Motorola MCM6208CJ20, MCM6208CJ15, MCM6208CJ12, MCM6208CJ12R2, MCM6208CP35 Datasheet

MCM6208C

1

MOTOROLA FAST SRAM

64K x 4 Fast Static RAM

The MCM6208C is fabricated using Motorola’s high–performance silicon–gate
CMOS technology. Static design eliminates the need for external clocks or timing
strobes, while CMOS circuitry reduces power consumption and provides for
greater reliability.

This device meets JEDEC standards for functionality and pinout, and is avail­able in plastic dual–in–line and plastic small–outline J–leaded packages.

• Single 5 V ± 10% Power Supply

• Fully Static — No Clock or Timing Strobes Necessary

• Fast Access Times: 12, 15, 20, 25, and 35 ns

• Equal Address and Chip Enable Access Times

• Low Power Operation: 135 –165 mA Maximum AC

• Fully TTL Compatible — Three–State Output

ROW

DECODER

MEMORY ARRAY

256 ROWS x

64 x 4 COLUMNS

INPUT

DATA

CONTROL

E

A13
A14

A4

A1

A12

A6

A3

A2

W

DQ3

DQ2

DQ1

DQ0

COLUMN I/O

COLUMN DECODER

V

SS

V

CC

BLOCK DIAGRAM

A0 A5 A7 A8 A9 A10 A11 A15

Order this document

by MCM6208C/D

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

PIN ASSIGNMENT

MCM6208C

P PACKAGE

300 MIL PLASTIC

CASE 724A–01

J PACKAGE
300 MIL SOJ

CASE 810A–02

PIN NAMES

A0 – A15 Address Input. . . . . . . . . . . . .

DQ0 – DQ3 Data Input/Data Output. . .

W Write Enable. . . . . . . . . . . . . . . . . . . .

E

Chip Enable. . . . . . . . . . . . . . . . . . . . . .

V

CC

Power Supply (+ 5 V). . . . . . . . . . .

V

SS

Ground. . . . . . . . . . . . . . . . . . . . . . .

NC No Connection. . . . . . . . . . . . . . . . .

A5

A3

A2

A1

A0

A7

A6

A4 A12

A13

A14

A15

V

CC

DQ2

DQ1

DQ0

5

4

3

2

1

10

9

8

7

6

14

15

16

17

18

19

20

13

11
12

21

22

23

24

W

DQ3

A10

A11

E

V

SS

A9

A8

REV 4
6/95

 Motorola, Inc. 1994

MCM6208C
2

MOTOROLA FAST SRAM

TRUTH TABLE (X = Don’t Care)

E

W Mode VCC Current Output Cycle

H
L
L

X
H
L

Not Selected

Read
Write

I

SB1

, I

SB2

I

CCA

I

CCA

High–Z

D

out

High–Z

—
Read Cycle
Write Cycle

ABSOLUTE MAXIMUM RATINGS (See Note)

Rating

Symbol Value Unit

Power Supply Voltage V

CC

– 0.5 to + 7.0 V

Voltage Relative to VSS For Any Pin
Except V

CC

Vin, V

out

– 0.5 to VCC + 0.5 V

Output Current I

out

± 20 mA

Power Dissipation P

D

1.0 W

Temperature Under Bias T

bias

– 10 to + 85 °C

Operating Temperature T

A

0 to + 70 °C

Storage Temperature — Plastic T

stg

– 55 to + 125 °C

NOTE: Permanent device damage may occur if ABSOLUTE MAXIMUM RATINGS are

exceeded. Functional operation should be restricted to RECOMMENDED OPER­ATING CONDITIONS. Exposure to higher than recommended voltages for
extended periods of time could affect device reliability.

DC OPERATING CONDITIONS AND CHARACTERISTICS

(VCC = 5.0 V ± 10%, TA = 0 to 70°C, Unless Otherwise Noted)

RECOMMENDED OPERATING CONDITIONS

Parameter Symbol Min Typ Max Unit

Supply Voltage (Operating Voltage Range) V

CC

4.5 5.0 5.5 V

Input High Voltage V

IH

2.2 —

VCC + 0.3**

V

Input Low Voltage V

IL

– 0.5*

— 0.8 V

*VIL (min) = – 0.5 V dc; VIL (min) = – 2.0 V ac (pulse width ≤ 20 ns)

**VIH (max) = VCC + 0.3 V dc; VIH (max) = VCC + 2.0 V ac (pulse width ≤ 20 ns)

DC CHARACTERISTICS

Parameter Symbol Min Max Unit

Input Leakage Current (All Inputs, Vin = 0 to VCC) I

lkg(I)

— ± 1 µA

Output Leakage Current (E1 = VIH, V

out

= 0 to VCC) I

lkg(O)

— ± 1 µA

Standby Current (E ≥ VCC – 0.2 V*, Vin ≤ VSS + 0.2 V, or ≥ VCC – 0.2 V,
VCC = Max, f = 0 MHz)

I

SB2

— 20 mA

Output Low Voltage (IOL = 8.0 mA) V

OL

— 0.4 V

Output High Voltage (IOH = – 4.0 mA) V

OH

2.4 — V

POWER SUPPLY CURRENTS

Parameter Symbol – 12 – 15 – 20 – 25 – 35 Unit

AC Supply Current (I

out

= 0 mA, VCC = Max, f = f

max

) I

CCA

165 155 145 135 135 mA

Standby Current (E = VIH, VCC = Max, f = f

max

) I

SB1

55 50 45 40 40 mA

This device contains circuitry to protect the
inputs against damage due to high static volt­ages or electric fields; however, it is advised
that normal precautions be taken to avoid
application of any voltage higher than maxi­mum rated voltages to this high–impedance
circuit.

This CMOS memory circuit has been
designed to meet the dc and ac specifications
shown in the tables, after thermal equilibrium
has been established. The circuit is in a test
socket or mounted on a printed circuit board
and transverse air flow of at least 500 linear
feet per minute is maintained.

MCM6208C

3

MOTOROLA FAST SRAM

CAPACITANCE (f = 1 MHz, dV = 3 V, T

A

= 25°C, Periodically Sampled Rather Than 100% Tested)

Characteristic

Symbol Max Unit

Address Input Capacitance C

in

6 pF

Control Pin Input Capacitance (E, G, W) C

in

6 pF

I/O Capacitance C

I/O

8 pF

AC OPERATING CONDITIONS AND CHARACTERISTICS

(VCC = 5.0 V ± 10%, TA = 0 to + 70°C, Unless Otherwise Noted)

Input Timing Measurement Reference Level 1.5 V. . . . . . . . . . . . . . .

Input Pulse Levels 0 to 3.0 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input Rise/Fall Time 5 ns. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output Timing Measurement Reference Level 1.5 V. . . . . . . . . . . . .

Output Load Figure 1A Unless Otherwise Noted. . . . . . . . . . . . . . . .

READ CYCLE (See Notes 1 and 2)

– 12 – 15 – 20 – 25 –35

Parameter Symbol Min Max Min Max Min Max Min Max Min Max Unit Notes

Read Cycle Time t

AVAV

12 — 15 — 20 — 25 — 35 — ns 2

Address Access Time t

AVQV

— 12 — 15 — 20 — 25 — 25 ns

Enable Access Time t

ELQV

— 12 — 15 — 20 — 25 — 25 ns 3

Output Enable Access Time t

GLQV

— 6 — 8 — 10 — 12 — — ns

Output Hold from Address Change t

AXQX

4 — 4 — 4 — 4 — 4 — ns

Enable Low to Output Active1 t

ELQX

4 — 4 — 4 — 4 — 4 — ns 4, 5, 6

Enable High to Output High–Z t

EHQZ

0 6 0 8 0 9 0 10 0 10 ns 4, 5, 6

Output Enable Low to Output Active t

GLQX

0 — 0 — 0 — 0 — 0 — ns 4, 5, 6

Output Enable High to Output High–Z t

GHQZ

0 6 0 7 0 8 0 10 0 — ns 4, 5, 6

Power Up Time t

ELICCH

0 — 0 — 0 — 0 — 0 — ns

Power Down Time t

EHICCL

— 12 — 15 — 20 — 25 — 35 ns

NOTES:

1. W

is high for read cycle.

2. All timings are referenced from the last valid address to the first transitioning address.

3. Addresses valid prior to or coincident with E

going low.

4. At any given voltage and temperature, t

EHQZ

max is less than t

ELQX

min, and t

GHQZ

max is less than t

GLQX

min, both for a given device

and from device to device.

5. Transition is measured ±500 mV from steady–state voltage with load of Figure 1B.

6. This parameter is sampled and not 100% tested.

7. Device is continuously selected (E1

≤ VIL).

AC TEST LOADS

Figure 1A Figure 1B

The table of timing values shows either a
minimum or a maximum limit for each param­eter. Input requirements are specified from
the external system point of view. Thus, ad­dress setup time is shown as a minimum
since the system must supply at least that
much time (even though most devices do not
require it). On the other hand, responses from
the memory are specified from the device
point of view. Thus, the access time is shown
as a maximum since the device never pro­vides data later than that time.

TIMING LIMITS

OUTPUT

Z0 = 50

Ω

RL = 50

Ω

VL = 1.5 V

5 pF

+ 5 V

OUTPUT

255

Ω

480

Ω