Cypress Semiconductor CY7C199 User manual

32K x 8 Static RAM
CY7C199
Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600
Document #: 38-05160 Rev. ** Revised September 7, 2001
99
Features
• High speed
—10ns
•Fastt
DOE
• CMOS for optimum speed/power
• Low active power
—467 mW (max, 12 ns “L” version)
• Low standby power
—0.275 mW (max, “L” version)
• 2V data retention (“L” version only)
• Easy memory expansion with CE and OE features
• TTL-compatible inputs and outputs
• Automatic power-down when deselected
Functional Description
The CY7C199 is a high-performance CMOS static RAM orga-
nized as 32,768 words by 8 bits. Easy memory expansion is
provided by an active LOW Chip Enable (CE) and active LOW
Output Enable (OE) and three-state drivers. This device has
an automatic power-down feature, reducing the power con-
sumption by 81% when deselected. The CY7C199 is in the
standard 300-mil-wide DIP, SOJ, and LCC packages.
An active LOW Write Enable signal (WE) controls the writ-
ing/reading operation of the memory. When CE andWEinputs
are both LOW, data on the eight data input/output pins (I/O0
through I/O7) is written into the memory location addressed by
the address present on the address pins (A0through A14).
Reading the device is accomplished by selecting the device
and enabling the outputs, CE and OE active LOW, while WE
remains inactive or HIGH. Under these conditions, the con-
tents of the location addressed by the information on address
pins are present on the eight data input/output pins.
The input/output pins remain in a high-impedance stateunless
the chip is selected, outputs are enabled, and Write Enable
(WE) is HIGH. A die coat is used to improve alpha immunity.
Selection Guide
7C199-8 7C199-10 7C199-12 7C199-15 7C199-20 7C199-25 7C199-35 7C199-45
Maximum Access Time (ns) 81012 15 20 25 35 45
Maximum Operating
Current (mA) 120 110 160 155 150 150 140 140
L90 90 90 90 80 70
Maximum CMOS
Standby Current (mA) 0.5 0.5 10 10 10 10 10 10
L0.05 0.05 0.05 0.05 0.05 0.05
Shaded area contains advance information.
Logic Block Diagram Pin Configurations
A1
A2
A3
A4
A5
A6
A7
A8
COLUMN
DECODER
ROW DECODER
SENSE AMPS
INPUT BUFFER
POWER
DOWN
WE
OE
I/O0
CE
I/O1
I/O2
I/O3
1
2
3
4
5
6
7
8
9
10
11
14 15
16
20
19
18
17
21
24
23
22
Top View
DIP / SOJ / SOIC
12
13
25
28
27
26
GND
A6
A7
A8
A9
A10
A11
A12
A13
WE
VCC
A4
A3
A2
A1
I/O7
I/O6
I/O5
I/O4
A14
A5
I/O0
I/O1
I/O2
CE
OE
A0
I/O3
1024 x 32 x 8
ARRAY
I/O7
I/O6
I/O5
I/O4
A9
A0
A
11
A
13
A
12
A
14
A
10
28
4
5
6
7
8
9
10
321 27
1314151617
26
25
24
23
22
21
20
11
12 19 18
A7
VCC
I/O5
GND
WE
A6 A5
I/O4 I/O3 I/O2
A8
A9
A10
A11
A12
A13
A14 CE
A3
A2
A1
A0
I/O1I/O7
I/O6
A4
OE
I/O0
Top View
LCC
C199–1
C199–2
C199–3
22
23
24
25
26
27
28
1
2
510
11
15
14
13
12
16
19
18
17
3
4
20
21
7
68
9
OE
A1
A2
A3
A4
WE
VCC
A5
A6
A7
A8
A9
A0
CE
I/O 7
I/O 6
I/O 5
GND
I/O 2
I/O 1
I/O 4
I/O 0
A14
A10
A11 A13
A12
C199–4
I/O 3
TSOP I
Top View
(not to scale)

CY7C199
Document #: 38-05160 Rev. ** Page 2 of 16
Maximum Ratings
(Above which the useful life may be impaired. For user guide-
lines, not tested.)
Storage Temperature .................................–65°C to +150°C
Ambient Temperature with
Power Applied.............................................–55°C to +125°C
Supply Voltage to Ground Potential
(Pin 28 to Pin 14)...........................................–0.5V to +7.0V
DC Voltage Applied to Outputs
in High Z State[1] ...................................–0.5V to VCC + 0.5V
DC Input Voltage[1]................................–0.5V to VCC + 0.5V
Output Current into Outputs (LOW).............................20 mA
Static Discharge Voltage.......................................... >2001V
(per MIL-STD-883, Method 3015)
Latch-Up Current.................................................... >200 mA
Operating Range
Range Ambient Temperature[2] VCC
Commercial 0°C to +70°C 5V ±10%
Industrial –40°C to +85°C5V ±10%
Military –55°C to +125°C 5V ±10%
Electrical Characteristics Over the Operating Range[3]
7C199-8 7C199-10 7C199-12 7C199-15
Parameter Description Test Conditions Min. Max. Min. Max. Min. Max. Min. Max. Unit
VOH Output HIGH
Voltage VCC = Min., IOH=–4.0 mA 2.4 2.4 2.4 2.4 V
VOL Output LOW
Voltage VCC = Min., IOL=8.0 mA 0.4 0.4 0.4 0.4 V
VIH Input HIGH
Voltage 2.2 VCC
+0.3V 2.2 VCC +0.3V 2.2 VCC +0.3V 2.2 VCC +0.3V V
VIL Input LOW
Voltage –0.5 0.8 –0.5 0.8 –0.5 0.8 –0.5 0.8 V
IIX Input Load
Current GND <VI< VCC –5+5 –5+5–5+5–5+5µA
IOZ Output Leakage
Current GND < VO <VCC, Output Disabled –5+5 –5+5–5+5–5+5µA
ICC VCC Operating
Supply Current VCC = Max., IOUT = 0 mA,
f = fMAX = 1/tRC
Com’l120 110 160 155 mA
L85 85 100 mA
Mil 180 mA
ISB1 Automatic CE
Power-Down
Current—TTL
Inputs
Max. VCC,
CE > VIH,
VIN > VIH or
VIN < VIL, f = fMAX
Com’l553030mA
L555mA
ISB2 Automatic CE
Power-Down
Current—CMOS
Inputs
Max. VCC,
CE > VCC –0.3V
VIN > VCC –0.3V
or VIN < 0.3V, f= 0
Com’l0.5 0.5 10 10 mA
L0.05 0.05 0.05 0.05 mA
Mil 15 mA
Shaded area contains advance information.
Notes:
1. VIL (min.)= –2.0V for pulse durations of less than 20 ns.
2. TAis the “instant on”case temperature.
3. See the last page of this specification for Group A subgroup testing information.

CY7C199
Document #: 38-05160 Rev. ** Page 3 of 16
]
Electrical Characteristics Over the Operating Range[3] (continued)
7C199-20 7C199-25 7C199-35 7C199-45
Parameter Description Test Conditions Min. Max. Min. Max. Min. Max. Min. Max. Unit
VOH Output HIGH
Voltage VCC = Min., IOH=–4.0 mA 2.4 2.4 2.4 2.4 V
VOL Output LOW
Voltage VCC = Min., IOL=8.0 mA 0.4 0.4 0.4 0.4 V
VIH Input HIGH
Voltage 2.2 VCC
+0.3V 2.2 VCC +0.3V 2.2 VCC +0.3V 2.2 VCC +0.3V V
VIL Input LOW
Voltage –0.5 0.8 -0.5 0.8 -0.5 0.8 -0.5 0.8 V
IIX Input Load
Current GND <VI< VCC –5+5–5+5–5+5 –5+5µA
IOZ Output Leakage
Current GND <VI <VCC, Output Disabled –5+5–5+5–5+5 –5+5µA
ICC VCC Operating
Supply Current VCC = Max., IOUT = 0 mA,
f = fMAX = 1/tRC
Com’l 150 150 140 140 mA
L90807070mA
Mil 170 150 150 150 mA
ISB1 Automatic CE
Power-Down
Current—
TTL Inputs
Max.VCC,CE> VIH,
VIN > VIH
or VIN < VIL, f = fMAX
Com’l30 30 25 25mA
L5555mA
ISB2 Automatic CE
Power-Down
Current—
CMOS Inputs
Max. VCC,
CE > VCC –0.3V
VIN > VCC –0.3V or
VIN < 0.3V, f=0
Com’l10 10 10 10mA
L 0.05 0.05 0.05 0.05 µA
Mil 15 15 15 15 mA
Capacitance[4]
Parameter Description Test Conditions Max. Unit
CIN Input Capacitance TA= 25°C, f = 1 MHz,
VCC = 5.0V 8pF
COUT Output Capacitance 8 pF
Note:
4. Tested initially and after any design or process changes that may affect these parameters.

CY7C199
Document #: 38-05160 Rev. ** Page 4 of 16
AC Test Loads and Waveforms[5]
Data Retention Characteristics Over the Operating Range (L version only)
Parameter Description Conditions[6] Min. Max. Unit
VDR VCC for Data Retention 2.0 V
ICCDR Data Retention Current Com’l VCC = VDR = 2.0V,
CE > VCC –0.3V,
VIN > VCC –0.3V or
VIN < 0.3V
µA
Com’l L 10 µA
tCDR[4] Chip Deselect to Data Retention Time 0ns
tR[5] Operation Recovery Time 200 µs
Data Retention Waveform
Note:
5. tR<3 ns for the -12 andthe -15 speeds. tR<5 ns for the -20 and slower speeds
6. No input may exceed VCC + 0.5V.
3.0V
5V
OUTPUT
R1 481Ω
R2
255 Ω
30 pF
INCLUDING
JIG AND
SCOPE
GND
90%
10% 90%
10%
≤tr≤tr
5V
OUTPUT
R1 481Ω
R2
255Ω
5pF
INCLUDING
JIG AND
SCOPE
(a) (b)
OUTPUT 1.73V
Equivalent to: THÉVENIN EQUIVALENT
ALL INPUT PULSES
C199–5C199–6
167Ω
C199–7
3.0V3.0V
tCDR
VDR >2V
DATA RETENTION MODE
tR
CE
VCC

CY7C199
Document #: 38-05160 Rev. ** Page 5 of 16
Switching Characteristics Over the Operating Range[3, 7]
7C199-8 7C199-10 7C199-12 7C199-15
UnitParameter Description Min. Max. Min. Max. Min. Max. Min. Max.
READ CYCLE
tRC Read Cycle Time 810 12 15 ns
tAA Address to Data Valid 8 101215ns
tOHA Data Hold from Address Change 3333ns
tACE CE LOW to Data Valid 8 101215ns
tDOE OE LOW to Data Valid 4.5 5 5 7 ns
tLZOE OE LOW to Low Z[8] 0000ns
tHZOE OE HIGH to High Z[8, 9] 5557ns
tLZCE CE LOW to Low Z[8] 3333ns
tHZCE CE HIGH to High Z[8,9] 4557ns
tPU CE LOW to Power-Up 0000ns
tPD CE HIGH to Power-Down 8 101215ns
WRITE CYCLE[10, 11]
tWC Write Cycle Time 810 12 15 ns
tSCE CE LOW to Write End 77910ns
tAW Address Set-Up to Write End 77910ns
tHA Address Hold from Write End 0000ns
tSA Address Set-Up to Write Start 0000ns
tPWE WE Pulse Width 7789ns
tSD Data Set-Up to Write End 5589ns
tHD Data Hold from Write End 0000ns
tHZWE WE LOW to High Z[9] 5677ns
tLZWE WE HIGH to Low Z[8] 3333ns
Shaded area contains advance information.
Notes:
7. Test conditions assume signal transition time of 3 ns or less for -12 and -15 speeds and 5 ns or less for -20 and slower speeds, timing reference levels of 1.5V,
input pulse levels of 0 to 3.0V, and output loading of the specified IOL/IOH and 30-pF load capacitance.
8. At any given temperature and voltage condition, tHZCE is less than tLZCE, tHZOE is less than tLZOE, and tHZWE is less than tLZWE for any given device.
9. tHZOE, tHZCE, and tHZWE are specified with CL= 5 pF as in part (b) of AC Test Loads. Transition is measured ±500 mV from steady-state voltage.
10. The internal write time of the memory is defined by the overlap of CELOW and WE LOW. Both signals must be LOW to initiate a write and either signal can terminate
a write by going HIGH. The data input set-up and hold timing should be referenced to the rising edge of the signalthat terminates the write.
11. The minimum write cycle time for write cycle #3 (WEcontrolled, OE LOW) is the sum oftHZWE and tSD.

CY7C199
Document #: 38-05160 Rev. ** Page 6 of 16
Switching Characteristics Over the Operating Range[3,7] (continued)
7C199-20 7C199-25 7C199-35 7C199-45
Parameter Description Min. Max. Min. Max. Min. Max. Min. Max. Unit
READ CYCLE
tRC Read Cycle Time 20 25 35 45 ns
tAA Address to Data Valid 20 25 35 45 ns
tOHA Data Hold from Address
Change 33 3 3 ns
tACE CE LOW to Data Valid 20 25 35 45 ns
tDOE OE LOW to Data Valid 9 10 16 16 ns
tLZOE OE LOW to Low Z[8] 00 0 0 ns
tHZOE OE HIGH to High Z[8, 9] 9111515ns
tLZCE CE LOW to Low Z[8] 33 3 3 ns
tHZCE CE HIGH to High Z[8, 9] 9111515ns
tPU CE LOW to Power-Up 0 0 0 0 ns
tPD CE HIGH to Power-Down 20 20 20 25 ns
WRITE CYCLE[10,11]
tWC Write Cycle Time 20 25 35 45 ns
tSCE CE LOW to Write End 15 18 22 22 ns
tAW Address Set-Up to Write End 15 20 30 40 ns
tHA Address Hold from Write End 0 0 0 0 ns
tSA Address Set-Up to Write Start 0 0 0 0 ns
tPWE WE Pulse Width 15 18 22 22 ns
tSD Data Set-Up to Write End 10 10 15 15 ns
tHD Data Hold from Write End 0 0 0 0 ns
tHZWE WE LOW to High Z[9] 10 11 15 15 ns
tLZWE WE HIGH to Low Z[8] 33 3 3 ns
Switching Waveforms
Read Cycle No. 1[12, 13]
Notes:
12. Device is continuously selected. OE, CE = VIL.
13. WEis HIGH for read cycle.
ADDRESS
DATA OUT PREVIOUS DATA VALID DATA VALID
tRC
tAA
tOHA
C199–8

CY7C199
Document #: 38-05160 Rev. ** Page 7 of 16
Read Cycle No. 2 [13, 14]
Write Cycle No. 1 (WE Controlled)[10, 15, 16]
Write Cycle No. 2 (CE Controlled)[10, 15, 16]
Notes:
14. Address valid prior to or coincident with CE transition LOW.
15. Data I/O is high impedance if OE= VIH.
16. If CEgoes HIGH simultaneously with WE HIGH, the output remains ina high-impedance state.
Switching Waveforms (continued)
50%
50%
DATA VALID
tRC
tACE
tDOE
tLZOE
tLZCE
tPU
DATA OUT HIGH IMPEDANCE IMPEDANCE
ICC
ISB
tHZOE
tHZCE
tPD
OE
CE
HIGH
VCC
SUPPLY
CURRENT
C199–9
tHD
tSD
tPWE tSA
tHA tAW
tWC
DATA I/O
ADDRESS
CE
WE
OE
tHZOE C199–10
DATAIN VALID
tWC
tAW
tSA
tHA
tHD tSD
tSCE
WE
DATA I/O
ADDRESS
CE
C199–11
DATA IN VALID

CY7C199
Document #: 38-05160 Rev. ** Page 8 of 16
Write Cycle No. 3 (WE Controlled OE LOW)[11, 16]
Typical DC and AC Characteristics
Switching Waveforms (continued)
DATA I/O
ADDRESS
tHD
tSD
tLZWE
tSA
tHA tAW
tWC
CE
WE
tHZWE C199–12
DATAIN VALID
1.2
1.4
1.0
0.6
0.4
0.2
4.0 4.5 5.0 5.5 6.0
1.6
1.4
1.2
1.0
0.8
–55 25 125
–55 25 125
1.2
1.0
0.8
NORMALIZED t
AA
120
100
80
60
40
20
0.0 1.0 2.0 3.0 4.0
OUTPUT SOURCE CURRENT (mA)
SUPPLY VOLTAGE (V)
NORMALIZED SUPPLY CURRENT
vs. SUPPLY VOLTAGE
NORMALIZED ACCESS TIME
vs. AMBIENT TEMPERATURE
AMBIENT TEMPERATURE (°C)
NORMALIZED SUPPLY CURRENT
vs. AMBIENT TEMPERATURE
AMBIENT TEMPERATURE (°C) OUTPUT VOLTAGE (V)
OUTPUT SOURCE CURRENT
vs. OUTPUT VOLTAGE
0.0
0.8
1.4
1.1
1.0
0.9
4.0 4.5 5.0 5.5 6.0
NORMALIZED t
SUPPLY VOLTAGE (V)
NORMALIZED ACCESS TIME
vs. SUPPLY VOLTAGE
120
140
100
60
40
20
0.0 1.0 2.0 3.0 4.0
OUTPUT SINK CURRENT (mA)
0
80
OUTPUT VOLTAGE (V)
OUTPUT SINK CURRENT
vs. OUTPUT VOLTAGE
0.6
0.4
0.2
0.0
NORMALIZED I
CC
,I
SB
NORMALIZED I
CC
,I
SB
ISB
ICC
ICC
VCC =5.0V VCC =5.0V
TA=25°C
VCC =5.0V
TA=25°C
ISB
TA=25°C
0.6
0.8
0
AA
1.3
1.2
VIN =5.0V
TA=25°C
1.4
VCC =5.0V
VIN =5.0V

CY7C199
Document #: 38-05160 Rev. ** Page 9 of 16
Truth Table
CE WE OE Inputs/Outputs Mode Power
H X X High Z Deselect/Power-Down Standby (ISB)
L H L Data Out Read Active (ICC)
L L X Data In Write Active (ICC)
L H H High Z Deselect, Output Disabled Active (ICC)
Ordering Information
Speed
(ns) Ordering Code Package Name Package Type Operating Range
8CY7C199-8VC V21 28-Lead Molded SOJ Commercial
CY7C199-8ZC Z28 28-Lead Thin Small Outline Package
CY7C199L-8VC V21 28-Lead Molded SOJ
CY7C199L-8ZC Z28 28-Lead Thin Small Outline Package
10 CY7C199-10VC V21 28-Lead Molded SOJ Commercial
CY7C199-10ZC Z28 28-Lead Thin Small Outline Package
CY7C199L-10VC V21 28-Lead Molded SOJ
CY7C199L-10ZC Z28 28-Lead Thin Small Outline Package
CY7C199-10VI V21 28-Lead Molded SOJ Industrial
CY7C199-10ZI Z28 28-Lead Thin Small Outline Package
CY7C199L-10VI V21 28-Lead Molded SOJ
CY7C199L-10ZI Z28 28-Lead Thin Small Outline Package
12 CY7C199-12PC P21 28-Lead (300-Mil) Molded DIP Commercial
CY7C199-12VC V21 28-Lead Molded SOJ
CY7C199-12ZC Z28 28-Lead Thin Small Outline Package
CY7C199L-12PC P21 28-Lead (300-Mil) Molded DIP
CY7C199L-12VC V21 28-Lead Molded SOJ
CY7C199L-12ZC Z28 28-Lead Thin Small Outline Package
CY7C199-12VI V21 28-Lead Molded SOJ Industrial
CY7C199-12ZI Z28 28-Lead Thin Small Outline Package
CY7C199L-12VI V21 28-Lead Molded SOJ
CY7C199L-12ZI Z28 28-Lead Thin Small Outline Package
Shaded area contains advance information. Contact your Cypress sales representative for availability
Typical DC and AC Characteristics (continued)
3.0
2.5
2.0
1.5
1.0
0.5
0.0 1.0 2.0 3.0 4.0
NORMALIZED I
PO
SUPPLY VOLTAGE (V)
TYPICALPOWER-ON CURRENT
vs.SUPPLY VOLTAGE 30.0
25.0
20.0
15.0
10.0
5.0
0 200 400 600 800
DELTA t (ns)
AA
CAPACITANCE (pF)
TYPICAL ACCESS TIMECHANGE
vs. OUTPUT LOADING 1.25
1.00
0.75
10 20 30 40
NORMALIZED I
CC
CYCLE FREQUENCY (MHz)
NORMALIZED ICC vs.CYCLETIME
0.0 5.0 0.0 1000 0.50
VCC =4.5V
TA=25°C
VCC =5.0V
TA=25°C
VIN =0.5V

CY7C199
Document #: 38-05160 Rev. ** Page 10 of 16
15 CY7C199-15PC P21 28-Lead (300-Mil) Molded DIP Commercial
CY7C199-15VC V21 28-Lead Molded SOJ
CY7C199-15ZC Z28 28-Lead Thin Small Outline Package
CY7C199L-15PC P21 28-Lead (300-Mil) Molded DIP
CY7C199L-15VC V21 28-Lead Molded SOJ
CY7C199L-15ZC Z28 28-Lead Thin Small Outline Package
CY7C199-15VI V21 28-Lead Molded SOJ Industrial
CY7C199-15ZI Z28 28-Lead Thin Small Outline Package
CY7C199-15DMB D22 28-Lead (300-Mil) CerDIP Military
CY7C199-15LMB L54 28-Pin Rectangular Leadless Chip Carrier
CY7C199L-15DMB D22 28-Lead (300-Mil) CerDIP
CY7C199L-15LMB L54 28-Pin Rectangular Leadless Chip Carrier
20 CY7C199-20PC P21 28-Lead (300-Mil) Molded DIP Commercial
CY7C199-20VC V21 28-Lead Molded SOJ
CY7C199-20ZC Z28 28-Lead Thin Small Outline Package
CY7C199L-20PC P21 28-Lead (300-Mil) Molded DIP
CY7C199L-20VC V21 28-Lead Molded SOJ
CY7C199L-20ZC Z28 28-Lead Thin Small Outline Package
CY7C199-20VI V21 28-Lead Molded SOJ Industrial
CY7C199-20ZI Z28 28-Lead Thin Small Outline Package
CY7C199-20DMB D22 28-Lead (300-Mil) CerDIP Military
CY7C199-20LMB L54 28-Pin Rectangular Leadless Chip Carrier
CY7C199L-20DMB D22 28-Lead (300-Mil) CerDIP
CY7C199L-20LMB L54 28-Pin Rectangular Leadless Chip Carrier
25 CY7C199-25PC P21 28-Lead (300-Mil) Molded DIP Commercial
CY7C199-25SC S21 28-Lead Molded SOIC
CY7C199-25VC V21 28-Lead Molded SOJ
CY7C199-25ZC Z28 28-Lead Thin Small Outline Package
CY7C199L-25ZI Z28 28-Lead Thin Small Outline Package Industrial
CY7C199-25DMB D22 28-Lead (300-Mil) CerDIP Military
CY7C199-25LMB L54 28-Pin Rectangular Leadless Chip Carrier
35 CY7C199-35PC P21 28-Lead (300-Mil) Molded DIP Commercial
CY7C199-35SC S21 28-Lead Molded SOIC
CY7C199-35VC V21 28-Lead Molded SOJ
CY7C199-35ZC Z28 28-Lead Thin Small Outline Package
CY7C199-35DMB D22 28-Lead (300-Mil) CerDIP Military
CY7C199-35LMB L54 28-Pin Rectangular Leadless Chip Carrier
45 CY7C199-45DMB D22 28-Lead (300-Mil) CerDIP Military
CY7C199-45LMB L54 28-Pin Rectangular Leadless Chip Carrier
Ordering Information (continued)
Speed
(ns) Ordering Code Package Name Package Type Operating Range
Shaded area contains advance information. Contact your Cypress sales representative for availability