SAA4955TJ Datasheet, PDF (14/28 Pages) NXP Semiconductors – 2.9-Mbit field memory

Philips Semiconductors
2.9-Mbit field memory
Product specification
SAA4955TJ
handbook, full pagewidNth − 1
SWCK
WE
D0 to D11 N − 1
IE
RSTW
N
disable
disable
tsu(WE)
th(WE)
tsu(WE)
th(WE)
tsu(D)
th(D)
N
tw(WEL)
Fig.7 Write cycle timing diagram (write enable).
N+1
−VIH
−VIL
−VIH
−VIL
N+1
−VIH
−VIL
−VIH
−VIL
−VIH
−VIL
MGK681
handbook, full pagewidNth− 1
SWCK
IE
D0 to D11 N − 1
N
disable
disable
tsu(IE)
th(IE)
tsu(IE)
th(IE)
tsu(D)
th(D)
N
tw(IEL)
N+3
−VIH
−VIL
−VIH
−VIL
N+3
−VIH
−VIL
−VIH
WE
−VIL
RSTW
Fig.8 Write cycle timing diagram (input enable = write mask operation).
−VIH
−VIL
MGK682
1999 Apr 29
14