IDT IDT70V9379L9PRFI High-speed 3.3v 32k x 18 synchronous pipelined dual-port static ram Datasheet

IDT70V9379L
HIGH-SPEED 3.3V 32K x 18
SYNCHRONOUS PIPELINED
DUAL-PORT STATIC RAM
Features:
◆
◆
◆
◆
◆
◆
◆
True Dual-Ported memory cells which allow simultaneous
access of the same memory location
High-speed clock to data access
– Commercial: 7.5/9/12ns (max.)
Low-power operation
– IDT70V9379L
Active: 500mW (typ.)
Standby: 1.5mW (typ.)
Flow-Through or Pipelined output mode on either port via
the FT/PIPE pins
Counter enable and reset features
Dual chip enables allow for depth expansion without
additional logic
◆
◆
◆
◆
Full synchronous operation on both ports
– 4ns setup to clock and 0ns hold on all control, data, and
address inputs
– Data input, address, and control registers
– Fast 7.5ns clock to data out in the Pipelined output mode
– Self-timed write allows fast cycle time
– 12ns cycle time, 83MHz operation in Pipelined output mode
Separate upper-byte and lower-byte controls for
multiplexed bus and bus matching compatibility
LVTTL- compatible, single 3.3V (±0.3V) power supply
Industrial temperature range (–40°C to +85°C) is
available for selected speeds
Available in a 128-pin Thin Quad Flatpack (TQFP)
Functional Block Diagram
R/WL
R/WR
UBL
UBR
CE0L
1
0
0/1
CE1L
CE0R
1
0
0/1
CE1R
LBL
OEL
LBR
OER
FT/PIPEL
0/1
1b 0b
b a
0a 1a
1a 0a
I/O9L-I/O17L
a
b
0b 1b
0/1
FT/PIPER
I/O9R-I/O17R
I/O
Control
I/O
Control
I/O0L-I/O8L
I/O0R-I/O8R
A14R
A14L
A0L
CLKL
ADSL
CNTENL
CNTRSTL
Counter/
Address
Reg.
MEMORY
ARRAY
Counter/
Address
Reg.
A0R
CLKR
ADSR
CNTENR
CNTRSTR
4857 drw 01
JANUARY 2001
1
©2000 Integrated Device Technology, Inc.
DSC-4857/2
IDT70V9379L
High-Speed 32K x 18 Dual-Port Synchronous Pipelined Static RAM
Industrial and Commercial Temperature Ranges
Description:
The IDT70V9379 is a high-speed 32K x 18 bit synchronous
Dual-Port RAM. The memory array utilizes Dual-Port memory cells
to allow simultaneous access of any address from both ports.
Registers on control, data, and address inputs provide minimal setup
and hold times. The timing latitude provided by this approach allows
systems to be designed with very short cycle times.
With an input data register, the IDT70V9379 has been optimized for
applications having unidirectional or bidirectional data flow in bursts. An
automatic power down feature, controlled by CE0 and CE1, permits the
on-chip circuitry of each port to enter a very low standby power mode.
Fabricated using IDT’s CMOS high-performance technology, these
devices typically operate on only 500mW of power.
70V9379PRF
PK-128-1(4)
128-Pin TQFP
Top View(5)
102
101
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
A10L
A11L
A12L
A13L
A14L
NC
NC
NC
LBL
UBL
CE0L
CE1L
CNTRSTL
VCC
GND
R/WL
OEL
FT/PIPEL
GND
I/O17L
I/O16L
I/O15L
I/O14L
VCC
GND
I/O13L
NC
NC
NC
NC
A9R
A8R
A7R
A6R
A5R
A4R
A3R
A2R
A1R
A0R
NC
CNTENR
CLKR
ADSR
GND
VCC
ADSL
CLKL
CNTENL
NC
A0L
A1L
A2L
A3L
A4L
A5L
A6L
A7L
A8L
A9L
NC
NC
NC
NC
128
127
126
125
124
123
122
121
120
119
118
117
116
115
114
113
112
111
110
109
108
107
106
105
104
103
A 10R
A 11R
A 12R
A 13R
A 14R
NC
NC
NC
LBR
UB R
CE 0R
CE 1R
CNTRSTR
V CC
GND
R/WR
OE R
FT/PIPER
GND
I/O17R
I/O16R
I/O15R
I/O14R
V CC
V CC
I/O13R
Pin Configuration(1,2,3)
NOTES:
1. All Vcc pins must be connected to power supply.
2. All GND pins must be connected to ground.
3. Package body is approximately 14mm x 20mm x 1.4mm.
4. This package code is used to reference the package diagram.
5. This text does not indicate orientation of the actual part-marking.
6.42
2
I/O12R
I/O11R
GND
NC
I/O10R
I/O9R
I/O8R
I/O7R
VCC
I/O6R
I/O5R
I/O4R
GND
I/O3R
VCC
I/O2R
I/O1R
I/O0R
GND
VCC
I/O0L
I/O1L
GND
I/O2L
I/O3L
GND
I/O4L
I/O5L
I/O6L
I/O7L
VCC
I/O8L
I/O9L
I/O10L
NC
VCC
I/O11L
I/O12L
4857 drw 02
IDT70V9379L
High-Speed 32K x 18 Dual-Port Synchronous Pipelined Static RAM
Industrial and Commercial Temperature Ranges
Pin Names
Left Port
Right Port
Names
CE0L, CE1L
CE0R, CE1R
Chip Enables
R/WL
R/WR
Read/Write Enable
OEL
OER
Output Enable
A0L - A14L
A0R - A14R
Address
I/O0L - I/O17L
I/O0R - I/O17R
Data Input/Output
CLKL
CLKR
Clock
UBL
UBR
Upper Byte Select
LBL
LBR
Lower Byte Select
ADSL
ADSR
Address Strobe Enable
CNTENL
CNTENR
Counter Enable
CNTRSTL
CNTRSTR
Counter Reset
FT/PIPEL
FT/PIPER
Flow-Through / Pipeline
VCC
Power
GND
Ground
4857 tbl 01
Truth Table I—Read/Write and Enable Control(1,2,3)
OE
CLK
CE0
CE1
UB
LB
R/W
Upper Byte
I/O9-17
Lower Byte
I/O0-8
X
↑
H
X
X
X
X
High-Z
High-Z
Deselected–Power Down
X
↑
X
L
X
X
X
High-Z
High-Z
Deselected–Power Down
X
↑
L
H
H
H
X
High-Z
High-Z
Both Bytes Deselected
X
↑
L
H
L
H
L
DATAIN
High-Z
Write to Upper Byte Only
X
↑
L
H
H
L
L
High-Z
DATAIN
Write to Lower Byte Only
X
↑
L
H
L
L
L
DATAIN
DATAIN
Write to Both Bytes
L
↑
L
H
L
H
H
DATAOUT
High-Z
Read Upper Byte Only
L
↑
L
H
H
L
H
High-Z
DATAOUT
Read Lower Byte Only
L
↑
L
H
L
L
H
DATAOUT
DATAOUT
Read Both Bytes
H
X
L
H
L
L
X
High-Z
High-Z
Outputs Disabled
MODE
4857 tbl 02
NOTES:
1. "H" = VIH, "L" = VIL, "X" = Don't Care.
2. ADS, CNTEN, CNTRST = X.
3. OE is an asynchronous input signal.
6.42
3
IDT70V9379L
High-Speed 32K x 18 Dual-Port Synchronous Pipelined Static RAM
Industrial and Commercial Temperature Ranges
Truth Table II—Address Counter Control(1,2,6)
Address
Previous
Address
Addr
Used
CLK
ADS
CNTEN
CNTRST
I/O(3)
X
X
0
↑
X
X
L
DI/O(0)
Counte r Reset to Address 0
An
X
An
↑
L(4)
X
H
DI/O(n)
External Address Loaded into Counter
An
Ap
Ap
↑
H
H
H
DI/O(p)
External Address Blocked—Counter disabled (Ap reused)
Ap + 1
↑
X
Ap
(5)
H
L
H
MODE
DI/O(p+1) Counter Enabled—Internal Address generation
4857 tbl 03
NOTES:
1. "H" = VIH, "L" = V IL, "X" = Don't Care.
2. CE 0, LB, UB, and OE = VIL; CE1 and R/W = VIH.
3. Outputs configured in Flow-Through Output mode; if outputs are in Pipelined mode the data out will be delayed by one cycle.
4. ADS is independent of all other signals including CE0, CE1, UB and LB.
5. The address counter advances if CNTEN = VIL on the rising edge of CLK, regardless of all other signals including CE0, CE1, UB and LB.
6. While an external address is being loaded (ADS = VIL), R/W = VIH is recommended to ensure data is not written arbitrarily.
Recommended DC Operating
Conditions
Recommended Operating
Temperature and Supply Voltage(1)
Grade
Commercial
Industrial
Symbol
Ambient
Temperature(2)
GND
Vcc
0OC to +70OC
0V
3.3V + 0.3V
-40OC to +85OC
0V
3.3V + 0.3V
Parameter
VCC
Supply Voltage
GND
Ground
VIH
Input High Voltage
Min.
Typ.
Max.
Unit
3.0
3.3
3.6
V
0
0
0
2.0V
____
4857 tbl 04
NOTES:
1. Industrial temperature: for specific speeds, packages and powers contact your
sales office.
2. This is the parameter TA. This is the "instant on" case temperature.
Absolute Maximum Ratings(1)
Symbol
Commercial
& Industrial
Unit
Terminal Voltage
with Respect to
GND
-0.5 to +4.6
V
Temperature
Under Bias
-55 to +125
TSTG
Storage
Temperature
-55 to +150
IOUT
DC Output Current
TBIAS
Input Low Voltage
VCC+0.3V
____
-0.3
0.8
V
V
4857 tbl 05
NOTES:
1. VIL > -1.5V for pulse width less than 10 ns.
2. VTERM must not exceed V CC +0.3V.
Capacitance(1)
Rating
VTERM(2)
VIL
(1)
V
(2)
(TA = +25°C, f = 1.0MHZ)
Symbol
CIN
Input Capacitance
(3)
o
COUT
C
Parameter
Output Capacitance
Conditions(2)
Max.
Unit
VIN = 3dV
9
pF
VOUT = 3dV
10
pF
4857 tbl 07
50
o
C
mA
4857 tbl 06
NOTES:
1. Stresses greater than those listed under ABSOLUTE 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 absolute
maximum rating conditions for extended periods may affect reliability.
2. VTERM must not exceed VCC +0.3V for more than 25% of the cycle time or 10ns
maximum, and is limited to < 20mA for the period of VTERM > VCC + 0.3V.
NOTES:
1. These parameters are determined by device characterization, but are not
production tested.
2. 3dV references the interpolated capacitance when the input and output switch
from 0V to 3V or from 3V to 0V.
3. COUT also references C I/O.
6.42
4
IDT70V9379L
High-Speed 32K x 18 Dual-Port Synchronous Pipelined Static RAM
Industrial and Commercial Temperature Ranges
DC Electrical Characteristics Over the Operating
Temperature and Supply Voltage Range (VCC = 3.3V ± 0.3V)
70V9379L
Symbol
|ILI|
|ILO|
Parameter
Test Conditions
Min.
Max.
Unit
Input Leakage Current(1)
VCC = 3.6V, VIN = 0V to VCC
___
5
µA
Output Leakage Current
CE = VIH or CE1 = VIL, VOUT = 0V to VCC
___
5
µA
0.4
V
___
V
VOL
Output Low Voltage
IOL = +4mA
___
VOH
Output High Voltage
IOH = -4mA
2.4
4857 tbl 08
NOTE:
1. At Vcc < 2.0V input leakages are undefined.
DC Electrical Characteristics Over the Operating
Temperature Supply Voltage Range(3,6) (VCC = 3.3V ± 0.3V)
70V9379L7
Com'l Only
Symbol
ICC
ISB1
ISB2
ISB3
ISB4
Parameter
Test Condition
Version
70V9379L9
Com'l Only
70V9379L12
Com'l Only
Typ. (4)
Max.
Typ. (4)
Max.
Typ. (4)
Max.
Unit
mA
Dynamic Operating
Current (Both
Ports Active)
CEL and CER= VIL,
Outputs Disabled,
f = fMAX(1)
COM'L
L
200
310
180
260
150
230
IND
L
____
____
____
____
____
____
Standby Current
(Both Ports - TTL
Level Inputs)
CEL = CER = VIH
COM'L
L
65
130
50
100
40
80
IND
L
____
____
____
____
____
____
Standby
Current (One
Port - TTL
Level Inputs)
CE"A" = VIL and
CE"B" = VIH(5)
Active Port Outputs
Disabled, f=fMAX(1)
COM'L
L
140
245
110
190
100
175
IND
L
____
____
____
____
____
____
Full Standby
Current (Both
Ports - CMOS
Level Inputs)
Both Ports CEL and
CER > VCC - 0.2V,
V IN > VCC - 0.2V or
V IN < 0.2V, f = 0(2)
COM'L
L
0.4
3
0.4
3
0.4
3
IND
L
____
____
____
____
____
____
Full Standby
Current (One
Port - CMOS
Level Inputs)
COM'L
CE"A" < 0.2V and
CE"B" > VCC - 0.2V(5)
IND
V IN > VCC - 0.2V or
V IN < 0.2V, Active Port,
(1)
Outputs Disabled , f = fMAX
L
130
235
100
180
90
165
L
____
____
____
____
____
____
f = fMAX
(1)
mA
mA
mA
mA
4857 tbl 09
NOTES:
1. At f = fMAX, address and control lines (except Output Enable) are cycling at the maximum frequency clock cycle of 1/tCYC, using "AC TEST CONDITIONS" at input
levels of GND to 3V.
2. f = 0 means no address, clock, or control lines change. Applies only to input at CMOS level standby.
3. Port "A" may be either left or right port. Port "B" is the opposite from port "A".
4. Vcc = 3.3V, TA = 25°C for Typ, and are not production tested. ICC DC(f=0) = 90mA (Typ).
5. CEX = V IL means CE0X = VIL and CE1X = VIH
CEX = VIH means CE0X = VIH or CE1X = VIL
CEX < 0.2V means CE0X < 0.2V and CE1X > VCC - 0.2V
CEX > VCC - 0.2V means CE0X > VCC - 0.2V or CE1X < 0.2V
"X" represents "L" for left port or "R" for right port.
6. Industrial temperature: for specific speeds, packages and powers contact your sales office.
6.42
5
IDT70V9379L
High-Speed 32K x 18 Dual-Port Synchronous Pipelined Static RAM
Industrial and Commercial Temperature Ranges
AC Test Conditions
Input Pulse Levels
GND to 3.0V
Input Rise/Fall Times
3ns Max.
Input Timing Reference Levels
1.5V
Output Reference Levels
1.5V
Output Load
Figures 1, 2, and 3
4857 tbl 10
3.3V
3.3V
590Ω
590Ω
DATAOUT
DATAOUT
30pF
435Ω
5pF*
435Ω
4857 drw 03
4857 drw 04
Figure 2. Output Test Load
(For tCKLZ, tCKHZ, tOLZ, and tOHZ ).
*Including scope and jig.
Figure 1. AC Output Test load.
8
7
- 10pF is the I/O capacitance
of this device, and 30pF is the
AC Test Load Capacitance
6
tCD1,
tCD2
(Typical, ns)
5
4
3
2
1
0
-1
20 40 60 80 100 120 140 160 180 200
Capacitance (pF)
4857 drw 05
Figure 3. Typical Output Derating (Lumped Capacitive Load).
6.42
6
.
IDT70V9379L
High-Speed 32K x 18 Dual-Port Synchronous Pipelined Static RAM
Industrial and Commercial Temperature Ranges
AC Electrical Characteristics Over the Operating Temperature Range
(Read and Write Cycle Timing)(3,4) (VCC = 3.3V ± 0.3V, TA = 0°C to +70°C)
70V9379L7
Com'l Only
Symbol
tCYC1
tCYC2
tCH1
tCL1
tCH2
tCL2
Parameter
Clock Cycle Time (Flow-Through)
(2)
(2)
Clock Cycle Time (Pipelined)
(2)
Clock High Time (Flow-Through)
(2)
Clock Low Time (Flow-Through)
(2)
Clock High Time (Pipelined)
(2)
Clock Low Time (Pipelined)
Min.
Max.
22
____
12
____
7.5
____
7.5
____
5
____
5
____
70V9379L9
Com'l Only
Min.
Max.
25
____
15
____
12
____
12
____
6
____
6
____
70V9379L12
Com'l Only
Min.
Max.
Unit
30
____
ns
20
____
ns
12
____
ns
12
____
ns
8
____
ns
8
____
ns
3
ns
Clock Rise Time
____
3
____
3
____
tF
Clock Fall Time
____
3
____
3
____
3
ns
tSA
Address Setup Time
4
____
4
____
4
____
ns
tHA
Address Hold Time
0
____
1
____
1
____
ns
tSC
Chip Enable Setup Time
4
____
4
____
4
____
ns
tHC
Chip Enable Hold Time
0
____
1
____
1
____
ns
tSW
R/W Setup Time
4
____
4
____
4
____
ns
0
____
1
____
1
____
ns
4
____
4
____
4
____
ns
0
____
1
____
1
____
ns
4
____
4
____
4
____
ns
0
____
1
____
1
____
ns
4
____
4
____
4
____
ns
0
____
1
____
1
____
ns
4
____
4
____
4
____
ns
0
____
1
____
1
____
ns
____
9
____
12
____
12
ns
2
____
2
____
2
____
ns
1
7
1
7
1
7
ns
tR
tHW
tSD
R/W Hold Time
Input Data Setup Time
tHD
Input Data Hold Time
tSAD
ADS Setup Time
tHAD
ADS Hold Time
tSCN
CNTEN Setup Time
tHCN
CNTEN Hold Time
tSRST
CNTRST Setup Time
tHRST
CNTRST Hold Time
tOE
tOLZ
tOHZ
tCD1
tCD2
tDC
Output Enable to Data Valid
(1)
Output Enable to Output Low-Z
(1)
Output Enable to Output High-Z
(2)
____
Clock to Data Valid (Flow-Through)
(2)
Clock to Data Valid (Pipelined)
Data Output Hold After Clock High
(1)
18
____
20
____
25
ns
____
7.5
____
9
____
12
ns
2
____
2
____
2
____
ns
tCKHZ
Clock High to Output High-Z
2
9
2
9
2
9
ns
tCKLZ
Clock High to Output Low-Z(1)
2
____
2
____
2
____
ns
Write Port Clock High to Read Data Delay
____
28
____
35
____
40
ns
Clock-to-Clock Setup Time
____
10
____
15
____
15
ns
Port-to-Port Delay
tCWDD
tCCS
4857 tbl 11
NOTES:
1. Transition is measured 0mV from Low or High-impedance voltage with the Output Test Load (Figure 2). This parameter is guaranteed by device characterization, but is not production tested.
2. The Pipelined output parameters (tCYC2, tCD2 ) apply to either or both the Left and Right ports when FT/PIPE = VIH. Flow-through parameters (tCYC1, tCD1) apply
when FT/PIPE = VIL for that port.
3. All input signals are synchronous with respect to the clock except for the asynchronous Output Enable (OE), FT/PIPER, and FT/PIPEL.
4. Industrial temperature: for specific speeds, packages and powers contact your sales office.
6.42
7
IDT70V9379L
High-Speed 32K x 18 Dual-Port Synchronous Pipelined Static RAM
Industrial and Commercial Temperature Ranges
Timing Waveform of Read Cycle for Flow-Through Output
(FT/PIPE"X" = VIL)(3,7)
tCYC1
tCH1
tCL1
CLK
CE0
tSC
tSC
t HC
tHC
(4)
CE1
tSB
tHB
UB, LB
tHB
tSB
R/W
tSW tHW
tSA
(5)
ADDRESS
tHA
An
An + 1
tCD1
DATAOUT
An + 3
tCKHZ (1)
Qn
tCKLZ
OE
An + 2
tDC
Qn + 1
Qn + 2
(1)
(1)
tOHZ
tDC
tOLZ (1)
(2)
tOE
4857 drw 06
Timing Waveform of Read Cycle for Pipelined Operation
(FT/PIPE"X" = VIH)(3,7)
tCYC2
tCH2
tCL2
CLK
CE0
tSC
tSC
tHC
tHC
(4)
CE1
tSB
tSB
tHB
R/W
ADDRESS
(5)
tSW
tHW
tSA
tHA
An
An + 1
(1 Latency)
An + 2
Qn
tCKLZ
An + 3
tDC
tCD2
DATAOUT
OE
tHB
(6)
UB, LB
(1)
Qn + 2(6)
Qn + 1
tOHZ(1)
tOLZ (1)
(2)
tOE
4857 drw 07
NOTES:
1. Transition is measured 0mV from Low or High-impedance voltage with the Output Test Load (Figure 2).
2. OE is asynchronously controlled; all other inputs are synchronous to the rising clock edge.
3. ADS = VIL, CNTEN and CNTRST = VIH.
4. The output is disabled (High-Impedance state) by CE0 = V IH, CE1 = VIL, UB = VIH, or LB = V IH following the next rising edge of the clock. Refer to Truth Table 1.
5. Addresses do not have to be accessed sequentially since ADS = VIL constantly loads the address on the rising edge of the CLK; numbers
are for reference use only.
6. If UB or LB was HIGH, then the Upper Byte and/or Lower Byte of DATAOUT for Qn + 2 would be disabled (High-Impedance state).
7. "X' here denotes Left or Right port. The diagram is with respect to that port.
6.42
8
IDT70V9379L
High-Speed 32K x 18 Dual-Port Synchronous Pipelined Static RAM
Industrial and Commercial Temperature Ranges
Timing Waveform of a Bank Select Pipelined Read(1,2)
tCH2
tCYC2
tCL2
CLK
tSA
tHA
A0
ADDRESS(B1)
tSC
tHC
CE0(B1)
tSC
tHC
Q0
DATAOUT(B1)
tDC
tCD2
Q3
Q1
tDC
tCKLZ
(3)
tCKHZ (3)
tHA
A0
ADDRESS(B2)
tCKHZ(3)
tCD2
tCD2
tSA
A6
A5
A4
A3
A2
A1
A6
A5
A4
A3
A2
A1
tSC tHC
CE0(B2)
tSC
tHC
tCD2
DATAOUT(B2)
tCKHZ
(3)
tCD2
Q2
tCKLZ(3)
tCKLZ
(3)
Q4
4857 drw 08
Timing Waveform with Port-to-Port Flow-Through Read(4,5,7)
CLK "A"
tSW tHW
R/W "A"
tSA
ADDRESS "A"
tHA
tSD
DATAIN "A"
NO
MATCH
MATCH
tHD
VALID
tCCS
(6)
CLK "B"
tCD1
R/W "B"
ADDRESS "B"
tSW
tHW
tSA
tHA
NO
MATCH
MATCH
tCWDD
(6)
tCD1
DATAOUT "B"
VALID
VALID
tDC
tDC
4857 drw 09
NOTES:
1. B1 Represents Bank #1; B2 Represents Bank #2. Each Bank consists of one IDT70V9379 for this waveform, and are setup for depth expansion in this
example. ADDRESS(B1) = ADDRESS (B2) in this situation.
2. UB, LB, OE, and ADS = VIL; CE1(B1) , CE1(B2), R/W, CNTEN, and CNTRST = VIH.
3. Transition is measured 0mV from Low or High-impedance voltage with the Output Test Load (Figure 2).
4. CE 0, UB, LB, and ADS = VIL; CE1, CNTEN, and CNTRST = VIH .
5. OE = V IL for the Right Port, which is being read from. OE = VIH for the Left Port, which is being written to.
6. If t CCS < maximum specified, then data from right port READ is not valid until the maximum specified for tCWDD.
If t CCS > maximum specified, then data from right port READ is not valid until tCCS + t CD1. tCWDD does not apply in this case.
7. All timing is the same for both Left and Right ports. Port "A" may be either Left or Right port. Port "B" is the opposite from Port "A".
6.42
9
IDT70V9379L
High-Speed 32K x 18 Dual-Port Synchronous Pipelined Static RAM
Industrial and Commercial Temperature Ranges
Timing Waveform of Pipelined Read-to-Write-to-Read (OE = VIL)(3)
tCYC2
tCH2
tCL2
CLK
CE0
tSC
tHC
tSB
tHB
CE1
UB, LB
tSW tHW
R/W
(4)
ADDRESS
tSW tHW
An
tSA tHA
An +1
An + 2
An + 4
An + 3
An + 2
tSD tHD
DATAIN
Dn + 2
tCD2
(2)
tCKHZ
(1)
(1)
tCD2
tCKLZ
Qn + 3
Qn
DATAOUT
READ
NOP
(5)
WRITE
READ
4857 drw 10
Timing Waveform of Pipelined Read-to-Write-to-Read (OE Controlled)(3)
tCH2
tCYC2
tCL2
CLK
CE0
tSC
tHC
tSB
tHB
CE1
UB, LB
tSW tHW
R/W
(4)
ADDRESS
tSW tHW
An
tSA tHA
An +1
An + 2
An + 3
An + 4
An + 5
tSD tHD
DATAIN
Dn + 3
Dn + 2
tCD2
(2)
tCKLZ(1)
tCD2
Qn
DATAOUT
Qn + 4
tOHZ(1)
OE
READ
WRITE
READ
4857 drw 11
NOTES:
1. Transition is measured 0mV from Low or High-impedance voltage with the Output Test Load (Figure 2).
2. Output state (High, Low, or High-impedance) is determined by the previous cycle control signals.
3. CE0, UB, LB, and ADS = VIL; CE1, CNTEN, and CNTRST = V IH. "NOP" is "No Operation".
4. Addresses do not have to be accessed sequentially since ADS = VIL constantly loads the address on the rising edge of the CLK; numbers are for
reference use only.
5. "NOP" is "No Operation." Data in memory at the selected address may be corrupted and should be re-written to guarantee data integrity.
6.42
10
IDT70V9379L
High-Speed 32K x 18 Dual-Port Synchronous Pipelined Static RAM
Industrial and Commercial Temperature Ranges
Timing Waveform of Flow-Through Read-to-Write-to-Read (OE = VIL)(3)
tCH1
tCYC1
tCL1
CLK
CE0
tSC
tHC
tSB
tHB
CE1
UB, LB
tSW tHW
R/W
tSW tHW
(4)
ADDRESS
tSA
An
tHA
An +1
An + 2
An + 4
An + 3
An + 2
tSD tHD
DATAIN
Dn + 2
tCD1
(2)
tCD1
Qn
DATAOUT
tCD1
tCD1
Qn + 1
tDC
tCKHZ
READ
NOP
(1)
tCKLZ
(5)
WRITE
Qn + 3
tDC
READ
(1)
4857 drw 12
Timing Waveform of Flow-Through Read-to-Write-to-Read (OE Controlled)(3)
tCYC1
tCH1
tCL1
CLK
CE0
tSC
tHC
tSB
tHB
CE1
UB, LB
tSW tHW
R/W
tSW tHW
(4)
An
tSA tHA
ADDRESS
An +1
DATAIN
(2)
DATAOUT
An + 2
tSD tHD
An + 3
Dn + 2
Dn + 3
tDC
tCD1
Qn
An + 4
tOE
tCD1
(1)
tOHZ
(1)
An + 5
tCKLZ
tCD1
Qn + 4
tDC
OE
READ
WRITE
READ
4857 drw 13
NOTES:
1. Transition is measured 0mV from Low or High-impedance voltage with the Output Test Load (Figure 2).
2. Output state (High, Low, or High-impedance) is determined by the previous cycle control signals.
3. CE 0, UB, LB, and ADS = VIL; CE1, CNTEN, and CNTRST = V IH. "NOP" is "No Operation".
4. Addresses do not have to be accessed sequentially since ADS = VIL constantly loads the address on the rising edge of the CLK; numbers are for
reference use only.
5. "NOP" is "No Operation." Data in memory at the selected address may be corrupted and should be re-written to guarantee data integrity.
6.42
11
IDT70V9379L
High-Speed 32K x 18 Dual-Port Synchronous Pipelined Static RAM
Industrial and Commercial Temperature Ranges
Timing Waveform of Pipelined Read with Address Counter Advance (1)
tCH2
tCYC2
tCL2
CLK
tSA
ADDRESS
tHA
An
tSAD tHAD
ADS
tSAD tHAD
CNTEN
tSCN tHCN
tCD2
DATAOUT
Qx - 1(2)
Qn + 2(2)
Qn + 1
Qn
Qx
Qn + 3
tDC
READ
EXTERNAL
ADDRESS
READ
WITH
COUNTER
COUNTER
HOLD
READ WITH COUNTER
4857 drw 14
Timing Waveform of Flow-Through Read with Address Counter Advance(1)
tCH1
tCYC1
tCL1
CLK
tSA
ADDRESS
tHA
An
tSAD tHAD
tSAD tHAD
ADS
tSCN tHCN
CNTEN
tCD1
DATAOUT
Qx(2)
Qn
Qn + 1
Qn + 2
Qn + 3(2)
Qn + 4
tDC
READ
EXTERNAL
ADDRESS
READ WITH COUNTER
COUNTER
HOLD
READ
WITH
COUNTER
4857 drw 15
NOTES:
1. CE0, OE, UB, and LB = VIL; CE1, R/W, and CNTRST = V IH.
2. If there is no address change via ADS = VIL (loading a new address) or CNTEN = VIL (advancing the address), i.e. ADS = VIH and CNTEN = VIH, then the data
output remains constant for subsequent clocks.
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12
IDT70V9379L
High-Speed 32K x 18 Dual-Port Synchronous Pipelined Static RAM
Industrial and Commercial Temperature Ranges
Timing Waveform of Write with Address Counter Advance
(Flow-Through or Pipelined Outputs) (1)
tCH2
tCYC2
tCL2
CLK
tSA
tHA
An
ADDRESS
INTERNAL(3)
ADDRESS
An(7)
An + 2
An + 1
An + 4
An + 3
tSAD tHAD
ADS
CNTEN(7)
tSD tHD
Dn + 1
Dn
DATAIN
WRITE
EXTERNAL
ADDRESS
Dn + 1
Dn + 4
Dn + 3
Dn + 2
WRITE
WRITE
WITH COUNTER COUNTER HOLD
WRITE WITH COUNTER
4857 drw 16
Timing Waveform of Counter Reset (Pipelined Outputs)(2)
tCH2
tCYC2
tCL2
CLK
tSA tHA
An
ADDRESS(4)
INTERNAL(3)
ADDRESS
Ax
(6)
0
1
An + 2
An + 1
An
An + 1
tSW tHW
R/W
ADS
tSAD tHAD
CNTEN
tSCN tHCN
tSRST tHRST
CNTRST
tSD
tHD
D0
DATAIN
DATAOUT(5)
Q1
Q0
COUNTER
RESET
(6)
WRITE
ADDRESS 0
READ
ADDRESS 0
READ
ADDRESS 1
READ
ADDRESS n
Qn
READ
ADDRESS n+1
NOTES:
4857 drw 17
1. CE 0, UB, LB, and R/W = VIL; CE1 and CNTRST = VIH.
2. CE 0, UB, LB = VIL; CE1 = VIH.
3. The "Internal Address" is equal to the "External Address" when ADS = VIL and equals the counter output when ADS = VIH.
4. Addresses do not have to be accessed sequentially since ADS = VIL constantly loads the address on the rising edge of the CLK; numbers are for reference use only.
5. Output state (High, Low, or High-impedance) is determined by the previous cycle control signals.
6. No dead cycle exists during counter reset. A READ or WRITE cycle may be coincidental with the counter reset cycle. ADDR 0 will be accessed. Extra cycles
are shown here simply for clarification.
7. CNTEN = VIL advances Internal Address from ‘An’ to ‘An +1’. The transition shown indicates the time required for the counter to advance.
The ‘An +1’ Address is written to during this cycle.
6.42
13
IDT70V9379L
High-Speed 32K x 18 Dual-Port Synchronous Pipelined Static RAM
Industrial and Commercial Temperature Ranges
Functional Description
Depth and Width Expansion
The IDT70V9379 provides a true synchronous Dual-Port Static RAM
interface. Registered inputs provide minimal set-up and hold times on
address, data, and all critical control inputs. All internal registers are clocked
on the rising edge of the clock signal, however, the self-timed internal write
pulse is independent of the LOW to HIGH transition of the clock signal.
An asynchronous output enable is provided to ease asynchronous
bus interfacing. Counter enable inputs are also provided to staff the
operation of the address counters for fast interleaved memory applications.
CE0 = VIL and CE1 = VIH for one clock cycle will power down the
internal circuitry to reduce static power consumption. Multiple chip enables
allow easier banking of multiple IDT70V9379's for depth expansion
configurations. When the Pipelined output mode is enabled, two cycles are
required with CE0 = VIL and CE1 = VIH to re-activate the outputs.
The IDT70V9379 features dual chip enables (refer to Truth Table I)
in order to facilitate rapid and simple depth expansion with no requirements
for external logic. Figure 4 illustrates how to control the varioius chip
enables in order to expand two devices in depth.
The IDT70V9379 can also be used in applications requiring expanded
width, as indicated in Figure 4. Since the banks are allocated at the
discretion of the user, the external controller can be set up to drive the input
signals for the various devices as required to allow for 36-bit or wider
applications.
A15
IDT70V9379
CE0
CE1
CE1
VCC
CE1
IDT70V9379
VCC
CE1
CE0
CE0
Control Inputs
CE0
Control Inputs
Control Inputs
IDT70V9379
IDT70V9379
Control Inputs
4857 drw 18
Figure 4. Depth and Width Expansion with IDT70V9379
6.42
14
CNTRST
CLK
ADS
CNTEN
R/W
LB, UB
OE
IDT70V9379L
High-Speed 32K x 18 Dual-Port Synchronous Pipelined Static RAM
Industrial and Commercial Temperature Ranges
Ordering Information
IDT
XXXXX
A
99
A
A
Device
Type
Power
Speed
Package
Process/
Temperature
Range
Blank
I (1)
Commercial (0°C to +70°C)
Industrial (-40°C to +85°C)
PRF
128-pin TQFP (PK128-1)
7
9
12
Commercial Only
Commercial Only
Commercial Only
L
Low Power
Speed in nanoseconds
70V9379 576K (32K x 18-Bit) Synchronous Dual-Port RAM
4857 drw 19
NOTE:
1. Industrial temperature range is available.
For specific speeds, packages and powers contact your sales office.
Datasheet Document History
9/30/99:
11/10/99:
1/17/01:
Initial Public Release
Replace IDT logo
Page 4 Changed information in Truth Table II
Increased storage temperature parameters
Clarified TA parameter
Page 5 DC Electrical parameters–changed wording from "open" to "disabled"
Changed ±200mV to 0mV in notes
Removed Preliminary status
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6.42
15
for Tech Support:
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