AUSTIN SMJ27C010A-12JM, SMJ27C010A-15JM, SMJ27C010A-20JM Datasheet

Austin Semiconductor, Inc.

UVEPROM

SMJ27C010A

1 MEG UVEPROM

UV Erasable Programmable
Read-Only Memory

A VAILABLE AS MILITA R Y
SPECIFICATIONS

• SMD 5962-89614

• MIL-STD-883

FEATURES

• Organized 131,072 x 8

• Single +5V ±10% power supply

• Operationally compatible with existing megabit EPROMs

• Industry standard 32-pin ceramic dual-in-line package

• All inputs/outputs fully TTL compatible

• 8-bit output for use in microprocessor-based systems

• Very high-speed SNAP! Pulse Programming

• Power-saving CMOS technology

• 3-state output buffers

• 400mV minimum DC noise immunity with standard
TTL loads

• Latchup immunity of 250 mA on all input and output pins

• No pullup resistors required

• Low power dissipation (Vcc = 5.5V)

PActive - 165 mW Worst Case
PStandby - 0.55 mW Worst Case (CMOS-input levels)

OPTIONS MARKING

• Timing

120ns access -1 2
150ns access -1 5
200ns access -2 0

• Package(s)

Ceramic DIP (600mils) J No. 114

• Operating Temperature Ranges

Military (-55oC to +125oC) M

For more products and information

please visit our web site at

www.austinsemiconductor.com

SMJ27C010A

Rev. 1.0 9/01

PIN ASSIGNMENT

(Top View)

32-Pin DIP (J)

(600 MIL)

1

V

PP

2

A16

3

A15

4

A12

5

A7

6

A6

7

A5

8

A4

9

A3

10

A2

11

A1

12

A0

13

DQ0

14

DQ1

15

DQ2

16

GND

Pin Name Function

A0 - A18 Address Inputs

DA0-DQ7 Inputs (programming)/Outputs

E\ Chip Enable
G\ Output Enable

GND Ground

PGM\ Program

V

5V Supply

CC

V

13V Power Supply*

PP

*Only in program mode.

Vcc

32

PGM\

31

NC

30

A14

29

A13

28

A8

27

A9

26

A11

25

G\

24

A10

23
22

E\

21

DQ7

20

DQ6

19

DQ5

18

DQ4

17

DQ3

GENERAL DESCRIPTION

The SMJ27C010A series are 131072 by 8-bit (1048576­bit), ultaviolet (UV) light erasable, electrically programmable
read-only memories (EPROMs).
These devices are fabricated using power-saving CMOS
technology for high speed and simple interface with MOS and
bipolar circuits. All inputs (including program data inputs)
can be driven by Series 54 TTL circuits without the use of
external pullup resistors. Each output can drive one Series 54
TTL circuit without external resistors.
The SMJ27C010A EPROM is offered in a ceramic
dual-in-line package (J suffix) designed for insertion in
mounting-hole rows on 15.2mm (600mil) centers.
These EPROMs operate from a single 5V supply (in the
read mode), and therefore, are ideal for use in
microprocessor-based systems. One other 13V supply is
needed for programming. All programming signals are TTL
level. These devices are programmable using the SNAP! Pulse
programming algorithm. The SNAP! Pulse programming

algorithm uses a VPP of 13V and a VCC of 6.5V for a nominal
programming time of thirteen seconds. For programming
outside the system, existing EPROM programmers can be
used. Locations can be programmed singly, in blocks, or at
random.

Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.

1

Austin Semiconductor, Inc.

FUNCTIONAL BLOCK DIAGRAM*

EPROM 131,072 x 8

12

A0

11

A1

10

A2

9

A3

8

A4

7

A5 DQ0

6

A6 DQ1

5

A7 DQ2

27

A8 DQ3

26

A9 DQ4

E\

G\

23
25

4

28
29
3

2
22

24

A10 DQ5
A11 DQ6
A12 DQ7
A13
A14
A15
A16

0

A

16
[PWR DWN]

&

EN

0

131,071

A
A
A
A
A
A
A
A

UVEPROM

SMJ27C010A

13
14
15
17
18

19
20
21

* This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. J package illustrated.

OPERATION

The seven modes of operation are listed in Table 1. The read mode requires a single 5V supply. All inputs are TTL level
except for VPP during programming (13V for SNAP! Pulse), and 12V on A9 for signature mode.

TABLE 1. OPERATION MODES

MODE*

FUNCTION

E\

G\

READ

V
V

PGM\ X X X

V

PP

V

CC

V

V
A9 X X X X X X
A0 X X X X X X

DQ0-DQ7 Data Out High-Z High-Z Data In Data Out High-Z

* X can be VIL or VIH.

= 12V ± 0.5V

**V

H

SMJ27C010A

Rev. 1.0 9/01

IL
IL

CC
CC

OUTPUT

DISABLE

V

IL

V

IH

V

CC

V

CC

STANDBY PROGRAMMING VERIFY

V

IH

X

V

CC

V

CC

V

IL

V

IH

V

IL

V

PP

V

CC

V

IL

V

IL

V

IH

V

PP

V

CC

Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.

2

PROGRAM

INHIBIT

V

IH

X
X

V

PP

V

CC

SIGNATURE MODE

V

IL

V

IL

X

V

CC

V

CC

** VH**

V

H

V

IL

V

IH

CODE

MFG DEVICE

97 D6

Austin Semiconductor, Inc.

UVEPROM

SMJ27C010A

READ/OUTPUT DISABLE

When the outputs of two or more SMJ27C010As are
connected in parallel on the same bus, the output of any
particular device in the circuit can be read with no
interference from competing outputs of the other devices. To
read the output of a single device, a low level signal is applied
to the E\ and G\ pins. All other devices in the circuit should
have their outputs disabled by applying a high-level signal to
one of these pins.

LA TCHUP IMMUNITY

Latchup immunity on the SMJ27C010A is a minimum of
250mA on all inputs and outputs. This feature provides latchup
immunity beyond any potential transients at the printed
circuit board level when the devices are interfaced to
industry-standard TTL or MOS logic devices. The input/
output layout approach controls latchup without
compromising performance or packing density.

POWER DOWN

Active ICC supply current can be reduced from 30mA to 500µA
by applying a high TTL input on E\ and to 100µA by applying a
high CMOS input on E\. In this mode all outputs are in the
high-impedance state.

ERASURE

Before programming, the SMJ27C010A EPROM is erased
by exposing the chip through the transparent lid to a high­intensity ultraviolet light (wavelength 2537 Å). The
recommended minimum exposure dose (UV intensity x

exposure time) is 15-W.s/cm2. A typical 12-mW/cm2,
filterless UV lamp erases the device in 21 minutes. The lamp
should be located about 2.5cm above the chip during erasure.
After erasure, all bits are in the high state. It should be noted
that normal ambient light contains the correct wavelength for
erasure; therefore, when using the SMJ27C010A, the window
should be covered with an opaque label. After erasure (all
bits in logic high state), logic lows are programmed into the
desired locations. A programmed low can be erased only by
ultraviolet light.

SNAP! PULSE PROGRAMMING

The SMJ27C010A is programmed by using the SNAP! Pulse
programming algorithm as illustrated by the flow chart
(Figure 1). This algorithm programs in a nominal time of
thirteen seconds. Actual programming time varies as a
function of the programmer used.

The SNAP! Pulse programming algorithm uses an initial pulse
of 100 microseconds (µs) followed by a byte verification to
determine when the addressed byte has been successfully
programmed. Up to ten 100µs pulses per byte are provided
before a failure is recognized.

The programming mode is achieved when V
VCC= 6.5V, E\ = VIL, and G\ = VIH. Data is presented in

parallel (eight bits) on pins DQ0 through DQ7. Once addresses
and data are stable, PGM\ is pulsed low.

More than one device can be programmed when the devices
are connected in parallel. Locations can be programmed in
any order. When the SNAP! Pulse programming routine is

complete, all bits are verified with VCC = VPP = 5V ± 10%.

= 13V,

PP

PROGRAM INHIBIT

Programming can be inhibited by maintaining high level
inputs on the E\ or the PGM\ pins.

PROGRAM VERIFY

Programmed bits can be verified with VPP = 13V when
G\ = VIL, and E\ = VIL, and PGM\ = VIH.

SIGNA TURE MODE

The signature mode provides access to a binary code
identifying the manufacturer and type. This mode is activated
when A9 (pin 26) is forced to 12V. Two identifier bytes are
accessed by toggling A0. All other addresses must be held
low. The signature code for these devices is 97D6. A0 low
selects the manufacturer’s code 97 (Hex), and A0 high
selects the device code D6 (Hex), as shown in Table 2.

TABLE 2. SIGNATURE MODES

IDENTIFIER*

MANUFACTURER CODE
DEVICE CODE

* E\ = G\ = VIL, A1 - A8 = VIL, A9 = VH, A10 - A16 = VIL, VPP = VCC.

SMJ27C010A

Rev. 1.0 9/01

A0 DQ7 DQ6 DQ5 DQ4 DQ3 DQ2 DQ1 DQ0 HEX

V

IL

V

IH

1001011197
11010110D6

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PINS

Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.

UVEPROM

SMJ27C010A

Austin Semiconductor, Inc.

FIGURE 1. SNAP! PULSE PROGRAMMING FLOW CHART

START

Address = First Location

Increment

Address

VCC = 6.5V ± 0.25V, VPP = 13V ± 0.25V

Program One Pulse = tW = 100µs

Last

Address?

Yes

Address = First Location

X = 0

Verify

One
Byte

Pass

Fail

Increment Address

Program One Pulse = tW = 100µs

No

X = X+1

X = 10?

Program

Mode

Interactive

Mode

SMJ27C010A

Rev. 1.0 9/01

No

VCC = VPP = 5V ± 0.5V

Last

Address?

Yes

Compare
All Bytes

to Original

Data

Pass

Device Passed

Fail

Yes

Device Failed

Final

Verification

Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.

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