M27C4001-35B1TR Просмотр технического описания (PDF) - STMicroelectronics

Номер в каталоге

Компоненты Описание

производитель

M27C4001-35B1TR

4 Mbit (512Kb x 8) UV EPROM and OTP EPROM

STMicroelectronics 

M27C4001

Table 9. Programming Mode DC Characteristics (1)

(TA = 25 °C; VCC = 6.25V ± 0.25V; VPP = 12.75V ± 0.25V)

Symbol

Parameter

Test Condition

Min

Max

ILI

Input Leakage Current

0 ≤ VIN ≤ VCC

±10

ICC

Supply Current

50

IPP

Program Current

E = VIL

50

VIL

Input Low Voltage

–0.3

0.8

VIH

Input High Voltage

2

VCC + 0.5

VOL

Output Low Voltage

IOL = 2.1mA

0.4

VOH Output High Voltage TTL

IOH = –400µA

2.4

VID

A9 Voltage

11.5

12.5

Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP.

Unit

µA

mA

mA

V

V

V

V

V

Table 10. Programming Mode AC Characteristics (1)

(TA = 25 °C; VCC = 6.25V ± 0.25V; VPP = 12.75V ± 0.25V)

Symbol

Alt

Parameter

Test Condition

tAVEL

tAS Address Valid to Chip Enable Low

tQVEL

tDS Input Valid to Chip Enable Low

tVPHEL

tVPS VPP High to Chip Enable Low

tVCHEL

tVCS VCC High to Chip Enable Low

tELEH

tPW Chip Enable Program Pulse Width

tEHQX

tDH

Chip Enable High to Input

Transition

tQXGL

tOES

Input Transition to Output Enable

Low

Min

Max

Unit

2

µs

2

µs

2

µs

2

µs

95

105

µs

2

µs

2

µs

tGLQV

tOE Output Enable Low to Output Valid

100

ns

tGHQZ

tDFP Output Enable High to Output Hi-Z

0

130

ns

tGHAX

tAH

Output Enable High to Address

Transition

0

ns

Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP.

2. Sampled only, not 100% tested.

Programming

When delivered (and after each erasure for UV

EPROM), all bits of the M27C4001 are in the ’1’

state. Data is introduced by selectively program-

ming ’0’s into the desired bit locations. Although

only ’0’s will be programmed, both ’1’s and ’0’s can

be present in the data word. The only way to

change a ’0’ to a ’1’ is by die exposure to ultraviolet

light (UV EPROM). The M27C4001 is in the pro-

gramming mode when VPP input is at 12.75V, G is

at VIH and E is pulsed to VIL. The data to be pro-

grammed is applied to 8 bits in parallel to the data

output pins. The levels required for the address

and data inputs are TTL. VCC is specified to be

6.25V ± 0.25V.

7/17

Share Link: