Cypress Semiconductor MoBL CY62157EV30 Manuale utente

8-Mbit (512K x 16) Static RAM

CY62157EV30 MoBL®

Cypress Semiconductor Corporation • 198 Champion Court • San Jose,CA 95134-1709 • 408-943-2600

Document #: 38-05445 Rev. *E Revised May 07, 2007

Features

• TSOP I package configurable as 512K x 16 or as 1M x 8

SRAM

• High speed: 45 ns

• Wide voltage range: 2.20V–3.60V

• Pin compatible with CY62157DV30

• Ultra low standby power

— Typical Standby current: 2 µA

— Maximum Standby current: 8 µA (Industrial)

• Ultra low active power

— Typical active current: 1.8 mA @ f = 1 MHz

• Easy memory expansion with CE1, CE2, and OE features

• Automatic power down when deselected

• CMOS for optimum speed and power

• Available in both Pb-free and non Pb-free 48-ball VFBGA,

Pb-free 44-pin TSOP II and 48-pin TSOP I packages

Functional Description[1]

The CY62157EV30 is a high performance CMOS static RAM

organized as 512K words by 16 bits. This device features

advanced circuit design to provide ultra low active current.

This is ideal for providing More Battery Life™(MoBL®) in

portable applications such as cellular telephones. The device

also has an automatic power down feature that significantly

reduces power consumption when addresses are not toggling.

Place the device into standby mode when deselected (CE1

HIGH or CE2 LOW or both BHE and BLE are HIGH). The input

or output pins (IO0through IO15) are placed in a high

impedance state when:

• Deselected (CE1HIGH or CE2LOW)

• Outputs are disabled (OE HIGH)

• Both Byte High Enable and Byte Low Enable are disabled

(BHE, BLE HIGH)

• Write operation is active (CE1LOW, CE2HIGH and WE

LOW)

To write to the device, take Chip Enable (CE1 LOW and CE2

HIGH) and Write Enable (WE) inputs LOW. If Byte Low Enable

(BLE) is LOW, then data from IO pins (IO0through IO7) is

written into the location specified on the address pins (A0

through A18). If Byte High Enable (BHE) is LOW, then data

from IO pins (IO8through IO15) is written into the location

specified on the address pins (A0through A18).

To read from the device, take Chip Enable (CE1 LOW and CE2

HIGH) and Output Enable (OE) LOW while forcing the Write

Enable (WE) HIGH. If Byte Low Enable (BLE) is LOW, then

data from the memory location specified by the address pins

appear on IO0to IO7. If Byte High Enable (BHE) is LOW, then

data from memory appears on IO8to IO15. See the “Truth

Table” on page 10 for a complete description of read and write

modes.

Logic Block Diagram

512K × 16 / 1M x 8

RAM Array IO0–IO7

ROW DECODER

A 8

A 7

A 6

A 5

A 2

COLUMN DECODER

A11

A12

A13

A14

A15

SENSE AMPS

DATA IN DRIVERS

A 4

A 3IO8–IO15

BLE

BHE

A16

A 0

A 1

A17

A 9

A18

A10

PowerDown

Circuit BHE

BLE

CE2

CE1CE2

CE1

BYTE

Notes

1. For best practice recommendations, please refer to the Cypress application note AN1064, SRAM System Guidelines.

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CY62157EV30 MoBL®

Document #: 38-05445 Rev. *E Page 2 of 14

Product Portfolio

Product Range

VCC Range (V) Speed

(ns)

Power Dissipation

Operating ICC, (mA) Standby, ISB2

(µA)

f = 1MHz f = fmax

Min Typ [2] Max Typ [2] Max Typ [2] Max Typ [2] Max

CY62157EV30LL Ind’l/Auto-A 2.2V 3.0 3.6 45 1.8 3 18 25 2 8

Pin Configuration

The following pictures show the 44-pin TSOP II and 48-pin TSOP I pinouts.[3, 4, 5]

14 31

A15

A14

A13

A12

A11

A10

DNU

CE2

DNU

BHE

BLE

A18

A17

A16

BYTE

Vss

IO15/A19

IO7

IO14

IO6

IO13

IO5

IO12

IO4

Vcc

IO11

IO3

IO10

IO2

IO9

IO1

IO8

IO0

Vss

CE1

44-Pin TSOP II

Top View

BHE

BLE

48-Pin TSOP I (512K x 16 / 1M x 8)

Top View

Notes

2. Typical values are included for reference only and are not guaranteed or tested. Typical values are measured at VCC = VCC(typ), TA= 25°C.

3. NC pins are not connected on the die.

4. The 44-TSOP II package has only one chip enable (CE) pin.

5. The BYTE pin in the 48-TSOP I package has to be tied HIGH to use the device as a 512K × 16 SRAM. The 48-TSOP I package can also be used as a 1M × 8

SRAM by tying the BYTE signal LOW. In the 1M x 8 configuration, Pin 45 is A19, while BHE, BLE and IO8 to IO14 pins are not used (DNU).

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CY62157EV30 MoBL®

Document #: 38-05445 Rev. *E Page 3 of 14

The following picture shows the 48-ball VFBGA pinout.[3, 4, 5]

Pin Configuration (continued)

A11

A10

A3CE1

IO10

IO8

IO9

IO11

IO13

IO12

IO14

IO15

IO0

BHE

CE2

BLE

IO2

IO1

IO3

IO4

IO5IO6

IO7

A15

A14

A13

A12

A18 NC

A16

A17

48-Ball VFBGA

Top View

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CY62157EV30 MoBL®

Document #: 38-05445 Rev. *E Page 4 of 14

Maximum Ratings

Exceeding maximum ratings may shorten the battery life of the

device. User guidelines are not tested.

Storage Temperature ................................–65°C to + 150°C

Ambient Temperature with

Power Applied ...........................................–55°C to + 125°C

Supply Voltage to Ground

Potential ................................–0.3V to 3.9V (VCCmax + 0.3V)

DC Voltage Applied to Outputs

in High-Z State [6, 7]................–0.3V to 3.9V (VCCmax + 0.3V)

DC Input Voltage [6, 7] ........... –0.3V to 3.9V (VCC max + 0.3V)

Output Current into Outputs (LOW) ............................ 20 mA

Static Discharge Voltage .......................................... > 2001V

(MIL-STD-883, Method 3015)

Latch up Current .................................................... > 200 mA

Operating Range

Device Range Ambient

Temperature VCC [8]

CY62157EV30LL Ind’l/Auto-A –40°Cto +85°C 2.20V to

3.60V

Electrical Characteristics

Over the Operating Range

Parameter Description Test Conditions 45 ns (Ind’l/Auto-A) Unit

Min Typ [2] Max

VOH Output HIGH Voltage IOH = –0.1 mA 2.0 V

IOH = –1.0 mA, VCC >2.70V 2.4 V

VOL Output LOW Voltage IOL = 0.1 mA 0.4 V

IOL = 2.1mA, VCC >2.70V 0.4 V

VIH Input HIGH Voltage VCC = 2.2V to 2.7V 1.8 VCC + 0.3 V

VCC = 2.7V to 3.6V 2.2 VCC + 0.3 V

VIL Input LOW Voltage VCC = 2.2V to 2.7V –0.3 0.6 V

VCC = 2.7V to 3.6V –0.3 0.8 V

IIX Input Leakage Current GND < VI< VCC –1 +1 µA

IOZ Output Leakage Current GND < VO <VCC, Output Disabled –1 +1 µA

ICC VCC Operating Supply Current f = fmax = 1/tRC VCC = VCCmax

IOUT = 0 mA

CMOS levels

18 25

f = 1 MHz 1.8 3

ISB1 Automatic CE Power Down

Current — CMOS Inputs CE1> VCC − 0.2V, CE2 <0.2V

VIN >VCC – 0.2V, VIN <0.2V)

f = fmax (Address and Data Only),

f = 0 (OE, BHE, BLE and WE), VCC = 3.60V

28µA

ISB2 [9] Automatic CE Power Down

Current — CMOS Inputs CE1> VCC – 0.2V or CE2< 0.2V,

VIN > VCC – 0.2V or VIN < 0.2V, f = 0, VCC = 3.60V

28µA

Capacitance [10]

Parameter Description Test Conditions Max Unit

CIN Input Capacitance TA= 25°C, f = 1 MHz,

VCC = VCC(typ)

10 pF

COUT Output Capacitance 10 pF

Notes

6. VIL(min) = –2.0V for pulse durations less than 20 ns.

7. VIH(max) = VCC + 0.75V for pulse durations less than 20 ns.

8. Full device AC operation assumes a 100 µs ramp time from 0 to Vcc(min) and 200 µs wait time after VCC stabilization.

9. Only chip enables (CE1 and CE2), byte enables (BHE and BLE) and BYTE (48 TSOP I only) need to be tied to CMOS levels to meet the ISB2 / ICCDR spec. Other

inputs can be left floating.

10. Tested initially and after any design or process changes that may affect these parameters.

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CY62157EV30 MoBL®

Document #: 38-05445 Rev. *E Page 5 of 14

Thermal Resistance [10]

Parameter Description Test Conditions BGA TSOP I TSOP II Unit

ΘJA Thermal Resistance

(Junction to Ambient)

Still Air, soldered on a 3 × 4.5 inch,

two-layer printed circuit board

72 74.88 76.88 °C/W

ΘJC Thermal Resistance

(Junction to Case)

8.86 8.6 13.52 °C/W

AC Test Loads and Waveforms

Figure 1. AC Test Loads and Waveforms

Parameters 2.5V 3.0V Unit

R1 16667 1103 Ω

R2 15385 1554 Ω

RTH 8000 645 Ω

VTH 1.20 1.75 V

VCC

OUTPUT

30 pF

INCLUDING

JIG AND

SCOPE

GND

90%

10% 90%

10%

Rise Time = 1 V/ns Fall Time = 1 V/ns

OUTPUT V

Equivalent to: THÉVENIN EQUIVALENT

ALL INPUT PULSES

RTH

Data Retention Characteristics

Over the Operating Range

Parameter Description Conditions Min Typ [2] Max Unit

VDR VCC for Data Retention 1.5 V

ICCDR [9] Data Retention Current VCC= 1.5V, CE1> VCC – 0.2V,

CE2< 0.2V, VIN > VCC – 0.2V or VIN < 0.2V

Ind’l/Auto-A 2 5 µA

tCDR [10] Chip Deselect to Data

Retention Time 0ns

tR [11] Operation Recovery Time tRC ns

Data Retention Waveform[12]

Figure 2. Data Retention Waveform

VCC(min)

tCDR

VDR >1.5V

DATA RETENTION MODE

VCC(min)

CE1or

VCC

BHE.BLE

Notes

11. Full device operation requires linear VCC ramp from VDR to VCC(min) > 100 µs or stable at VCC(min) > 100 µs.

12. BHE.BLE is the AND of both BHE and BLE. Deselect the chip by either disabling chip enable signals or by disabling both BHE and BLE.

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CY62157EV30 MoBL®

Document #: 38-05445 Rev. *E Page 6 of 14

Switching Characteristics

Over the Operating Range[13, 14]

Parameter Description 45 ns (Ind’l/Auto-A) Unit

Min Max

Read Cycle

tRC Read Cycle Time 45 ns

tAA Address to Data Valid 45 ns

tOHA Data Hold from Address Change 10 ns

tACE CE1LOW and CE2 HIGH to Data Valid 45 ns

tDOE OE LOW to Data Valid 22 ns

tLZOE OE LOW to LOW-Z[15] 5ns

tHZOE OE HIGH to High-Z[15, 16] 18 ns

tLZCE CE1LOW and CE2 HIGH to Low-Z[15] 10 ns

tHZCE CE1HIGH and CE2 LOW to High-Z[15, 16] 18 ns

tPU CE1LOW and CE2 HIGH to Power Up 0 ns

tPD CE1HIGH and CE2 LOW to Power Down 45 ns

tDBE BLE/BHE LOW to Data Valid 45 ns

tLZBE BLE/BHE LOW to Low-Z[15, 17] 5ns

tHZBE BLE/BHE HIGH to HIGH-Z[15, 16] 18 ns

Write Cycle[18]

tWC Write Cycle Time 45 ns

tSCE CE1LOW and CE2 HIGH to Write End 35 ns

tAW Address Setup to Write End 35 ns

tHA Address Hold from Write End 0 ns

tSA Address Setup to Write Start 0 ns

tPWE WE Pulse Width 35 ns

tBW BLE/BHE LOW to Write End 35 ns

tSD Data Setup to Write End 25 ns

tHD Data Hold from Write End 0 ns

tHZWE WE LOW to High-Z[15, 16] 18 ns

tLZWE WE HIGH to Low-Z[15] 10 ns

Notes

13. Test conditions for all parameters other than tri-state parameters assume signal transition time of 3 ns or less, timing reference levels of VCC(typ)/2, input pulse

levels of 0 to VCC(typ), and output loading of the specified IOL/IOH as shown in the “AC Test Loads and Waveforms” on page 5.

14. AC timing parameters are subject to byte enable signals (BHE or BLE) not switching when chip is disabled. See application note AN13842 for further clarification.

15. At any temperature and voltage condition, tHZCE is less than tLZCE, tHZBE is less than tLZBE, tHZOE is less than tLZOE, and tHZWE is less than tLZWE for any device.

16. tHZOE, tHZCE, tHZBE, and tHZWE transitions are measured when the outputs enter a high-impedance state.

17. If both byte enables are toggled together, this value is 10 ns.

18. The internal write time of the memory is defined by the overlap of WE, CE = VIL, BHE, BLE or both = VIL, and CE2 = VIH. All signals must be active to initiate a

write and any of these signals can terminate a write by going inactive. The data input setup and hold timing must be referenced to the edge of the signal that

terminates the write.

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CY62157EV30 MoBL®

Document #: 38-05445 Rev. *E Page 7 of 14

Switching Waveforms

Read Cycle No. 1 (Address Transition Controlled)[19, 20]

Figure 3. Read Cycle No. 1

Read Cycle No. 2 (OE Controlled)[20, 21]

Figure 4. Read Cycle No. 2

PREVIOUS DATA VALID DATA VALID

tAA

tOHA

tRC

ADDRESS

DATA OUT

50%

DATA VALID

tRC

tACE

tDOE

tLZOE

tLZCE

tPU

HIGH IMPEDANCE

tHZOE

tPD

tHZBE

tLZBE

HZCE

tDBE

CE1

ADDRESS

CE2

BHE/BLE

DATA OUT

VCC

SUPPLY

CURRENT

HIGH

ICC

ISB

IMPEDANCE

Notes

19. The device is continuously selected. OE, CE1 = VIL, BHE, BLE, or both = VIL, and CE2 = VIH.

20. WE is HIGH for read cycle.

21. Address valid before or similar to CE1, BHE, BLE transition LOW and CE2transition HIGH.

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CY62157EV30 MoBL®

Document #: 38-05445 Rev. *E Page 8 of 14

Write Cycle No. 1 (WE Controlled)[18, 22, 23]

Figure 5. Write Cycle No. 1

Write Cycle No. 2 (CE1or CE2 Controlled)[18, 22, 23]

Figure 6. Write Cycle No. 1

Switching Waveforms (continued)

tHD

tSD

tPWE

tSA

tHA

tAW

tSCE

tWC

tHZOE

VALID DATA

tBW

NOTE 24

CE1

ADDRESS

CE2

DATA IO

BHE/BLE

tHD

tSD

tPWE

tHA

tAW

tSCE

tWC

tHZOE

VALID DATA

tBW

tSA

NOTE 24

CE1

ADDRESS

CE2

DATA IO

BHE/BLE

Notes

22. Data IO is high impedance if OE = VIH.

23. If CE1goes HIGH and CE2goes LOW simultaneously with WE = VIH, the output remains in a high impedance state.

24. During this period, the IOs are in output state. Do not apply input signals.

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CY62157EV30 MoBL®

Document #: 38-05445 Rev. *E Page 9 of 14

Write Cycle No. 3 (WE Controlled, OE LOW)[23]

Figure 7. Write Cycle No. 3

Write Cycle No. 4 (BHE/BLE Controlled, OE LOW)[23]

Figure 8. Write Cycle No. 4

Switching Waveforms (continued)

VALID DATA

tHD

tSD

tLZWE

tPWE

tSA

tHA

tAW

tSCE

tWC

tHZWE

tBW

NOTE 24

ADDRESS

DATA IO

BHE

/BLE

tHD

tSD

tSA

tHA

tAW

tWC

VALID DATA

tBW

tSCE

tPWE

NOTE 24

ADDRESS

DATA IO

BHE

/BLE

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CY62157EV30 MoBL®

Document #: 38-05445 Rev. *E Page 10 of 14

Truth Table

CE1CE2WE OE BHE BLE Inputs/Outputs Mode Power

H X X X X X High-Z Deselect/Power Down Standby (ISB)

X L X X X X High-Z Deselect/Power Down Standby (ISB)

X X X X H H High-Z Deselect/Power Down Standby (ISB)

L H H L L L Data Out (IO0–IO15)Read Active (ICC)

L H H L H L Data Out (IO0–IO7);

High-Z (IO8–IO15)Read Active (ICC)

L H H L L H High-Z (IO0–IO7);

Data Out (IO8–IO15)

Read Active (ICC)

L H H H L H High-Z Output Disabled Active (ICC)

L H H H H L High-Z Output Disabled Active (ICC)

L H H H L L High-Z Output Disabled Active (ICC)

L H L X L L Data In (IO0–IO15)Write Active (ICC)

L H L X H L Data In (IO0–IO7);

High-Z (IO8–IO15)

Write Active (ICC)

L H L X L H High-Z (IO0–IO7);

Data In (IO8–IO15)

Write Active (ICC)

Ordering Information

Speed

(ns) Ordering Code

Package

Diagram Package Type Operating

Range

45 CY62157EV30LL-45BVI 51-85150 48-ball Very Fine Pitch Ball Grid Array Industrial

CY62157EV30LL-45BVXI 51-85150 48-ball Very Fine Pitch Ball Grid Array (Pb-free)

CY62157EV30LL-45ZSXI 51-85087 44-pin Thin Small Outline Package Type II (Pb-free)

CY62157EV30LL-45ZXI 51-85183 48-pin Thin Small Outline Package Type I (Pb-free)

45 CY62157EV30LL-45BVXA 51-85150 48-ball Very Fine Pitch Ball Grid Array (Pb-free) Automotive-A

CY62157EV30LL-45ZSXA 51-85087 44-pin Thin Small Outline Package Type II (Pb-free)

Contact your local Cypress sales representative for availability of these parts.

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