CDP1822C Datasheet Preview

CDP1822C Datasheet

256-Word by 4-Bit LSI Static Random-Access Memory

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Random-Access Memories (RAMs) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __

CDP1822, CDP1822C

VSS

Dr I

001

012

9 I.

10 13

" 12

TOP VIEW

Voo

Riw

CSi

C52

DO.

014

003

002

92CS-29976 RI

CDP1822, CDP1822C

TERMINAL ASSIGNMENTS

256-Word by 4-Bit LSI Static

Random-Access Memory

Features:

• Low operating current-8 mA at Voo=5 V

and cycle time=1 /is

• Industry standard pinout

• Two Chip-Select inputs-simple

memory expansion

• Memory retention for standby battery

voltage of 2 V min.

• Output-Disable for common I/O systems

• 3-state data output for bus-oriented

systems

• Separate data inputs and outputs

The RCA-CDP1822 and CDP1822C are 256-word by 4-blt

static random-access memories designed for use In memory

systems where high speed. low operating current. and

simplicity in use are desirable. The CDP1822 features high

speed and a wide operating voltage range. Both types have

separate data inputs and outputs and utilize single power

supplies of 4 to 6" volts for the CDP1822C and 4 to 10.5

volts for the CDP1822.

Two Chip-Select inputs are provided to simplify system

expansion. An Output Disable control provides Wire-OR

capability and is also useful in common Input/Output

systems. The Output Disable Input allows these RAMs to be

used in common data Input/Output systems by forcing the

output into a high-impedance state during a write operation

independent of the Chip-Select input condition. The output

assumes a high-impedance state when the Output Disable

is at high level or when the chip is deselected by CST and/or

CS2.

The high nOise immunity of the CMOS technology is

preserved in this design. For TTL interfacing at 5-V

operation. excellent system noise margin is preserved by

using an external pull-up resistor at each Input.

The CDP1822 and CDP1822C types are supplied in 22-lead

hermetic dual-in-line side-brazed ceramic packages (D

suffix). in 22-lead dual-in-line plastic packages (E suffix).

The CDP1822C is also available in chip form (H suffix).

OPERATIONAL MODES

MODE

Read

Write

Standby

Output Disable

Chip Select 1

CS1

INPUTS

Chip Select 2 Output Disable

CS2 00

Logic 1 =High Logic 0 =Low X =Don't Care

Read/Write

R/W

OUTPUT

Read

Data In

High Impedance

File Number 1074

654 _________________________________________________________

CDP1822C Datasheet Preview

CDP1822C Datasheet

256-Word by 4-Bit LSI Static Random-Access Memory

No Preview Available !

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Random-Access Memories (RAMs)

CDP1822,CDP1822C

RECOMMENDED OPERATING CONDITIONS at TA = Full Package-Temperature Range

For maximum reliability, operating conditions should be selected so that operation is always

within the following ranges:

CHARACTERISTIC

DC Operating Voltage Range

Input Voltage Range

LIMITS

CDP1822

CDP1822C

Min. I Max.

4 I 10.5

Min. I Max.

4 I 6.5

Vss I Voo

UNITS

MAXIMUM RATINGS, Absolute-Maximum Values:

DC SUPPLY-VOLTAGE RANGE. (Voo)

(Voltage referenced to Vss Terminal)

CDP1822 .........................................................................................................-0.5 to +11 V

CDP1822C ........................................................................................................-0.5 to +7 V

INPUT VOLTAGE RANGE, ALL INPUTS .......................................................................... -0.5 to Voo +0.5 V

DC INPUT CURRENT, ANY ONE INPUT ................................................................................... ±10 mA

POWER DISSIPATION PER PACKAGE (Po)

ForT.=-40 to +60·C (PACKAGE TYPE E) ................................................................................ 500 mW

ForT.=+60 to +85·C (PACKAGE TYPE E) .................................................. Derate Linearly at 12 mWI"C to 200 mW

For T.=-55 to +100· C (PACKAGE TYPE D) ............................................................................... 500 mW

ForT.=+100 to +125·C (PACKAGE TYPE D) ............................................... Derate Linearly at 12 mWI"C to 200 mW

DEVICE DISSIPATION PER OUTPUT TRANSISTOR

FOR T.=FULL PACKAGE-TEMPERATURE RANGE (All Package Types) ................................................... 100 mW

OPERATING-TEMPERATURE RANGE (TA)

PACKAGE TYPE D ............................................................................................... -55 to +125·C

PACKAGE TYPE E ................................................................................................ -40 to +85·C

STORAGE TEMPERATURE RANGE (T...) .............................................................•............•• -65 to +150·C

LEAD TEMPERATURE (DURING SOLDERING)

At distance 1/16 ± 1/32 In (159 ± 0 79 mm) from case for 10 s max ...................................................... +265·C

STATIC ELECTRICAL CHARACTERISTICS at TA = -40 to +85·C, Except as Noted

CHARACTERISTIC

Quiescent DeVice

Current,

Output Voltage:

Low-Level,

High-Level,

100

VOL

VOH

Input Low Voltage,

Input High Voltage,

Output Low (Sink)

Current,

Output High (Source)

Current,

Input Current,

3-State Output

Leakage Current

Operating Current,

Input Capacitance,

Output Capacitance,

V,L

V,H

10L

10H

liN

lOUT

loo,t

C'N

COUT

TEST CONDITIONS

Vo VIN VDD

(V) (V) (V)

- 0.5 5

- 0, 10 10

- 0,5 5

- 0,10 10

0.5,4.5

0.5,9.5

0.5,4.5

0.5,9.5

0,5

0,10

0.4 0,5

0.5 0, 10 10

4.6 0, 5

9.5 0, 10 10

- 0,5 5

- 0, 10 10

0,5 0,5

0, 10 0, 10

- 0,5

- 0, 10

LIMITS

CDP1822

CDP1822C

Min. Typ.· Max. Min. Typ.· Max.

- - 500 - - 500

- - 1000 - - -

- 0 0.1 -

0 0.1

- 0 0.1 - - -

-4.9 5

4.9 5 -

9.9 10 - - - -

-- - 1.5 -

1.5

- - 3- - -

3.5 - - 3.5 - -

7- - - - -

2 4- 2 4-

-4.5 9 - - -

-1 -2 -

--1 -2

-2.2 -4.4

- - ±5 - - ±5

- - ±10 - - -

- - ±5 - - ±5

- - ±10 - - -

-- 4 8

- 8 16 - - -

- -5 7.5

5 7.5

- -10 15

10 15

UNITS

rnA

tOutputs open circuited, cycle time = 1 p.s

"TYPical values are for TA = 25· C and nommal Voo

__________________________________________________________ 655

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CDP1822C Datasheet

256-Word by 4-Bit LSI Static Random-Access Memory

CDP1822C Datasheet

256-Word by 4-Bit LSI Static Random-Access Memory

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