IDT70T3339_15 Datasheet, PDF (17/27 Pages) Integrated Device Technology – HIGH-SPEED 2.5V SYNCHRONOUS DUAL-PORT STATIC RAM

IDT70T3339/19/99S
High-Speed 2.5V 512/256/128K x 18 Dual-Port Static RAM
Industrial and Commercial Temperature Ranges
Timing Waveform of Pipelined Read with Address Counter Advance⁽¹⁾
CLK
ADDRESS
tCYC2
tCH2 tCL2
tSA tHA
An
ADS
tSAD tHAD
tSAD tHAD
CNTEN
tSCN tHCN
tCD2
DATAOUT Qx - 1⁽²⁾
Qx
READ
EXTERNAL
ADDRESS
Qn
Qn + 1
tDC
READ WITH COUNTER
COUNTER
HOLD
Qn + 2⁽²⁾
,
Qn + 3
READ
WITH
COUNTER
5652 drw 15
Timing Waveform of Flow-Through Read with Address Counter Advance⁽¹⁾
CLK
ADDRESS
tCYC1
tCH1
tCL1
tSA tHA
An
ADS
CNTEN
tSAD tHAD
tSAD tHAD
tSCN tHCN
tCD1
DATAOUT
Qx⁽²⁾
Qn
Qn + 1
Qn + 2
tDC
Qn + 3⁽²⁾
,
Qn + 4
READ
EXTERNAL
ADDRESS
READ WITH COUNTER
COUNTER
HOLD
READ
WITH
COUNTER
5652 drw 16
NOTES:
1. CE0, OE, UB, LB = VIL; CE1, R/W, and REPEAT = VIH.
2. If there is no address change via ADS = VIL (loading a new address) or CNTEN = VIL (advancing the address), i.e. ADS = VIH and CNTEN = VIH, then
the data output remains constant for subsequent clocks.
61.472