AMD Advanced Micro Devices AM27X256-200PC, AM27X256-200JI, AM27X256-200JC, AM27X256-150PI, AM27X256-150PC Datasheet

FINAL

Am27X256

256 Kilobit (32 K x 8-Bit) CMOS ExpressROM Device

DISTINCTIVE CHARACTERISTICS

■As an OTP EPROM alternative:

—Factory optimized programming

—Fully tested and guaranteed

■As a Mask ROM alternative:

—Shorter leadtime

—Lower volume per code

■Fast access time

—55 ns

■Single +5 V power supply

■Compatible with JEDEC-approved EPROM pinout

■±10% power supply tolerance

■High noise immunity

■Low power dissipation

—20 µA maximum CMOS standby current

■Available in Plastic Dual-In-line Package (PDIP) and Plastic Leaded Chip Carrier (PLCC)

■Latch-up protected to 100 mA from –1 V to VCC + 1 V

■Versatile features for simple interfacing

—Both CMOS and TTL input/output compatibility

—Two line control functions

GENERAL DESCRIPTION

The Am27X256 is a factory programmed and tested OTP EPROM. It is programmed after packaging prior to final test. Every device is rigorously tested under AC and DC operating conditions to your stable code. It is organized as 32 Kwords by 8 bits per word and is available in plastic dual in-line packages (PDIP), as well as plastic leaded chip carrier (PLCC) packages. ExpressROM devices provide a board-ready memory solution for medium to high volume codes with short leadtimes. This offers manufacturers a cost-effective and flexible alternative to OTP EPROMs and mask programmed ROMs.

Data can be accessed as fast as 55 ns, allowing high-performance microprocessors to operate with reduced WAIT states. The device offers separate Output Enable (OE#) and Chip Enable (CE#) controls, thus eliminating bus contention in a multiple bus microprocessor system.

AMD’s CMOS process technology provides high speed, low power, and high noise immunity. Typical power consumption is only 80 mW in active mode, and 100 µW in standby mode.

BLOCK DIAGRAM

VCC

Data Outputs DQ0–DQ7

VSS

OE#

Output Enable

Chip Enable

Output

CE#

and

Buffers

Prog Logic

Y

Y

Decoder

Gating

A0–A14

Address

262,144

Inputs

X

Bit Cell

Decoder

Matrix

12082F-1

Publication# 12082 Rev: F Amendment/0

Issue Date: May 1998

PRODUCT SELECTOR GUIDE

Family Part Number					Am27X256
Speed Options	VCC = 5.0 V ± 5%							-255
	VCC = 5.0 V ± 10%	-55	-70	-90	-120	-150	-200
Max Access Time (ns)		55	70	90	120	150	200	250
CE# (E#) Access (ns)		55	70	90	120	150	200	250
OE# (G#) Access (ns)		35	40	40	50	50	50	50

CONNECTION DIAGRAMS

Top View

DIP PLCC

VPP		1	28	VCC
A12		2	27	A14
A7
		3	26	A13
A6				A8
		4	25
A5				A9
		5	24
A4				A11
		6	23
A3				OE# (G#)
		7	22
A2				A10
		8	21
A1				CE# (E#)
		9	20
A0				DQ7
		10	19
DQ0				DQ6
		11	18
DQ1				DQ5
		12	17
DQ2				DQ4
		13	16
VSS				DQ3
		14	15

				A7		A12		V		DU		V		A14		A13
								PP				CC
						3		2		1		32 31 30
			4
A6	5															29	A8
A5	6															28	A9
A4	7															27	A11
A3	8															26	NC
A2	9															25	OE# (G#)
A1	10															24	A10
A0	11															23	CE# (E#)
NC	12															22	DQ7
DQ0	13															21	DQ6
	14 15 16 17 18 19 20
				DQ1		DQ2		SS		DU		DQ3		DQ4		DQ5
								V

12082F-2 12082F-3

Notes:

1. JEDEC nomenclature is in parenthesis.

2. Don’t use (DU) for PLCC.

PIN DESIGNATIONS			LOGIC SYMBOL
A0–A14	=	Address Inputs
CE# (E#)	=	Chip Enable Input	15
DQ0–DQ7	=	Data Input/Outputs					A0–A14		8
OE# (G#)	=	Output Enable Input
								DQ0–DQ7
PGM# (P#)	=	Program Enable Input
							CE# (E#)
VCC	=	VCC Supply Voltage
VPP	=	Program Voltage Input					OE# (G#)
VSS	= Ground
NC	=	No Internal Connection									12082F-4

2

Am27X256

ORDERING INFORMATION

Standard Products

AMD standard products are available in several packages and operating ranges. The order number (Valid Combination) is formed by a combination of the following:

AM27X256

-55

J

C XXXXX

CODE DESIGNATION

Assigned by AMD

TEMPERATURE RANGE

C = Commercial (0°C to +70°C)

I = Industrial (–40°C to +85°C)

PACKAGE TYPE

P = 28-Pin Plastic Dual In-Line Package (PD 028)

J = 32-Pin Plastic Leaded Chip Carrier (PL 032)

SPEED OPTION

See Product Selector Guide and Valid Combinations

DEVICE NUMBER/DESCRIPTION

Am27X256

256 Kilobit (32 K x 8-Bit) CMOS ExpressROM Device

Valid Combinations

	AM27X256-55	PC, JC
	AM27X256-70
	AM27X256-90
	AM27X256-120
		PC, JC, PI, JI
	AM27X256-150
	AM27X256-200
	AM27X256-255
	VCC = 5.0 V ± 5%

Valid Combinations

Valid Combinations list configurations planned to be supported in volume for this device. Consult the local AMD sales office to confirm availability of specific valid combinations and to check on newly released combinations.

Am27X256

3