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SN74SSTUB32864

SCAS791A – OCTOBER 2006 – REVISED SEPTEMBER 2007

TERMINAL FUNCTIONS

TERMINAL

ELECTRICAL

DESCRIPTION

NAME

CHARACTERISTICS

GND

Ground

Ground input

Power-supply voltage

1.8 V nominal

Input reference voltage

0.9 V nominal

CLK

Positive master clock input

Differential input

CLK

Negative master clock input

Differential input

C0, C1

Configuration control input. Register A or Register B and 1:1 mode or 1:2 mode select.

LVCMOS inputs

RESET

LVCMOS input

receivers. When RESET is low, all Q outputs are forced low and the QERR output is forced high.

D1-D25

Data input. Clocked in on the crossing of the rising edge of CLK and the falling edge of CLK.

SSTL_18 inputs

CSR, DCS

SSTL_18 inputs

DODT

The outputs of this register bit will not be suspended by the DCS and CSR control.

SSTL_18 input

DCKE

The outputs of this register bit will not be suspended by the DCS and CSR control.

SSTL_18 input

Data outputs that are suspended by the DCS and CSR control.

1.8 V CMOS outputs

QCS

Data output that will not be suspended by the DCS and CSR control

1.8 V CMOS output

QODT

Data output that will not be suspended by the DCS and CSR control

1.8 V CMOS output

QCKE

Data output that will not be suspended by the DCS and CSR control

1.8 V CMOS output

NC

No internal connection

DNU

Do not use. Inputs are in standby-equivalent mode, and outputs are driven low.

(1)

Data inputs = D2, D3, D5, D6, D8-D25 when C0 = 0 and C1 = 0

Data inputs = D2, D3, D5, D6, D8-D14 when C0 = 0 and C1 = 1

Data inputs = D1-D6, D8-D10, D12, D13 when C0 = 1 and C1 = 1.D

(2)

Data outputs = Q2, Q3, Q5, Q6, Q8-Q25 when C0 = 0 and C1 = 0

Data outputs = Q2, Q3, Q5, Q6, Q8-Q14 when C0 = 0 and C1 = 1

Data outputs = Q1-Q6, Q8-Q10, Q12, Q13 when C0 = 1 and C1 = 1.

FUNCTION TABLE

INPUTS

OUTPUTS

RESET

DCS

CSR

CLK

CLK

Dn

Qn

H

L

X

↑

↓

L

L

H

L

X

↑

↓

H

H

H

X

L

↑

↓

L

L

H

X

L

↑

↓

H

H

H

H

H

↑

↓

X

H

X

X

L or H

L or H

X

L

X or Floating X or Floating

X or Floating

X or Floating

X or Floating

L

FUNCTION TABLE

INPUTS

OUTPUTS

RESET

CLK

CLK

DCKE, DCS, DODT QCKE, QCS, QODT

H

↑

↓

H

H

H

↑

↓

L

L

H

L or H

L or H

X

L

X or Floating

X or Floating

X or Floating

L

Copyright © 2006–2007, Texas Instruments Incorporated

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