CY7C199
Document #: 38-05160 Rev. **
Page 5 of 16
Switching Characteristics Over the Operating Range[3, 7]
7C199-8
7C199-10
7C199-12
7C199-15
Unit
Parameter
Description
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
READ CYCLE
tRC
Read Cycle Time
8
10
12
15
ns
tAA
Address to Data Valid
8
101215
ns
tOHA
Data Hold from Address Change
3
33
3
ns
tACE
CE LOW to Data Valid
8
101215
ns
tDOE
OE LOW to Data Valid
4.5
5
5
7
ns
tLZOE
OE LOW to Low Z[8]
0
00
0
ns
tHZOE
OE HIGH to High Z[8, 9]
5557
ns
tLZCE
CE LOW to Low Z[8]
3
33
3
ns
tHZCE
CE HIGH to High Z[8,9]
4557
ns
tPU
CE LOW to Power-Up
0
00
0
ns
tPD
CE HIGH to Power-Down
8
101215
ns
WRITE CYCLE[10, 11]
tWC
Write Cycle Time
8
10
12
15
ns
tSCE
CE LOW to Write End
7
79
10
ns
tAW
Address Set-Up to Write End
7
79
10
ns
tHA
Address Hold from Write End
0
00
0
ns
tSA
Address Set-Up to Write Start
0
00
0
ns
tPWE
WE Pulse Width
7
78
9
ns
tSD
Data Set-Up to Write End
5
58
9
ns
tHD
Data Hold from Write End
0
00
0
ns
tHZWE
WE LOW to High Z[9]
5677
ns
tLZWE
WE HIGH to Low Z[8]
3
33
3
ns
Shaded area contains advance information.
Notes:
7.
Test conditions assume signal transition time of 3 ns or less for -12 and -15 speeds and 5 ns or less for -20 and slower speeds, timing reference levels of 1.5V,
input pulse levels of 0 to 3.0V, and output loading of the specified IOL/IOH and 30-pF load capacitance.
8.
At any given temperature and voltage condition, tHZCE is less than tLZCE, tHZOE is less than tLZOE, and tHZWE is less than tLZWE for any given device.
9.
tHZOE, tHZCE, and tHZWE are specified with CL = 5 pF as in part (b) of AC Test Loads. Transition is measured ±500 mV from steady-state voltage.
10. The internal write time of the memory is defined by the overlap of CE LOW and WE LOW. Both signals must be LOW to initiate a write and either signal can terminate
a write by going HIGH. The data input set-up and hold timing should be referenced to the rising edge of the signal that terminates the write.
11. The minimum write cycle time for write cycle #3 (WE controlled, OE LOW) is the sum of tHZWE and tSD.