U621708DC07G1 - Alliance Memory, Inc.

1 September 1, 2004

U621708

S131072 x 8 bit static CMOS RAM

S70 ns Access Time

SCommon data inputs and

data outputs

SThree-state outputs

STyp. operating supply current

70 ns: 15 mA

SStandby current < 1 mA at 85°C

STTL/CMOS-compatible

SPower supply voltage 5 V

SOperating temperature range

0 °C to 70 °C

-40 °C to 85 °C

SQS 9000 Quality Standard

SESD protection > 750 V

(MIL STD 883C M3015.7)

SLatch-up immunity >100 mA

SPackage: PDIP32 (600 mil)

SOP32 (450 mil)

TSOP I 32

sTSOP I 32

The U621708 is a static RAM

manufactured using a CMOS pro-

cess technology with the following

operating modes:

- Read - Standby

- Write - Data Retention

The memory array is based on a

6-Transistor cell.

The circuit is activated by the rising

edge of E2 (at E1 = L), or the falling

edge of E1 (at E2 = H). The

address and control inputs open

simultaneously. According to the

information of W and G, the data

inputs, or outputs, are active.

During the active state (E1 = L and

E2 = H) each address change

leads to a new Read cycle. In a

Read cycle, the data outputs are

activated by the falling edge of G

afterwards the data word will be

available at the outputs DQ0-DQ7.

After the address change, the data

outputs go High-Z until the new

information is available. The data

outputs have no preferred state. If

the memory is driven by CMOS

levels in the active state, and if

there is no change of the address,

data input and control signals W or

G, the operating current (IO = 0 mA)

drops to the value of the operating

current in the Standby mode. The

Read cycle is finished by the falling

edge of E2 or W, or by the rising

edge of E1, respectively.

Data retention is guaranteed down

to 2 V. With the exception of E1

and E2, all inputs consist of NOR

gates, so that no pull-up/pull-down

resistors are required.

128K x 8 SRAM

Pin Configuration

Top View

Signal Name Signal Description

A0 - A16 Address Inputs

DQ0 - DQ7 Data In/Out

E1 Chip Enable 1

E2 Chip Enable 2

GOutput Enable

WWrite Enable

VCC Power Supply Voltage

VSS Ground

n.c. not connected

Pin Description

n.c. VCC32

2A16 A1531

4A12 W

5A7 A1328

3A14 E230

6A6 A827

7A5 A926

8A4 A1125

12A0 DQ721

9A3 G

A2 A1023

11A1 E1

13DQ0 DQ620

14DQ1 DQ519

PDIP

DQ4

DQ3

DQ2

VSS

DescriptionFeatures

Top View

A11 G32

2A9 A1031

4A13 DQ7

5W DQ628

3A8 E1

6E2 DQ527

7A15 DQ426

8VCC DQ325

12A12 DQ021

9n.c. VSS

A16 DQ223

11A14 DQ1

13A7 A020

14A6 A119

TSOP

sTSOP

SOP

2 September 1, 2004

U621708

*H or L

Operating Mode E1 E2 W GDQ0 - DQ7

Standby/not selected

*L** High-Z

H*** High-Z

Internal Read L H H H High-Z

Read L H H L Data Outputs Low-Z

Write L H L * Data Inputs High-Z

Truth Table

Block Diagram

DQ0

DQ1

DQ2

DQ3

DQ4

DQ5

DQ6

DQ7

VCC VSS W GE1

Row Address

Inputs

Column Address

Inputs

Address

Change

Detector

Column Decoder Row Decoder

Sense Amplifier/

Write Control Logic

Common Data I/O

Memory Cell

Array

1024 Rows x

128 x 8 Columns

A10

A11

A12

A13

A14

A15

A16

Clock

Generator

3 September 1, 2004

U621708

aStresses 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 condition 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

bMaximum voltage is 7 V

cNot more than 1 output should be shorted at the same time. Duration of the short circuit should not exceed 30 s.

Absolute Maximum Ratings aSymbol Min. Max. Unit

Power Supply Voltage VCC -0.5 7 V

Input Voltage VI-0.5 VCC + 0.5 bV

Output Voltage VO-0.5 VCC + 0.5 bV

Power Dissipation PD-1W

Operating Temperature C-Type

K-Type

Ta0

-40

°C

Storage Temperature Tstg -65 150 °C

Output Short-Circuit Current

at VCC = 5 V and VO = 0 V c| IOS | 200 mA

Characteristics

All voltages are referenced to VSS = 0 V (ground).

All characteristics are valid in the power supply voltage range and in the operating temperature range specified.

Dynamic measurements are based on a rise and fall time of ≤ 5 ns, measured between 10 % and 90 % of VI, as well as

input levels of VIL = 0 V and VIH = 3 V. The timing reference level of all input and output signals is 1.5 V,

with the exception of the tdis-times and ten-times, in which cases transition is measured ±200 mV from steady-state voltage.

d-2 V at Pulse Width 10 ns

Recommended

Operating Conditions Symbol Conditions Min. Max. Unit

Power Supply Voltage VCC 4.5 5.5 V

Input Low Voltage*VIL -0.3 0.8 V

Input High Voltage VIH 2.2 VCC + 0.3 V

4 September 1, 2004

U621708

Electrical Characteristics Symbol Conditions Min. Max. Unit

Supply Current - Operating Mode

Supply Current - Standby Mode

(CMOS level)

Supply Current - Standby Mode

(TTL level)

ICC(OP)

ICC(SB)

ICC(SB)1

VCC

VIL

VIH

VCC

VE1= VE2

VCC

VE1= VE2

= 5.5 V

= 0.8 V

=2.2 V

=5.5 V

= VCC - 0.2 V

= 5.5 V

= 2.2 V

Output High Voltage

Output Low Voltage

VOH

VOL

VCC

IOH

VCC

IOL

= 4.5 V

=-4.0 mA

=4.5 V

=8.0 mA

2.4

0.4

Input High Leakage Current

Input Low Leakage Current

IIH

IIL

VCC

VIH

VCC

VIL

= 5.5 V

= 0 V

-2

2µA

µA

Output High Current

Output Low Current

IOH

IOL

VCC

VOH

VCC

VOL

=4.5 V

= 2.4 V

=4.5 V

=0.4 V

-4 mA

Output Leakage Current

High at Three-State Outputs

Low at Three-State Outputs

IOHZ

IOLZ

VCC

VOH

VCC

VOL

=5.5 V

=0 V

-2

2µA

µA

5 September 1, 2004

U621708

Switching Characteristics

Read Cycle

Symbol 70

Unit

Alt. IEC Min. Max.

Read Cycle Time tRC tcR 70 ns

Address Access Time to Data Valid tAA ta(A) 70 ns

Chip Enable Access Time to Data Valid tACE ta(E) 70 ns

G LOW to Data Valid tOE ta(G) 25 ns

E1 HIGH or E2 LOW to Output in High-Z tHZCE tdis(E) 15 ns

G HIGH to Output in High-Z tHZOE tdis(G) 15 ns

E1 LOW or E2 HIGH to Output in Low-Z tLZCE ten(E) 10 ns

G LOW to Output in Low-Z tLZOE ten(G) 5ns

Output Hold Time from Address Change tOH tv(A) 10 ns

E1 LOW or E2 HIGH to Power-Up Time tPU 0ns

E1 HIGH or E2 LOW to Power-Down Time tPD 70 ns

Switching Characteristics

Write Cycle

Symbol 70

Unit

Alt. IEC Min. Max.

Write Cycle Time tWC tcW 70 ns

Write Pulse Width tWP tw(W) 35 ns

Write Setup Time tWP tsu(W) 35 ns

Address Setup Time tAS tsu(A) 0ns

Address Valid to End of Write tAW tsu(A-WH) 35 ns

Chip Enable Setup Time tCW tsu(E) 40 ns

Pulse Width Chip Enable to End of Write tCW tw(E) 40 ns

Data Setup Time tDS tsu(D) 25 ns

Data Hold Time tDH th(D) 0ns

Address Hold from End of Write tAH th(A) 0ns

W LOW to Output in High-Z tHZWE tdis(W) 20 ns

G HIGH to Output in High-Z tHZOE tdis(G) 15 ns

W HIGH to Output in Low-Z tLZWE ten(W) 5ns

G LOW to Output in Low-Z tLZOE ten(G) 5ns

W to Chip Enable Setup Time tWE tsu(W-E) 10 ns

6 September 1, 2004

U621708

Data Retention

Characteristics

Symbol

Conditions Min. Typ. Max. Unit

Alt. IEC

Data Retention Supply Voltage VCC(DR) 25.5V

Data Retention Supply Current ICC(DR) VCC(DR) = 3 V

VE1 =VE2 = VCC(DR) - 0.2 V

0.6 mA

Data Retention Setup Time tCDR tsu(DR) See Data Retention

Waveforms (below)

0ns

Operating Recovery Time tRtrec tcR ns

Data Retention Mode E1 - controlled

Data Retention

4.5 V

tsu(DR) trec

VCC

VCC(DR) ≥ 2 V

0 V

2.2 V

Data Retention Mode E2 - controlled

VE2(DR) ≥ VCC(DR) - 0.2 V or VE2(DR) ≤ 0.2 V

VCC(DR) - 0.2 V ≤ VE1(DR) ≤ VCC(DR) + 0.3 V

0.8 V

4.5 V

0 V

VCC

VE1(DR) ≥ VCC(DR) - 0.2 V or VE1(DR) ≤ 0.2 V

VE2(DR) ≤ 0.2 V

trec

tDR

VCC(DR) ≥ 2 V

Data Retention

Data Retention Mode

7 September 1, 2004

U621708

Date of manufacture

(The first 2 digits indicating

the year, and the last 2

digits the calendar week.)

Leadfree Green Package

Product specification

Assembly location and

trace code

Internal Code

Operating Temperature Range

C = 0 to 70 °C

K = -40 to 85 °C

S07KU621708

Type

Package

D = PDIP32 (600 mil)

S = SOP32 (450 mil)

T=TSOP I 32

T1 = sTSOP I 32

Ordering Code

Leadfree Option

blank = Standard Package

G1 = Leadfree Green Package f

Access Time

07 = 70 ns

Device Marking (example)

ZMD

U621708SK

07 C 0425

1 ZZ G1

f on special request

Example

Capacitance Conditions Symbol Min. Max. Unit

Input Capacitance VCC

= 5.0 V

= VSS

= 1 MHz

= 25 °C

CI7pF

Output Capacitance Co7pF

DQ0

DQ1

DQ2

DQ3

DQ4

DQ5

DQ6

DQ7

Test Configuration for Functional Check

VIH

VIL

VSS

VCC

5 V

481

255

e In measurement of tdis(E),tdis(W), ten(E), ten(W), ten(G) the capacitance is 5 pF.

Input level according to the

relevant test measurement

Simultaneous measure-

ment of all 8 output pins

A10

A11

A12

A13

A14

A15

A16

All pins not under test must be connected with ground by capacitors.

30 pF e

8 September 1, 2004

U621708

Previous Data Valid Output Data Valid

Address Valid

Read Cycle 1: Ai-controlled (during Read Cycle : E1 = G = VIL, W = E2 = VIH)

Read Cycle 2: G-, E1, E2-controlled (during Read Cycle: W = VIH)

ta(A)

tcR

tv(A)

DQi

Output

tcR

High-Z

Addresses Valid

DQi

Output

tdis(E)

tsu(A) ta(E)

tsu(A)

ten(E)

ten(G)

ta(G)

ta(E)

tdis(E)

tdis(G)

Output Data Valid

tPD*

tPU*

ICC(OP)

ICC(SB)

* The same applies to E1

50 % 50 %

Write Cycle1: W-controlled

tsu(W-E)

th(D)

DQi

Output

tcW

tsu(E) th(A)

tw(W)

tsu(A)

tsu(E)

tsu(D)

tdis(W)

ten(W)

Addresses Valid

High-Z

Input

Input Data Valid

9 September 1, 2004

U621708

Write Cycle 2: E1-controlled

High-Z

Input Data Valid

th(D)

tsu(W)

tw(E)

tsu(D)

tcW

Addresses Valid

tsu(A)

tsu(E) th(A)

ten(E)

tdis(W)

DQi

Input

DQi

Output

Write Cycle 3 (E2-controlled)

tdis(G)

The information describes the type of component and shall not be considered as assured characteristics.Terms of

delivery and rights to change design reserved.

L- to H-level

undefined H- to L-level

tsu(A)

th(D)

DQi

Input

DQi

Output

tcW

tw(E) th(A)

tsu(W)

tsu(E)

tsu(D)

tdis(W)

ten(E)

Addresses Valid

Input Data Valid

High-Z

tdis(G)

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Phone: +49 351 8822 306 • Fax: +49 351 8822 337 • Email: memory@zmd.de • http://www.zmd.de

September 1, 2004

U621708

LIFE SUPPORT POLICY

ZMD products are not designed, intended, or authorized for use as components in systems intended for surgical

implant into the body, or other applications intended to support or sustain life, or for any other application in which

the failure of the ZMD product could create a situation where personal injury or death may occur.

Components used in life-support devices or systems must be expressly authorized by ZMD for such purpose.

LIMITED WARRANTY

The information in this document has been carefully checked and is believed to be reliable. However Zentrum

Mikroelektronik Dresden AG (ZMD) makes no guarantee or warranty concerning the accuracy of said information

and shall not be responsible for any loss or damage of whatever nature resulting from the use of, or reliance upon it.

The information in this document describes the type of component and shall not be considered as assured charac-

teristics.

ZMD does not guarantee that the use of any information contained herein will not infringe upon the patent, trade-

mark, copyright, mask work right or other rights of third parties, and no patent or licence is implied hereby. This

document does not in any way extent ZMD’s warranty on any product beyond that set forth in its standard terms and

conditions of sale.

ZMD reserves terms of delivery and reserves the right to make changes in the products or specifications, or both,

presented in this publication at any time and without notice.