
or
OE
is HIGH or
WE
is
LOW.
FUNCTIONAL BLOCK DIAGRAM
PIN CONFIGURATIONS
SOLDER-SEAL
FLATPACK (FS-4),
SOJ (J9, CJ2)
LCC (L11)
1519B
REV 1
1/12
2008
FTS512K8/FTS512K8L
MAXIMUM RATINGS
(1)
Symbol
V
CC
Parameter
Power Supply Pin with
Respect to GND
Terminal Voltage with
Respect to GND
(up to 7.0V)
Operating Temperature
Value
–0.5 to +7
–0.5 to
V
CC
+0.5
–55 to +125
Unit
V
Symbol
T
BIAS
T
STG
P
T
I
OUT
Parameter
Temperature Under
Bias
Storage Temperature
Power Dissipation
DC Output Current
Value
–55 to +125
–65 to +150
1.0
50
Unit
°C
°C
W
mA
V
TERM
T
A
V
°C
RECOMMENDED OPERATING
TEMPERATURE AND SUPPLY VOLTAGE
Grade(2)
Military
Industrial
Commercial
Ambient
Temperature
–55°C to +125°C
–40°C to +85°C
0°C to +70°C
GND
0V
0V
0V
V
CC
5.0V ± 10%
5.0V ± 10%
5.0V ± 10%
CAPACITANCES
(4)
V
CC
= 5.0V, T
A
= 25°C, f = 1.0MHz
Symbol
C
IN
C
OUT
Parameter
Input Capacitance
Conditions Typ. Unit
V
IN
= 0V
8
8
pF
pF
Output Capacitance V
OUT
= 0V
DC ELECTRICAL CHARACTERISTICS
Over recommended operating temperature and supply voltage
(2)
Symbol
V
IH
V
IL
V
HC
V
LC
V
OL
V
OH
Parameter
Input High Voltage
Input Low Voltage
CMOS Input High Voltage
CMOS Input Low Voltage
Output Low Voltage
(TTL Load)
Output High Voltage
(TTL Load)
Input Leakage Current
I
OL
= +8 mA, V
CC
= Min.
I
OH
= –4 mA, V
CC
= Min.
V
CC
= Max.
V
IN
= GND to V
CC
V
CC
= Max.,
CE
= V
IH
,
V
OUT
= GND to V
CC
Standby Power Supply
V
CC
= Max,
Ind./Com’l.
Current (TTL Input Levels) f = Max., Outputs Open
CE
≥
V
IH
Mil.
___
___
45
40
___
___
40
n/a
mA
Mil.
Ind./Com’l.
Mil.
Ind./Com’l.
2.4
–10
–5
–10
–5
+10
+5
+10
+5
Test Conditions
FTS512K8
Min
Max
V
CC
+0.3
2.2
FTS512K8L
Unit
Min
Max
V
CC
+0.3 V
2.2
V
V
V
V
V
+5
n/a
+5
n/a
µA
µA
0.8
0.8
–0.3
(3)
–0.3
(3)
V
CC
–0.2 V
CC
+0.3 V
CC
–0.2 V
CC
+0.3
–0.3
(3)
0.2
0.4
2.4
–5
n/a
–5
n/a
–0.3
(3)
0.2
0.4
I
LI
I
LO
Output Leakage Current
I
SB
CE
≥
V
HC
I
SB1
Standby Power Supply
Current
(CMOS Input Levels)
V
CC
= Max,
f = 0, Outputs Open
V
IN
≤
V
LC
or V
IN
≥
V
HC
Mil.
Ind./Com’l.
___
___
15
10
___
___
10
n/a
mA
N/A = Not Applicable
REV 1
2/12
2008
FTS512K8/FTS512K8L
DATA RETENTION CHARACTERISTICS (FTS512K8L Military Temperature Only)
Symbol
V
DR
I
CCDR
t
CDR
t
R †
*T
A
= +25°C
§t
RC
= Read Cycle Time
†
Parameter
V
CC
for Data Retention
Data Retention Current
Chip Deselect to
Data Retention Time
Operation Recovery Time
Test Conditons
Min
3.0
Typ.*
V
CC
= 3.0V
Max
V
CC
= 3.0V
Unit
V
CE
≥
V
CC
–0.2V,
V
IN
≥
V
CC
–0.2V
or V
IN
≤
0.2V
0
t
RC§
2
3
mA
ns
ns
This parameter is guaranteed but not tested.
DATA RETENTION WAVEFORM
POWER DISSIPATION CHARACTERISTICS VS. SPEED
Symbol
Parameter
Temperature
Range
Commercial
Industrial
Military
–15
220
N/A
N/A
–20
185
190
200
–25
180
185
195
–35
N/A
175
185
–45
N/A
N/A
175
–55
N/A
N/A
170
–70
N/A
N/A
165
Unit
mA
mA
mA
I
CC
Dynamic Operating Current*
*V
CC
= 5.5V. Tested with outputs open. f = Max. Switching inputs are 0V and 3V.
CE
= V
IL
,
OE
= V
IH
.
REV 1
3/12
2008
FTS512K8/FTS512K8L
AC ELECTRICAL CHARACTERISTICS—READ CYCLE
(V
CC
= 5V ± 10%, All Temperature Ranges)
(2)
Sym.
t
RC
t
AA
t
AC
t
OH
t
LZ
t
HZ
t
OE
t
OLZ
t
OHZ
t
PU
t
PD
Parameter
Read Cycle Time
Address Access Time
Chip Enable Access Time
Output Hold from Address
Change
Chip Enable to Output in
Low Z
Chip Disable to Output in
High Z
Output Enable Low to Data
Valid
Output Enable Low to Low Z
Output Enable High to High Z
Chip Enable to Power Up
Time
Chip Disable to Power Down
Time
0
0
3
3
-15
15
15
15
3
3
8
7
0
7
0
15
20
-20
25
20
20
3
3
9
9
0
9
0
20
-25
35
25
25
3
3
11
10
0
10
0
25
-35
45
35
35
3
3
15
15
0
15
0
35
-45
55
45
45
3
3
20
20
0
20
0
45
-55
70
55
55
3
3
25
25
0
25
0
55
-70
Unit
ns
Min Max Min Max Min Max Min Max Min Max Min Max Min Max
70
70
ns
ns
ns
ns
30
30
ns
ns
ns
30
ns
ns
70
ns
TIMING WAVEFORM OF READ CYCLE NO. 1 (OE CONTROLLED)
(5)
OE
REV 1
4/12
2008
FTS512K8/FTS512K8L
TIMING WAVEFORM OF READ CYCLE NO. 2 (ADDRESS CONTROLLED)
(5,6)
TIMING WAVEFORM OF READ CYCLE NO. 3 (CE CONTROLLED)
(5,7)
CE
Notes:
1. Stresses greater than those listed under MAXIMUM RATINGS may
cause permanent damage to the device. This is a stress rating only
and functional operation of the device at these or any other conditions
above those indicated in the operational sections of this specification
is not implied. Exposure to MAXIMUM rating conditions for extended
periods may affect reliability.
2. Extended temperature operation guaranteed with 400 linear feet per
minute of air flow.
3. Transient inputs with V
IL
and I
IL
not more negative than –2.0V and
–100mA, respectively, are permissible for pulse widths up to 20 ns.
4. This parameter is sampled and not 100% tested.
5.
WE
is HIGH for READ cycle.
6.
CE
is LOW and
OE
is LOW for READ cycle.
7. ADDRESS must be valid prior to, or coincident with
CE
transition LOW.
8. Transition is measured ± 200 mV from steady state voltage prior to
change, with loading as specified in Figure 1. This parameter is
sampled and not 100% tested.
9. Read Cycle Time is measured from the last valid address to the first
transitioning address.
REV 1
5/12
2008
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