cy62128-55vc Cypress Semiconductor Corporation., cy62128-55vc Datasheet - Page 3

• Manufacturer Part Number: cy62128-55vc
• Description: 128k X 8 Static Ram Semiconductor
• Manufacturer: Cypress Semiconductor Corporation.

Capacitance
AC Test Loads and Waveforms
Switching Characteristics
OUTPUT
C
C
READ CYCLE
t
t
t
t
t
t
t
t
t
t
t
WRITE CYCLE
t
t
t
t
t
t
t
Shaded areas contain advance information
Notes:
Equivalent to:
RC
AA
OHA
ACE
DOE
LZOE
HZOE
LZCE
HZCE
PU
PD
WC
SCE
AW
HA
SA
PWE
SD
5.
6.
7.
8.
9.
IN
OUT
Parameter
INCLUDING
JIG AND
SCOPE
Tested initially and after any design or process changes that may affect these parameters.
Test conditions assume signal transition time of 5ns or less, timing reference levels of 1.5V, input pulse levels of 0 to 3.0V, and output loading of the specified
I
t
At any given temperature and voltage condition, t
The internal write time of the memory is defined by the overlap of CE
and the transition of any of these signals can terminate the write. The input data set-up and hold timing should be referenced to the leading edge of the signal that terminates
the write.
OL
HZOE
5V
Parameter
/I
OH
OUTPUT
, t
100 pF
HZCE
and 100pF load capacitance.
, and t
[5]
[9]
(a)
Read Cycle Time
Address to Data Valid
Data Hold from Address Change
CE
OE LOW to Data Valid
OE LOW to Low Z
OE HIGH to High Z
CE
CE
CE
CE
Write Cycle Time
CE
Address Set-Up to Write End
Address Hold from Write End
Address Set-Up to Write Start
WE Pulse Width
Data Set-Up to Write End
THÉVENIN EQUIVALENT
HZWE
R1 1800
1
1
1
1
1
1
LOW to Data Valid, CE
LOW to Low Z, CE
HIGH to High Z, CE
LOW to Power-Up, CE
HIGH to Power-Down, CE
LOW to Write End, CE
are specified with a load capacitance of 5 pF as in part (b) of AC Test Loads. Transition is measured 500 mV from steady-state voltage.
639
Input Capacitance
Output Capacitance
990
R2
Description
[3,6]
OUTPUT
[7, 8]
Over the Operating Range
1.77V
INCLUDING
JIG AND
SCOPE
5V
PRELIMINARY
Description
2
2
HIGH to Low Z
HZCE
LOW to High Z
2
2
2
HIGH to Power-Up
HIGH to Write End
5 pF
HIGH to Data Valid
is less than t
2
LOW to Power-Down
(b)
R1 1800
T
V
LZCE
A
CC
[8]
1
= 25 C, f = 1 MHz,
[7, 8]
, t
62128-3
LOW, CE
= 5.0V
HZOE
3
Test Conditions
is less than t
990
2
R2
HIGH, and WE LOW. CE
LZOE
GND
3.0V
, and t
5ns
Min.
HZWE
55
55
45
45
45
45
5
0
5
0
0
0
62128–55
1
is less than t
and WE must be LOW and CE
Max.
10%
55
55
20
20
20
55
90%
LZWE
ALL INPUT PULSES
Max.
for any given device.
9
9
Min.
70
70
60
60
50
55
5
0
5
0
0
0
62128–70
2
HIGH to initiate a write,
CY62128
Max.
70
70
35
25
25
70
Unit
pF
pF
90%
62128-4
10%
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
5 ns