SN74ACT7200L, SN74ACT7201LA, SN74ACT7202LA
256 × 9, 512 × 9, 1024 × 9
ASYNCHRONOUS FIRST-IN, FIRST-OUT MEMORIES
SCAS221A – FEBRUARY 1993 – REVISED SEPTEMBER 1995
9
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (see Figure 13)
PARAMETER FIGURE
′ACT7200L-15
′ACT7201LA-15
′ACT7202LA-15
′ACT7200L-25
′ACT7201LA-25
′ACT7202LA-25
′ACT7201LA-35†
′ACT7202LA-35†′ACT7200L-50
′ACT7201LA-50
′ACT7202LA-50 UNIT
MIN MAX MIN MAX MIN MAX MIN MAX
taAccess time, R↓ or EF↑ to
data out valid 1(a), 3,
515 25 35 50 ns
tv(RH) Valid time, data out valid
after R↑1(a) 5 5 5 5 ns
ten(R-QX) Enable time, R↓ to Q
outputs at low impedance‡1(a) 5 5 10 10 ns
ten(W-QX) Enable time, W↑ to Q
outputs at low
impedance‡§ 5 5 5 5 15 ns
tdis(R) Disable time, R↑ to Q
outputs at high
impedance‡1(a) 15 18 20 30 ns
tw(FH) Pulse duration, FF high in
automatic write mode 6 15 25 30 45 ns
tw(EH) Pulse duration, EF high in
automatic read mode 5 15 25 30 45 ns
tpd(W-F) Propagation delay time,
W↓ to FF low 2 15 25 30 45 ns
tpd(R-F) Propagation delay time,
R↑ to FF high 2, 6, 12 15 25 30 45 ns
tpd(RS-F) Propagation delay time,
RS↓ to FF high 7 25 35 45 65 ns
tpd(RS-HF) Propagation delay time,
RS↓ to XO/HF high 7 25 35 45 65 ns
tpd(W-E) Propagation delay time,
W↑ to EF high 3, 5, 11 15 25 30 45 ns
tpd(R-E) Propagation delay time,
R↓ to EF low 3 15 25 30 45 ns
tpd(RS-E) Propagation delay time,
RS↓ to EF low 7 25 35 45 65 ns
tpd(W-HF) Propagation delay time,
W↓ to XO/HF low 8 25 35 45 65 ns
tpd(R-HF) Propagation delay time,
R↑ to XO/HF high 8 25 35 45 65 ns
tpd(R-XOL) Propagation delay time,
R↓ to XO/HF low 9 15 25 35 50 ns
tpd(W-XOL) Propagation delay time,
W↓ to XO/HF low 9 15 25 35 50 ns
tpd(R-XOH) Propagation delay time,
R↑ to XO/HF high 9 15 25 35 50 ns
tpd(W-XOH) Propagation delay time,
W↑ to XO/HF high 9 15 25 35 50 ns
tpd(RT-FL) Propagation delay time,
FL/RT↓ to HF, EF, FF valid 4 25 35 45 65 ns
†Released in RJ package only
‡These values are characterized but not currently tested.
§Only applies when data is automatically read (see Figure 5)